The Science Behind Gold Testing Machine In China: Properties, Production, and Applications

Types of Gold Testing Machines in China

In China’s booming precious metals industry, accurate and efficient gold testing is essential for jewelers, refineries, pawn shops, and customs agencies. With a wide range of technologies available, choosing the right gold testing machine depends on factors like accuracy, cost, portability, and whether the item can be damaged during testing. Below is a detailed overview of the most widely used types of gold testers manufactured and utilized across Chinese factories and trading centers.

Chemical Test Kit

One of the oldest and most affordable methods, this kit uses nitric or aqua regia acid applied to a scratch mark on the gold surface to determine karat based on chemical reaction.

Advantages

• Low cost and widely accessible
• Fast results (within seconds)
• No electricity or training required
• Effective for basic karat estimation

Limitations

• Destructive – leaves a scratch on the item
• Cannot detect gold-plated fakes reliably
• Subjective interpretation of color change
• Less accurate for low-karat or alloyed gold

Best for: Small jewelry shops, preliminary screening, scrap gold assessment

Gold Tester with Display

An upgraded version of the acid test that incorporates electronic sensors and a digital screen to interpret the reaction, reducing human error.

Advantages

• Digital readout improves consistency
• Faster and more objective than manual kits
• Compact and easy to use
• Improved accuracy over traditional acid tests

Limitations

• Still requires scratching the item
• Limited to surface-level testing
• May give false readings on plated items
• Higher cost than basic kits

Best for: Mid-tier jewelers, quality control in workshops, semi-automated testing

XRF Gold Analyzer

X-ray Fluorescence (XRF) analyzers are non-destructive instruments that emit X-rays to excite the atoms in a sample, measuring the emitted secondary X-rays to determine elemental composition.

Advantages

• Non-destructive – no damage to the item
• Highly accurate and precise
• Instant results (3–5 seconds)
• Tests multiple metals and alloys simultaneously
• Widely used in customs, refineries, and banks

Limitations

• High initial investment ($2,000–$15,000+)
• Surface-only analysis (cannot detect plating thickness reliably)
• Requires calibration and maintenance
• Regulated due to radiation emissions

Best for: High-volume dealers, export inspection, certification labs, luxury jewelry appraisal

Acoustic Gold Tester

This method evaluates gold authenticity by analyzing the sound frequency produced when a gold item is tapped or dropped onto a hard surface.

Advantages

• Non-destructive and quick
• Low-cost equipment
• No chemicals or power required (manual versions)
• Portable and easy to operate

Limitations

• Low accuracy and reliability
• Highly dependent on operator skill
• Cannot determine karat or purity
• Easily fooled by similar-density metals

Best for: Preliminary screening, educational use, informal trading environments

Gold Density Tester

Based on Archimedes’ principle, this method calculates specific gravity by measuring the weight of the item in air versus in water, then comparing it to known gold densities.

Advantages

• Highly accurate for solid gold items
• Non-destructive (if done carefully)
• Scientifically reliable and repeatable
• Effective at detecting hollow or filled fakes

Limitations

• Time-consuming process
• Not suitable for porous or complex-shaped items
• Requires precise scales and controlled environment
• Less effective for mixed alloys or plating

Best for: Refineries, assaying labs, verification of high-value bullion

Vidi Gold Tester

A high-end electronic tester using advanced conductivity and electromagnetic technology to analyze karat and alloy composition instantly without damaging the item.

Advantages

• Non-destructive and highly accurate
• Instant results (under 2 seconds)
• Can test gold, silver, platinum, and palladium
• Minimal operator training required
• Resistant to surface contamination

Limitations

• Expensive (typically $1,500–$4,000)
• Less effective on very thin plating or small items
• Requires regular calibration
• Limited availability outside major suppliers

Best for: Professional jewelers, auction houses, high-end pawnbrokers, export verification

Testing Method	Accuracy	Destructive?	Speed	Cost Level	Best Use Case
Chemical Test Kit	Medium	Yes	Fast	Low	Basic karat estimation, scrap gold
Gold Tester with Display	Medium-High	Yes	Fast	Medium	Workshop quality control
XRF Analyzer	Very High	No	Very Fast	High	Labs, customs, high-value appraisal
Acoustic Tester	Low	No	Fast	Low	Preliminary screening
Density Tester	High	No	Slow	Medium	Refineries, bullion verification
Vidi Gold Tester	Very High	No	Very Fast	High	Professional jewelry appraisal

Expert Tip: For maximum reliability, combine non-destructive methods like XRF or Vidi testing with density checks for high-value transactions. This dual-method approach helps detect sophisticated fakes such as tungsten-filled gold bars.

