Determination of chromium(III), chromium(VI) and total chromium in chromate and trivalent chromium conversion coatings by electrospray ionization mass spectrometry
► Electrospray ionization mass spectrometry was for the first time applied to determine trace amounts of chromium(III), chromium(VI) and total Chromium. ► The method is highly sensitive and selective. ► It was successfully applied to analyze chromate and trivalent chromium conversion coatings. Devel...
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Published in | Talanta (Oxford) Vol. 88; pp. 533 - 536 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
15.01.2012
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | ► Electrospray ionization mass spectrometry was for the first time applied to determine trace amounts of chromium(III), chromium(VI) and total Chromium. ► The method is highly sensitive and selective. ► It was successfully applied to analyze chromate and trivalent chromium conversion coatings.
Developed were the determination methods of CrVI and CrIII by electrospray ionization mass spectrometry, where HCrO4− (m/z 117) and [CrIII(cydta)]− (m/z 394) were measured, respectively. Moreover, total Cr was also determined by measuring [CrIII(cydta)]− after reduction of CrVI with ascorbic acid. Here, cydta denotes trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid. The detection limits were ca. 13nmol/dm3 for CrVI and 56nmol/dm3 for CrIII 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 CrVI and ICP-AES for total Cr. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 0039-9140 1873-3573 |
DOI: | 10.1016/j.talanta.2011.11.028 |