Gold Metal Testing Using Energy Dispersive X-ray Fluorescence Spectroscopy: A Study on the LISUN EDX-2 RoHS Testing Equipment

Abstract

Energy Dispersive X-ray Fluorescence (EDXRF) spectroscopy is a widely used non-destructive analytical technique for the detection and quantification of elements in various materials. This paper explores the application of EDXRF for gold metal testing, focusing on the LISUN EDX-2 RoHS Testing Equipment, a gold metal tester used for precise element analysis and thickness gauging. We examine the principles of EDXRF, its advantages in gold purity analysis, and the capabilities of the LISUN EDX-2 system for gold testing. The paper includes a detailed breakdown of the instrument’s specifications and its performance for testing gold samples.

1. Introduction

Gold metal testing is critical in various industries, including jewelry manufacturing, mining, and recycling, to ensure the purity and quality of gold products. Traditionally, gold testing has involved destructive methods such as fire assay or wet chemical analysis. However, modern technological advancements, particularly in X-ray fluorescence (XRF) spectroscopy, have provided an alternative that is both non-destructive and efficient. This paper investigates Energy Dispersive X-ray Fluorescence (EDXRF) spectroscopy and its application in gold metal testing, particularly through the use of the LISUN EDX-2 RoHS Testing Equipment, a cutting-edge instrument capable of element analysis and gold purity measurement.

2. The Principle of EDXRF Spectroscopy

Energy Dispersive X-ray Fluorescence (EDXRF) spectroscopy is a technique that involves irradiating a sample with X-rays, causing the atoms in the sample to become excited and emit secondary X-rays. These emitted X-rays, known as fluorescence, are characteristic of the elements present in the sample. By measuring the energy and intensity of these fluorescent X-rays, the EDXRF instrument can identify and quantify the elements in the sample.

The key components of an EDXRF system include:

• X-ray Source: Provides the primary X-rays to excite the sample.
• Detector: Measures the emitted X-rays and converts them into an electrical signal.
• Multichannel Analyzer: Analyzes the energy levels of the detected X-rays and generates a spectrum.
• Data Processing Unit: Processes the spectral data to identify and quantify the elements in the sample.

EDXRF is capable of detecting a wide range of elements, from sodium to uranium, and provides a detailed elemental profile of the sample without the need for sample destruction.

3. The Role of EDXRF in Gold Metal Testing

Gold purity is one of the most critical aspects in determining the value and quality of gold products. Traditional gold testing methods, such as fire assay, are time-consuming and involve destructive processes. EDXRF offers a non-destructive, fast, and accurate method for gold purity analysis. This makes it an ideal solution for jewelers, metal traders, and testing laboratories.

EDXRF allows for the analysis of gold alloys, identifying not only the presence of gold but also other metals such as silver, copper, and platinum that may be present in the alloy. By measuring the relative concentrations of these elements, the purity of the gold can be determined. EDXRF also provides rapid results, enabling fast decision-making for businesses involved in gold trading or refining.

The ability to perform gold testing without altering the sample’s integrity is one of the significant advantages of EDXRF. Additionally, EDXRF can analyze samples with minimal preparation, further enhancing its efficiency.

4. Overview of LISUN EDX-2 RoHS Testing Equipment

The LISUN EDX-2 is a high-performance Energy Dispersive X-ray Fluorescence (EDXRF) spectrometer designed for elemental analysis and thickness gauging. While originally developed for RoHS (Restriction of Hazardous Substances) testing, the LISUN EDX-2 is highly versatile and capable of testing a broad range of materials, including precious metals such as gold.

The LISUN EDX-2 features an advanced Si-PIN or SDD detector, which provides high resolution and sensitivity, making it suitable for trace element detection and precise gold purity measurement. The instrument operates in both air and vacuum modes, offering flexibility in testing different types of samples.

4.1 Specifications of LISUN EDX-2

The following table summarizes the key specifications of the LISUN EDX-2 system:

Specification	EDX-2A	EDX-2AC	EDX-2AB	EDX-2ABC	EDX-2T
Type	Non-pumping air desktop	Non-pumping air desktop	Vacuum desktop	Vacuum desktop	Vacuum desktop
Weight	50 kg	50 kg	55 kg	55 kg	55 kg
Test Time	200 s	200 s	100 s	100 s	100 s
Sample Cavity Size (L×W×H)	610×320×100 mm	610×320×100 mm	510×310×120 mm (Non-vacuum)	510×310×120 mm (Non-vacuum)	510×310×120 mm (Non-vacuum)
Test Environment	Atmosphere	Atmosphere	Vacuum	Vacuum	Vacuum
Detector	Si-PIN	Si-PIN	SDD	SDD	SDD
Resolution	149 eV	149 eV	129 eV	129 eV	129 eV
Output Tube Pressure/Current	50 kV/600 µA (Auto-set)	50 kV/600 µA (Auto-set)	50 kV/600 µA (Auto-set)	50 kV/600 µA (Auto-set)	50 kV/600 µA (Auto-set)
Sample Types	Solid, liquid, powder	Solid, liquid, powder	Solid, liquid, powder (Non-vacuum); Solid (Vacuum)	Solid, liquid, powder (Non-vacuum); Solid (Vacuum)	Solid, liquid, powder (Non-vacuum); Solid (Vacuum)
Content Analysis Range	2 ppm–99.99%	2 ppm–99.99%	2 ppm–99.99%	2 ppm–99.99%	2 ppm–99.99%

4.2 Performance of LISUN EDX-2 for Gold Testing

The LISUN EDX-2 has been specifically designed for applications requiring high precision and accuracy in elemental analysis. For gold testing, it is equipped with advanced features such as high-resolution detectors, rapid sample analysis, and customizable software for result processing.

By utilizing the vacuum mode for high-precision measurements, the LISUN EDX-2 minimizes interference from air and environmental factors, providing more accurate readings for gold and other precious metals. Furthermore, its ability to handle a wide range of sample types and its automatic calibration ensure reliable results even with complex alloy samples.

5. Conclusion

The LISUN EDX-2 RoHS Testing Equipment is a versatile and powerful tool for gold metal testing. With its advanced EDXRF technology, it provides accurate and non-destructive analysis of gold purity, enabling quick and reliable results. The high sensitivity, flexible testing modes, and ease of use make it an ideal choice for gold testing in various industries. As a gold metal tester, the LISUN EDX-2 offers a significant improvement over traditional testing methods, making it an essential instrument for businesses involved in gold refining, trading, and quality assurance.

By leveraging the capabilities of EDXRF, users can achieve highly accurate and efficient gold testing, ensuring quality and compliance with industry standards. The continued development of EDXRF technology promises even greater advancements in the future of gold metal analysis.

Tags：EDX-2