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| Determination of low-grade gold in gold-ore powders by Energy dispersive X-ray fluorescence spectroscopy Based on Voigt function fitting |
| Received:March 05, 2024 Revised:April 02, 2024 |
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| DOI：10.3969/j.issn.2095-1035.2024.12.015 |
| KeyWord:Gold mine powder; energy dispersion X-ray fluorescence spectrum; overlapping peak decomposition; Voigt function |
| Author | Institution |
| GuanCongrong |
北方工业大学,电气与控制工程学院 |
| ZhangShuai |
北方工业大学,电气与控制工程学院 |
| HeChuanhui |
北方工业大学,电气与控制工程学院 |
| ChenJiwen |
北方工业大学,电气与控制工程学院 |
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| Abstract: |
| To improve the accuracy and safety of gold content detection in gold-ore powder, The study focuses on gold powder and uses energy dispersive X-ray fluorescence spectroscopy (EDXRF) to detect the gold-ore powders. The Voigt function is used to fit and separate the Lα-Peak of gold element. The characteristic peak of pure elements is used to analyze and determine the content of gold in gold-ore powders. In the experiment, we separated Lα-Peak of gold and Kβ-Peak of Zinc There is obvious overlap in the peaks. In order to eliminate the interference of zinc elements, we introduce noise reduction technology and Voigt function for peak separation. We use a standard solution of pure zinc and pure gold to prepare a mixed solution that meets the four ratios of zinc and gold in gold powder samples. Through filtering and noise reduction algorithms, we obtain relatively pure overlapping peaks. We add Voigt function to fit and separate the overlapping peaks of zinc and gold, and obtain the Lα of aurum. The peak net intensity value was obtained by establishing a regression line using pure gold and pure zinc standard solutions to obtain the true content of gold in gold-ore powders. Compared with the reference content data of samples, the deviation degree was less than 10%, and the deviation value was less than 2% if the content was greater than 3g/t. Combined with the non-destructive characteristics of the EDXRF method for detecting samples, the safety, accuracy, and reliability of gold content detection in gold-ore powders were improved. |
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