Market Insight: In China, Guangdong and Zhejiang provinces are leading hubs for gold testing equipment manufacturing, with many suppliers offering OEM/ODM services for international markets. Always verify device certifications (e.g., CE, RoHS) when sourcing from Chinese manufacturers.

Specifications and Features of Gold Testing Machines in China

Gold testing machines play a crucial role in the jewelry, mining, refining, and financial sectors across China, where gold trading and authentication are widespread. These devices ensure accurate, reliable, and non-destructive analysis of gold purity and composition. Understanding their technical specifications and operational features helps buyers, jewelers, and quality control professionals choose the right equipment for their needs—whether for retail, industrial, or forensic applications.

Technical Specifications of Gold Density Testers

Density-based testing is a widely used, cost-effective method for determining gold purity by measuring specific gravity. It is based on Archimedes’ principle and is especially popular in small jewelry shops and pawnbrokers due to its simplicity and non-destructive nature.

Testing Accuracy

Gold density testers offer high precision, with measurement accuracy typically within ±0.01 g/cm³. This level of accuracy enables reliable differentiation between various karat levels (e.g., 18K, 22K, 24K) and detection of plated or counterfeit items.

Measurement Range

These testers can measure materials with densities ranging from 1 g/cm³ to 21 g/cm³, covering not only all forms of gold but also other precious metals like silver, platinum, and palladium. This broad range makes them versatile for multi-metal testing environments.

Operation Requirements

No specialized skills are required to operate a gold density tester. With minimal training, technicians can perform tests accurately. The process involves weighing the sample in air and then submerged in water, after which the device automatically calculates density and estimates gold purity.

Display and Readability

Equipped with a digital LCD or LED display, these machines provide instant results, reducing human error and increasing throughput. Some advanced models integrate software that logs data, generates reports, or connects to PCs for inventory management.

Key Features of Gold Density Testers

Beyond technical specs, the usability and practicality of gold density testers make them a preferred choice in fast-paced commercial environments.

• Simplicity in Operation: The testing process is straightforward—users simply clean the item, weigh it in air, submerge it in water, and read the result. No complex setup or hazardous materials are involved.
• Speed and Efficiency: A full test takes less than a minute, making it ideal for high-volume operations such as jewelry stores, pawnshops, and customs inspections.
• Compact and Portable Design: Many models are lightweight and benchtop-friendly, allowing easy integration into retail counters or mobile testing units. Some even come with carrying cases for field use.

XRF Gold Analyzers: Advanced Precision and Versatility

X-ray Fluorescence (XRF) analyzers represent the cutting edge in gold testing technology, widely adopted in refineries, assay offices, and large jewelry manufacturers across China. They offer non-destructive, rapid, and highly accurate elemental analysis.

Core Technical Specifications

XRF gold analyzers vary by model but share key features: a multi-element detector capable of identifying over 30 elements simultaneously, testing speed of 0.5 to 5 seconds, and a rechargeable lithium-ion battery enabling portability. High-end models can perform up to 50,000 tests on a single charge, making them ideal for continuous industrial use.

Precise Gold Purity Detection

Modern XRF machines deliver exceptional accuracy, measuring gold content down to ±0.01%. This precision is critical for refining operations, hallmarking, and legal compliance, where even minor deviations affect value and authenticity.

Testing Versatility

Unlike single-metal testers, XRF analyzers can identify and quantify multiple precious metals—including gold, silver, platinum, palladium, and rhodium—in a single scan. This eliminates the need for multiple devices and streamlines quality control in mixed-metal environments.

Data Management & Connectivity

Many XRF models feature USB, Bluetooth, or Wi-Fi connectivity, allowing seamless integration with inventory systems, lab software, or cloud storage. Reports can be exported in PDF or CSV formats for auditing and certification purposes.

Feature	Gold Density Tester	XRF Gold Analyzer
Accuracy	±0.01 g/cm³	±0.01% gold content
Test Speed	30–60 seconds	0.5–5 seconds
Destructive?	Non-destructive	Non-destructive
Portability	High (compact models)	Moderate to High (handheld versions available)
Metal Detection Range	Gold, silver, platinum (indirect)	30+ elements including all precious metals
Typical Use Case	Jewelry shops, pawnbrokers, small labs	Refineries, assay offices, large manufacturers

How to Use a Gold Testing Machine: Step-by-Step Guide

While specific procedures vary by model and technology, the general workflow for operating gold testing machines—whether density, XRF, or chemical testers—follows a standardized sequence to ensure accuracy and safety.

