Title of article :
Determination of chromium(III), chromium(VI) and total chromium in chromate and trivalent chromium conversion coatings by electrospray ionization mass spectrometry
Author/Authors :
Hotta، نويسنده , , Hiroki and Yata، نويسنده , , Katsuya and Kamarudin، نويسنده , , Kamurul Fakir Bin and Kurihara، نويسنده , , Shota and Tsunoda، نويسنده , , Kin-ichi and Fukumoto، نويسنده , , Natsuo and Kojima، نويسنده , , Isao and Kinugasa، نويسنده , , Shin-ichi، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2012
Abstract :
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. 13 nmol/dm3 for CrVI and 56 nmol/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.
Keywords :
Chromium(III) , Chromium(VI) , Total chromium , Electrospray ionization mass spectrometry , Chromate and trivalent chromium conversion coatings
