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
|