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Rapid detection of chromium in different valence states in soil using resin selective enrichment coupled with laser-induced breakdown spectroscopy: From laboratory test to portable instruments

文献类型： 外文期刊

作者： Fu, Xinglan 1 ; Ma, Shixiang 1 ; Li, GuangLin 2 ; Guo, Lianbo 3 ; Dong, Daming 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Natl Engn Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

2.Southwest Univ, Coll Engn & Technol, 216 Tiansheng Rd, Chongqing 400716, Peoples R China

3.Huazhong Univ Sci & Technol HUST, Wuhan Natl Lab Optoelect WNLO, Wuhan 430074, Hubei, Peoples R China

关键词： Laser-induced breakdown spectroscopy; Different valence states of chromium; Soil; Resin; Selective enrichment

期刊名称：SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY （ 影响因子：3.752； 五年影响因子：3.375 ）

ISSN： 0584-8547

年卷期： 2020 年 167 卷

页码：

收录情况： SCI

摘要： Hexavalent chromium (Cr(VI)) is toxic, but trivalent chromium (Cr(III)) is essential to organisms. Monitoring Cr (VI) and Cr(III) in soil can improve our understanding of Cr biogeochemistry and toxicity. However, it is difficult to rapidly determine Cr in different valences in soil using traditional methods. A new method, resin selective enrichment with laser-induced breakdown spectroscopy, for rapidly determining Cr in different valence states (total Cr, Cr(III), and Cr(VI)) in soil is presented here. The method effectively separated Cr(III) and Cr(VI). The regression coefficients for the total Cr, Cr(III), and Cr(VI) calibration curves were all > 0.99. The total Cr and Cr (VI) limits of detection were 19.34 and 35.18 mg/kg, respectively. The total Cr and Cr(VI) relative standard deviations for repeat analyses were 7.69% and 12.98%, respectively. A portable laser induced breakdown spectroscopy instrument for detecting Cr in soil, developed in our laboratory, gave a regression coefficient for the total Cr concentration in soil of 0.993. The results indicated that the method can rapidly and accurately quantify Cr in different valence states in soil. There is potential for miniaturizing the instrument to allow Cr to be determined in soil in the field

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