Determination of Zirconium and Titanium in Marine Placer Deposits by ICP-OES with Alkali Fusion of Lithium Metaborate-Lithium Tetraborate Composite Flux

ZHANG Yijun; ZHANG Yuhang; CHEN Yan; DENG Yan; WANG Jiahan

doi:10.15898/j.ykcs.202409110188

Rock and Mineral Analysis > 2024 > 43(6): 858-865. > DOI: 10.15898/j.ykcs.202409110188

ZHANG Yijun，ZHANG Yuhang，CHEN Yan，et al. Determination of Zirconium and Titanium in Marine Placer Deposits by ICP-OES with Alkali Fusion of Lithium Metaborate-Lithium Tetraborate Composite Flux[J]. Rock and Mineral Analysis，2024，43（6）：858−865. DOI: 10.15898/j.ykcs.202409110188

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Determination of Zirconium and Titanium in Marine Placer Deposits by ICP-OES with Alkali Fusion of Lithium Metaborate-Lithium Tetraborate Composite Flux

Haikou Key Laboratory of Marine Contaminants Monitoring Innovation and Application; Haikou Marine Geological Survey Center, China Geological Survey, Haikou 571127, China

More Information

Received Date: September 10, 2024
Revised Date: October 25, 2024
Accepted Date: October 31, 2024
Available Online: November 29, 2024
Published Date: November 29, 2024

Abstract

HIGHLIGHTS
(1) Compared with other single flux, the melting effect of lithium metaborate - lithium tetraborate composite flux is better, and more widely used.

(2) The operation process of the alkali fusion method is simplified, and the technology for dissolving molten substances is improved.

(3) The alkali fusion method is in accordance with the results obtained by the closed acid dissolution method, and the process is more convenient.

ABSTRACT

The marine placer deposits of Hainan Island contain abundant zirconium (Zr) and titanium (Ti) resources, which hold significant development potential. An alkali fusion-inductively coupled plasma-optical emission spectrometry method based on a composite flux of lithium metaborate and lithium tetraborate (m∶m=33∶67) was developed for determining Zr and Ti in marine placers. In this method, the sample was fused with 0.8g flux at 1000℃ for 15min. After cooling, the molten substance was poured into a dilute acid and dissolved by oscillation in a constant temperature oscillator. This approach simplifies the operation process by avoiding the complexity associated with high-temperature procedures while enhancing melt dissolution techniques. The detection limit for Zr in this method is 0.40μg/g while that for TiO₂ is 0.0025%. Based on standard materials, the relative standard deviation (RSD) of Zr ranges between 1.0%−3.5%; RSD of TiO₂ ranges between 0.7%−3.3%. These precision values align with quality management standards set forth by geological and mineral laboratory testing. The method is suitable for rapid continuous analysis of Zr and Ti in marine placer deposits.

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Determination of Zirconium and Titanium in Marine Placer Deposits by ICP-OES with Alkali Fusion of Lithium Metaborate-Lithium Tetraborate Composite Flux