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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 ProvinceAustralia
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