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Document ID (ISN)36599
CIS number 81-1951
ISSN - Serial title 0355-3140 - Scandinavian Journal of Work, Environment and Health
Year 1981
Convention or series no.
Author(s) Carelli G., La Bua R., Rimatori V., Porcelli D., Iannaccone A.
Title Interferences in the spectrophotometric S-diphenylcarbazide determination of environmental hexavalent chromium in a chromium and zinc plating plant
Bibliographic information Mar. 1981, Vol.7, No.1, p.56-61. 8 ref.
Abstract The atmospheric particulate in a chromium (Cr) and zinc plating plant was collected on glass wool filters and using an electrostatic sampler. The hexavalent Cr (Cr(VI)) was extracted with both 1.4% sulfuric acid and 7% sodium carbonate solutions and then determined by the S-diphenylcarbazide method. Strong interference was observed after extraction in the acid medium. Alkaline extraction permitted 95 ± 6% recovery of the total Cr and was suitable in releasing Cr(VI). The alkaline samples were analysed using the standard addition method to compensate for depressive interference of 26 ± 8%. The absorbance of the Cr-S-diphenylcarbazide complex decreases with time, and measurements must be made within a few minutes of reagent addition.
Descriptors (primary) electroplating; chromium; determination in air
Descriptors (secondary) exposure evaluation; absorption spectrometry; chemical analysis; description of technique
Document type D - Periodical articles
Subject(s) Toxic and dangerous substances
Broad subject area(s)
Browse category(ies) Surface treatment
Inorganic substances