• Preparation: Thoroughly clean the gold item using a soft cloth, alcohol wipe, or ultrasonic cleaner to remove dirt, oils, or surface coatings. Contaminants can significantly skew test results, especially in density and XRF methods.
• Calibration: Before testing, calibrate the device using certified reference standards. For density testers, this involves zeroing the scale and using a calibration weight. XRF analyzers often require periodic calibration with known alloy samples to maintain spectral accuracy.
• Testing Process:
  • Density Testers: Weigh the item in air, then suspend it in water. The device calculates specific gravity and displays the estimated gold purity.
  • XRF Analyzers: Place the sample under the sensor or press the handheld probe against the surface. Press the trigger to initiate the scan—results appear in seconds.
  • Chemical Testers: Scratch the item on a test stone, apply nitric or aqua regia acid, and observe the reaction. Compare color changes to a reference chart.
• Observing and Recording Results: Digital testers display results on-screen, often with karat or percentage readouts. For chemical tests, interpretation relies on experience. Always document results for traceability, especially in commercial or regulatory settings.

Important: Always follow manufacturer guidelines for operation, calibration, and maintenance. Misuse—such as testing plated items with XRF without proper mode selection—can lead to inaccurate readings. In the case of chemical testers, handle acids with protective gear. Regular calibration and cleaning ensure long-term reliability and compliance with industry standards.

Uses of Gold Testing Machines in China

In China, gold-testing machines are essential tools across a wide range of industries, ensuring accuracy, authenticity, and compliance in the handling of precious metals. With one of the world’s largest markets for gold and a rapidly growing jewelry and electronics sector, reliable gold analysis is critical. These advanced instruments—ranging from X-ray fluorescence (XRF) spectrometers to electronic testers and acid-based testers—provide fast, non-destructive, and highly accurate assessments of gold purity and composition. Below are the major applications of gold-testing machines across key sectors in China.

Jewelry Manufacturing

In China’s expansive jewelry manufacturing hubs—such as Shenzhen and Guangzhou—gold-testing machines are used at every stage of production to verify the purity of raw materials and finished pieces. Manufacturers must adhere to strict national and international standards (e.g., 24K, 18K, 14K), and testing ensures compliance before casting, assembly, or plating.

• Verifies karat consistency across batches of gold alloys
• Prevents costly errors from using incorrect gold blends
• Supports quality assurance for export-grade jewelry meeting EU or US standards
• Enables real-time adjustments during alloy mixing processes

Key benefit: Reduces material waste and enhances brand reputation through consistent quality.

Gold Buying and Selling

Gold traders, bullion dealers, and exchange platforms across major financial centers like Shanghai and Beijing rely on gold-testing machines to authenticate incoming and outgoing gold. These devices ensure accurate valuation and prevent counterfeit or adulterated gold from entering the market.

• Used in gold exchanges and trading desks for instant verification
• Helps detect gold-plated tungsten or other base metals
• Supports transparent pricing based on actual gold content
• Facilitates trust between buyers, sellers, and financial institutions

Pro tip: High-end XRF analyzers can penetrate surface layers to detect hidden impurities.

Mining Industry

Chinese mining operations, particularly in provinces like Shandong and Henan, use gold-testing machines to evaluate ore samples for gold content before large-scale extraction and processing. Rapid on-site analysis helps optimize mining strategies and resource allocation.

• Enables quick assessment of ore grade in exploration phases
• Supports decisions on whether to process or discard low-yield materials
• Used in conjunction with geological surveys for feasibility studies
• Improves operational efficiency by reducing unnecessary processing

Technical note: Portable XRF devices allow real-time field testing, increasing productivity.

Refinery Operations

Gold refineries across China use sophisticated testing equipment to monitor the purity of gold throughout the refining process. From raw ore to 99.99% pure gold bars, continuous testing ensures maximum recovery and compliance with purity benchmarks.

• Determines exact gold concentration before and after smelting
• Identifies residual impurities such as silver, copper, or platinum group metals
• Ensures final product meets LBMA (London Bullion Market Association) or national standards
• Supports traceability and batch certification for high-value transactions

Critical role: Precision testing directly impacts profitability and marketability of refined gold.

