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

被引：14

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.

引用

页码：533 / 536

页数：4

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