Elemental Analysis of Gold Samples Using the LISUN EDX-2A RoHS Testing Equipment – Energy Dispersive X-ray Fluorescence (EDXRF) Spectroscopy

Abstract
This paper explores the use of the LISUN EDX-2A RoHS Testing Equipment in performing elemental analysis on gold samples. EDXRF technology, as employed by the EDX-2A, enables non-destructive testing by analyzing the characteristic X-ray wavelengths emitted by elements present in a sample. By assessing the spectral intensities, this method provides accurate elemental composition and quantification of gold and associated alloy components. This paper discusses the principles of EDXRF, the operational methodology of the EDX-2A, and presents findings on gold purity and elemental analysis.

Introduction
With the growing demand for high-purity gold in jewelry, electronics, and industrial applications, accurate and efficient elemental analysis has become critical. Energy Dispersive X-ray Fluorescence (EDXRF) spectroscopy provides a non-destructive means of analyzing the elemental composition of metal samples, especially precious metals like gold. The LISUN EDX-2A RoHS Testing Equipment is specifically designed to provide precise and fast elemental quantification. This study uses the EDX-2A to analyze several gold samples, offering insights into their purity and alloy content.

Principles of EDXRF Spectroscopy
EDXRF spectroscopy functions by exciting the sample with X-rays, causing elements within the sample to emit characteristic secondary X-rays or “fluorescence.” Each element emits X-rays at unique wavelengths, creating a spectral “fingerprint” that allows identification and quantification of each constituent element. By measuring the intensity of these characteristic wavelengths, EDXRF can determine the elemental composition and concentration within the sample.

Instrument Overview: LISUN EDX-2A RoHS Testing Equipment
The LISUN EDX-2A uses advanced EDXRF technology to perform precise, non-invasive elemental analysis. Key features include:
• High-sensitivity detectors: Provide accurate measurements of spectral intensity, critical for analyzing elements at trace levels.
• Automated calibration: Ensures consistent accuracy across samples and minimal human error.
• Wide element range detection: Capable of identifying elements from sulfur to uranium, making it suitable for comprehensive metal analysis.
The EDX-2A’s setup is straightforward, involving placement of the sample in the testing chamber, initiation of the automated calibration sequence, and collection of X-ray fluorescence data.

Experimental Setup
To evaluate the EDX-2A’s capabilities, we tested three different gold samples with known compositions. Each sample was placed in the test chamber, calibrated, and analyzed under identical parameters. The primary data metrics collected included X-ray wavelengths and intensity spectra, which were then used to identify and quantify the elemental composition.

Results and Discussion
Data collected from the EDX-2A testing was analyzed for each sample, focusing on spectral intensity and corresponding elemental peaks. Table 1 provides a summary of the elemental compositions observed.

Table 1: Elemental Composition Analysis of Gold Samples Using LISUN EDX-2A

Sample ID	Gold (Au) Content (%)	Silver (Ag) Content (%)	Copper (Cu) Content (%)	Other Elements (%)
Sample 1	99.7	0.2	0.1	–
Sample 2	75.2	15	9.7	0.1
Sample 3	58.5	22.3	19	0.2

Gold Content and Purity Analysis
The analysis demonstrated that Sample 1 was nearly pure gold, with minimal silver and copper impurities. Samples 2 and 3, however, exhibited a significant presence of silver and copper, indicating they were gold alloys. The EDX-2A’s spectral resolution provided accurate detection of these alloy elements, allowing for precise determination of gold content.

Alloy Component Analysis
• Sample 2 was an 18K gold sample with approximately 75% gold, along with silver and copper as primary alloying elements.
• Sample 3 corresponded to a 14K gold alloy, characterized by a higher proportion of copper and silver.
5.3 Trace Element Detection
The EDX-2A also demonstrated its sensitivity by detecting trace elements in very low quantities. For both Sample 2 and Sample 3, elements like palladium and zinc, present in negligible amounts, were successfully identified, underscoring the instrument’s accuracy and utility in detecting even trace impurities.

Conclusion
The LISUN EDX-2A RoHS Testing Equipment proved to be highly effective in analyzing and quantifying gold and alloy compositions. Through EDXRF technology, the EDX-2A efficiently measured the elemental content of gold samples with excellent precision. For industries requiring gold quality verification, such as jewelry, electronics, and finance, the EDX-2A provides a robust solution for verifying the authenticity and purity of gold.

This study demonstrates that EDXRF, as employed in the LISUN EDX-2A, is a valuable tool in elemental analysis, especially for applications demanding non-destructive testing. The ability to analyze metals and alloys quickly and accurately positions the EDX-2A as an essential instrument for elemental verification and alloy identification.

Tags：EDX-2A