Quality Control in Manufacturing

Beyond jewelry, gold is used in high-tech industries such as electronics, aerospace, and medical devices. In these applications, even minor deviations in gold purity can affect performance. Gold-testing machines ensure that components like connectors, circuit boards, and coatings meet exact specifications.

• Tests gold plating thickness and uniformity in electronic components
• Verifies purity in medical implants and aerospace sensors
• Supports ISO and industry-specific quality certifications
• Prevents failures due to poor conductivity or corrosion

Industry insight: Semiconductor manufacturers in cities like Suzhou use micro-XRF for nanoscale analysis.

Pawn Shops and Secondhand Markets

With a booming secondhand luxury goods market, pawn shops and buy-back centers in cities like Chengdu and Hangzhou use gold-testing machines to quickly and accurately assess the value of gold items offered as collateral or for resale.

• Enables fast turnaround for customer appraisals
• Reduces risk of accepting counterfeit or low-purity items
• Supports competitive pricing and customer trust
• Integrates with digital valuation systems for record-keeping

Time-saving tip: Handheld testers allow instant checks without damaging items.

Assay Offices and Certification Labs

Official assay offices and third-party laboratories in China use calibrated gold-testing machines to certify the fineness of gold bullion, coins, and bars. These certifications are essential for domestic trade, exports, and international market acceptance.

• Issues official purity certificates for investment-grade gold
• Conducts destructive and non-destructive testing for maximum accuracy
• Supports standardization under Chinese National Standards (GB/T)
• Provides audit trails for regulatory and tax purposes

Trust factor: Certified assay results enhance market confidence and liquidity.

Legal and Regulatory Compliance

Chinese authorities require strict oversight of the precious metals sector to prevent fraud, money laundering, and tax evasion. Gold-testing machines play a crucial role in compliance, enabling accurate reporting, auditing, and enforcement of industry regulations.

• Used by customs and tax agencies to verify declared gold content
• Supports anti-fraud initiatives in cross-border gold trade
• Ensures adherence to labeling laws for consumer protection
• Facilitates traceability in the gold supply chain under new regulatory frameworks

Regulatory insight: The State Administration for Market Regulation (SAMR) mandates testing for gold product certification.

Professional Recommendation: For businesses handling gold, investing in a mid-to-high-end XRF gold tester offers the best balance of accuracy, speed, and versatility. These machines support multiple testing modes, store data logs, and integrate with inventory systems—making them ideal for manufacturers, refiners, and trading platforms. Always ensure equipment is calibrated regularly and operators are trained to interpret results correctly.

Sector	Primary Use of Gold Tester	Common Testing Method	Accuracy Requirement
Jewelry Manufacturing	Purity verification of raw materials and finished goods	XRF, Electronic Testers	±0.1% Karat
Gold Trading	Authentication of bullion and bars	XRF, Ultrasonic	±0.5% Purity
Mining	Ore grade assessment	Portable XRF	±1% Relative
Refinery	Process monitoring and final product certification	Laboratory XRF, Fire Assay	±0.01% (High-Precision)
Electronics Manufacturing	Gold plating thickness and composition	Micro-XRF, EDX	±0.001µm
Pawn Shops	Quick valuation of secondhand items	Handheld XRF, Acid Test Kits	±0.3% Purity

Additional Considerations

• Technology Advancements: Modern Chinese-made testers now feature AI-assisted analysis, cloud connectivity, and multilayer scanning for enhanced detection.
• Training and Calibration: Regular calibration and operator training are essential to maintain accuracy and comply with national standards.
• Environmental Monitoring: Some testers also detect hazardous elements (e.g., lead, cadmium) in gold alloys, supporting environmental safety compliance.
• Cost vs. Capability: While basic testers are affordable, high-precision models offer long-term ROI through reduced losses and improved customer trust.
• Integration with Digital Systems: Leading businesses integrate test results with ERP and inventory management systems for real-time tracking.

Factors to Consider When Buying Gold Testing Machines in China

Purchasing a reliable gold testing machine from China requires careful evaluation of multiple technical, operational, and regulatory factors. With a growing number of suppliers offering advanced testing solutions, buyers must conduct thorough due diligence to ensure they invest in accurate, durable, and compliant equipment. This guide outlines the key considerations for selecting the right gold testing machine based on your specific testing needs, volume, and quality standards.

Important Note: Gold testing is a critical process in jewelry, refining, and financial sectors. Inaccurate readings can lead to significant financial loss or legal issues. Always verify the authenticity and certifications of both the machine and supplier before making a purchase.

