Construction of chromium valence analysis kit in water based on surface-enhanced Raman scattering technology

Abstract

Abstract: Objective Chromium mainly exists in trivalent chromium[Cr（III）] and hexavalent chromium[Cr（VI）],among which Cr（VI） can have serious negative impacts on ecosystems and exposed populations. This study is based on surface-enhanced Raman scattering（SERS） technology to construct a rapid qualitative and quantitative detection kit for the valence of chromium in water. Methods Nano silver colloidal solution was prepared by chemical synthesis as the SERS active substrate,and a portable Raman spectrometer was used as the detection platform to achieve fast reading analysis of chromium valence states in water and on-site rapid quantitative detection of Cr（VI）,which were integrated into a portable reagent kit. Improve sensitivity by optimizing experimental conditions such as the type of coagulation salt and coagulation time. Results The reagent kit constructed in this study could quickly distinguish between Cr（III） and Cr（VI）,and the linear range for detecting Cr（VI） was 2 μg/L to 20 mg/L （R²=0.997）,with a detection limit as low as 0.73 μg/L,a recovery rate of 90.37% to 97.56%,demonstrating excellent reproducibility. Conclusion Compared with traditional methods,the chromium valence state analysis kit constructed in this study is low-cost,easy to operate,and suitable for rapid on-site detection.

Key words: Surface-enhanced Raman scattering, Chromium, Valence analysis, Portable kit

CLC Number:

R115

NING Qiong, SONG Liqun, ZHANG Wei, QIN Zhanxia, WANG Cuijuan. Construction of chromium valence analysis kit in water based on surface-enhanced Raman scattering technology. [J]OCCUPATION AND HEALTH, 2024, 40(16): 2188-2192.

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