Determination of Harmful Elements in Flotation Products of a Gold Mine by ICP-MS with the Matrix-Matching Method

LIU Qirong; CHU Bu; CHEN Shuhang; JIA Xiaoxu; ZHANG Zhihang; XIE Weining; WANG Shuai; FENG Peizhong

doi:10.15898/j.ykcs.202405230118

Rock and Mineral Analysis > 2024 > 43(6): 957-966. > DOI: 10.15898/j.ykcs.202405230118

LIU Qirong，CHU Bu，CHEN Shuhang，et al. Determination of Harmful Elements in Flotation Products of a Gold Mine by ICP-MS with the Matrix-Matching Method[J]. Rock and Mineral Analysis，2024，43（6）：957−966. DOI: 10.15898/j.ykcs.202405230118

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Determination of Harmful Elements in Flotation Products of a Gold Mine by ICP-MS with the Matrix-Matching Method

1.
School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, China
2.
School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
3.
Advanced Analyses & Computation Center, China University of Mining and Technology, Xuzhou 221116, China
4.
School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China

More Information

Received Date: May 22, 2024
Revised Date: September 30, 2024
Accepted Date: October 15, 2024
Available Online: November 12, 2024
Published Date: November 12, 2024

Abstract

HIGHLIGHTS
(1) Solution concentration and types of maxtrix elements show little effect on the determination of trace harmful elements.

(2) RSDs of quantitative results of harmful elements in gold ore flotation samples using different types of matrix elements and pure reagent harmful element standard solutions were less than 8%. Internal standard recovery rate of the matrix matching method was relatively stable, with an average difference of 24.07% lower than that of the non-matrix matching test.

(3) Spiked recovery rates of harmful elements in gold flotation samples using ICP-MS method with matrix matching were 92.08%−106.65%, and RSDs of determination results of parallel experiments were less than 5%.

ABSTRACT

For the quantification analysis of harmful elements (such as Ni, Cu, Cd and Pb), which may have the same grade or high content as gold, the complex matrix of gold ore can produce inhibitory effects, weaken the ionization rate and signal response, and show a negative effect on measurement results. In the work described here, inductively coupled plasma-mass spectrometry (ICP-MS) with matrix-matching was applied. Compared with the standard solution of harmful elements with pure reagent, a standard solution of harmful elements in a complex matrix reduced the difference in the matrix when the solution of the sample was dissolved. The accurate determination of harmful elements was achieved with the calibration of non mass spectrometry interference by the internal standard solution and matrix-matching. Main matrix elements of each flotation product of gold ore were determined by the mineralogical analysis, and sample dissolution was conducted by the microwave digestion with HCl-HNO₃-HF. Recovery rate of 10μg/L harmful element were 90%−110% in 500μg/mL and 1000μg/mL matrix solution of single and multiple types of matrix elements. Quantitative deviation of harmful elements in flotation samples of various matrix types was less than 20%, which was measured by harmful elements standard solution with single and two types of matrix elements of 1000μg/mL. Hence, the harmful element standard solution with the Fe-S matrix was applied for the determination of harmful elements in flotation products of gold ore. For the spiked recovery experiment of representative samples measured by the standard solution, the elemental spiked recovery rate ranged from 92.08% to 106.65%. Six parallel tests were conducted on representative samples, and the relative standard deviation (RSD) of each element was 1.21%−4.69%. ICP-MS with matrix matching method is suitable for quantification determination of harmful elements in flotation samples of gold ore.
- ICP-MS,
- gold ore floatation product,
- substrate matching,
- quantitative analysis,
- harmful elements

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References (24)

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