✦ LIBER ✦

Spectrophotometric determination of chromium(VI) by extraction of protriptylinium dichromate

✍ Scribed by D.Thorburn Burns; M.Deirdre Dunford

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 252 KB
Volume: 319
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(95)00474-2

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✦ Synopsis

Chromium(V1) (< 500 pg dichromate) can be determined spectrophotometrically at 365 nm after its extraction as protriptylinium dichromate into acetone-chloroform (l:l, v/v). The effects of acidity, diverse ions and masking studies are reported. The relative standard deviation for determination of 200 pg of dichromate is 0.9% (n = 7). The system has been applied to the spectrophotometric determination of chromium in steels (0.03-4%).

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