1. Supplier Research and Credibility

Choosing a reputable supplier is the foundation of a successful purchase. A trustworthy manufacturer ensures product reliability, technical support, and long-term service availability.

• Check verified customer reviews on B2B platforms like Alibaba, Made-in-China, or Global Sources
• Look for suppliers with at least 3–5 years of industry experience and a proven track record
• Verify business licenses, export certifications, and participation in international trade shows
• Request references or case studies from existing clients, especially those in your region
• Prefer suppliers who offer factory audits or video tours to confirm production capabilities

2. Type of Gold Tester

Different gold testing technologies suit various applications. Selecting the appropriate type depends on your testing volume, required precision, and material forms (jewelry, bars, scrap, etc.).

• Manual Acid Test Kits: Cost-effective for small-scale operations; require skilled operators and can damage samples
• Electronic Conductivity (Acoustic) Testers: Fast, non-destructive testing using sound waves; ideal for jewelry stores and pawn shops
• Density-Based Testers: Use Archimedes’ principle; accurate for pure gold but less effective with alloys or plated items
• XRF (X-Ray Fluorescence) Analyzers: High-precision, non-destructive testing for professional labs and refineries; capable of detecting multiple elements and karat levels
• UV-Vis Spectrophotometers: Advanced lab-grade machines for precise alloy composition analysis

Expert Tip: For high-volume or commercial use, XRF machines are the industry standard due to their speed, accuracy, and non-destructive nature. However, they come at a higher price point and may require operator training.

3. Machine Specifications and Performance

Technical specifications directly impact testing efficiency and integration into your workflow. Evaluate the machine based on measurable performance criteria.

• Testing Speed: Ranges from 1–3 seconds (XRF) to several minutes (density tests)
• Accuracy: Look for devices with ±0.1% to ±0.5% error margin, depending on application
• Sample Size Range: Ensure the device can handle your typical item sizes (e.g., small jewelry vs. large bars)
• Digital Features: Touchscreen interfaces, data logging, Bluetooth/Wi-Fi connectivity, and report generation enhance usability
• Portability: Handheld models are ideal for field use; benchtop units offer higher precision

4. Gold Purity Assay Range

A high-quality gold tester should be capable of accurately measuring a wide range of karat values to accommodate diverse inventory.

• Ensure the machine can detect purity from 8K to 24K+ (33% to 99.9%+ gold content)
• XRF analyzers can also identify other precious metals (silver, platinum, palladium) in alloys
• Verify if the device supports custom calibration for unique alloys or regional standards
• Check whether the machine provides direct karat readout or requires manual conversion

5. Results Consistency and Reliability

Consistent and repeatable results are essential for maintaining trust and compliance in commercial transactions.

• Look for machines with built-in calibration checks and auto-diagnostic features
• Review user feedback on long-term stability and drift over time
• Request performance data such as repeatability (RSD%) and reproducibility metrics
• Test units under similar environmental conditions (temperature, humidity) as your operation
• Prefer devices with temperature compensation to reduce environmental interference

6. After-Sales Service and Support

Robust after-sales support ensures the longevity and optimal performance of your investment.

• Confirm warranty duration (typically 1–2 years for electronic testers)
• Inquire about availability of spare parts, software updates, and repair services
• Check if the supplier offers remote technical support or on-site training
• Verify language support (English or local language manuals and customer service)
• Ask about return policies, replacement timelines, and troubleshooting procedures

7. Compliance with Legal and Industry Standards

Ensure the gold testing machine meets regulatory requirements in your country to avoid legal complications.

• XRF devices should comply with CE, RoHS, and FCC standards
• In some regions, testing equipment must be certified by national metrology institutes
• Verify if the machine adheres to international standards such as ISO 11596 (for gold analysis)
• For export/import, ensure the device meets radiation safety regulations (especially for XRF units)
• Some financial institutions require auditable test logs and secure data storage

Tester Type	Best For	Accuracy	Cost Range (USD)	Key Considerations
Acid Test Kit	Small shops, low volume	Moderate (subjective)	$20 – $100	Destructive, skill-dependent
Electronic Conductivity	Jewelry stores, pawn shops	±0.3% to ±0.8%	$300 – $1,200	Non-destructive, quick results
Density Tester	Refineries, assayers	±0.2% to ±0.5%	$500 – $2,000	Requires precise weighing
XRF Analyzer (Handheld)	Labs, large dealers	±0.1% to ±0.3%	$5,000 – $15,000	High accuracy, regulatory compliance
UV-Vis Spectrophotometer	Advanced laboratories	±0.05% or better	$8,000 – $20,000+	Lab-based, complex operation

Pro Tip: Always request a sample test report or live demonstration before purchasing. Many reputable Chinese suppliers offer trial units or video demonstrations to showcase machine performance and software interface.

