Determination of chromium(III), chromium(VI) and total chromium in chromate and trivalent chromium conversion coatings by electrospray ionization mass spectrometry

被引：13
|
作者：
Hotta, Hiroki [2 ]
Yata, Katsuya [1 ]
Bin Kamarudin, Kamurul Fakir [1 ]
Kurihara, Shota [1 ]
Tsunoda, Kin-ichi [1 ]
Fukumoto, Natsuo [3 ]
Kojima, Isao [3 ]
Kinugasa, Shin-ichi [3 ]
机构：
[1] Gunma Univ, Dept Chem & Chem Biol, Kiryu, Gunma 3768515, Japan
[2] Nara Univ Educ, Dept Chem, Takahata, Nara 6308528, Japan
[3] Natl Inst Adv Ind Sci & Technol, NMIJ, Tsukuba, Ibaraki 3058565, Japan
来源：
TALANTA | 2012年 / 88卷
关键词：
Chromium(III); Chromium(VI); Total chromium; Chromate and trivalent chromium conversion coatings; Electrospray ionization mass spectrometry; CR(VI); VI;
D O I：
10.1016/j.talanta.2011.11.028
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Developed were the determination methods of Cr-VI and Cr-III by electrospray ionization mass spectrometry, where HCrO4- (m/z 117) and [Cr-III(cydta)](-) (m/z 394) were measured, respectively. Moreover, total Cr was also determined by measuring [Cr-III(cydta)](-) after reduction of Cr-VI with ascorbic acid. Here, cydta denotes trans-1,2-diaminocyclohexane-N,N,N',N'-tetraacetic acid. The detection limits were ca. 13 nmol/dm(3) for Cr-VI and 56 nmol/dm(3) for Cr-III and total Cr. The proposed methods were applied to analyze chromate and trivalent chromium conversion coatings and gave consistent results with those obtained by a diphenylcarbazide spectrophotometric method for Cr-VI and ICP-AES for total Cr. (C) 2011 Elsevier B.V. All rights reserved.
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页码：533 / 536
页数：4
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