Document ID (ISN) | 60878 |
CIS number |
93-1620 |
ISSN - Serial title |
0105-1873 - Contact Dermatitis |
Year |
1993 |
Convention or series no. |
|
Author(s) |
Tandon R., Aarts B. |
Title |
Chromium, nickel and cobalt contents of some Australian cements |
Bibliographic information |
Apr. 1993, Vol.28, No.4, p.201-205. 17 ref. |
Abstract |
The total chromium, nickel and cobalt concentrations of 8 Australian Portland cements ranged from 49 to 99µg/g, 5 to 54µg/g and ≤1 to 13µg/g, respectively. The water-soluble chromate concentrations of the cements ranged from 0.2 to 8.1µg/g, and the sodium sulfate-extractable chromates form 1.4 to 9.7µg/g. Results for water-soluble nickel (≤0.2µg/g) and cobalt (≤0.05µg/g) indicate that the metals are present only as water-insoluble compounds. The significance of the various data is considered from a dermatological point of view. Cement extracts for the analysis of water-soluble hexavalent chromium (chromates) are stable for at least 12 days. The optimum extraction time for hexavalent chromium in cement appears to be 1h. Almost 100% reduction of hexavalent chromium is possible after 1h using 100 x the stoichiometric value of iron (II) sulfate. The chromates can become gradually insolubilised when the solution from the water added is in direct contact with the cement, i.e., over a period of >60min to 7 days, even without the addition of iron (II) sulfate. |
Descriptors (primary) |
cobalt; skin allergies; cement; chromates; chromium sulfate; cement dermatitis; nickel |
Descriptors (secondary) |
Australia; chromium; chromium sulfide; occupational diseases |
Document type |
D - Periodical articles |
Country / State or Province | Australia |
Subject(s) |
Toxic and dangerous substances
|
Broad subject area(s) |
Chemical safety
|
Browse category(ies) |
Skin diseases Allergies Inorganic sulfur compounds Nickel and compounds Cement and concrete Inorganic substances
|