Final Recommendations

• Start with a clear understanding of your testing volume, accuracy needs, and budget
• Compare at least 3–5 suppliers and request detailed product specifications and certifications
• Ensure the machine comes with a user manual, calibration certificate, and software (if applicable)
• Consider future scalability—choose a model that can grow with your business
• For regulated industries, consult local authorities on acceptable testing methods and equipment standards

Investing in the right gold testing machine from China can significantly enhance your operational efficiency and credibility. By carefully evaluating suppliers, technology types, specifications, and support services, you can make an informed decision that protects your business and ensures accurate, reliable results.

Frequently Asked Questions About Gold Testing

Q1: What is the most accurate way to test gold?

The most accurate and safest method for testing gold is X-ray Fluorescence (XRF) analysis. This advanced technique uses a specialized X-ray instrument to excite the atoms in the gold sample, causing them to emit secondary (fluorescent) X-rays. These emissions are measured and analyzed to create a precise elemental fingerprint of the material.

XRF provides highly reliable data on the purity and composition of gold, including the percentage of karats (e.g., 14K, 18K, 24K), and can identify other alloying metals such as silver, copper, nickel, or zinc. Because it is non-invasive and does not alter the sample, XRF is widely used by jewelers, refineries, and laboratories for authentication and valuation.

Q2: Do gold testers work with gold-plated items?

Gold testers vary significantly in their ability to detect gold plating, and this is one of the major limitations of certain testing methods:

• Acid Testers: These only assess the surface layer and can give misleadingly positive results on thick gold-plated items, mistaking them for solid gold.
• Electronic Testers: Some digital testers may also be fooled by plating unless they have depth-sensing capabilities.
• XRF Analyzers: Advanced XRF machines can differentiate between solid gold and plated items by analyzing multiple layers beneath the surface. They detect the base metal underneath the gold coating, making them far more reliable for identifying plating.

For accurate results, especially when authenticity is critical, XRF testing is strongly recommended over surface-level methods.

Q3: How long does it take to conduct a gold test?

The duration of a gold test varies widely depending on the method used. Here's a breakdown of common techniques and their typical testing times:

Testing Method	Time Required	Key Characteristics
Acid Test	2–5 minutes	Inexpensive, portable, but destructive and less precise.
Density Test (Archimedes’ Principle)	5–10 minutes	Non-destructive; requires precise weighing and water displacement.
XRF Analysis	30 seconds – 1 minute	Non-destructive, highly accurate, provides full elemental breakdown.
Fire Assay	1–2 days	Most accurate for bulk refining; destructive and laboratory-intensive.

For quick, reliable results in retail or appraisal settings, XRF is the preferred choice due to its speed and precision.

Q4: Which is better, an acid test or XRF?

XRF analysis is vastly superior to the acid test for several important reasons:

• Non-Destructive: XRF leaves no damage on the item, preserving its appearance and value—ideal for jewelry and collectibles.
• Comprehensive Results: It identifies not just gold content but also traces of other precious or base metals in the alloy.
• Higher Accuracy: Provides quantitative results (e.g., 75.3% gold) rather than an estimated karat range.
• Safer: No hazardous acids or chemicals are involved, reducing health and environmental risks.
• Efficiency: Delivers instant results with minimal operator training.

While acid testing remains popular due to its low cost and simplicity, it is less reliable and can damage valuable items. For professional, accurate, and safe gold verification, XRF is the industry standard.

Q5: How much gold must be present for an XRF test to work?

XRF analyzers are extremely sensitive instruments capable of detecting even trace amounts of gold—as little as a few parts per million (ppm). There is no minimum weight or thickness requirement for the test to function effectively.

Whether testing a heavy gold bar, a thin chain, or a micro-coating of gold plating, XRF can accurately measure the presence and concentration of gold. However, for very small or thin samples, optimal positioning and longer scan times may be used to enhance detection accuracy.

This sensitivity makes XRF ideal not only for jewelry and bullion but also for industrial applications such as electronics recycling, where tiny quantities of gold in circuit boards need to be identified and recovered.