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The purpose of this paper is to outline some of the testing procedures which can be used, the data which should be obtained from them, and the way in which such data can be used in hazard assessment

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Food and Agriculture Organization of the United Nations - Italy

Fertilizer industry

1979

Sittig, Marshall

fertilizer industry energy conservation environmental aspects

National Agricultural Library - United States of America

Atomic absorption spectrophotometric determination of cadmium, copper, lead in organic matter with high molecular weight amine extraction

1979

Matsuzawa, K. (Nagano-ken. Research Inst. for Health and Pollution (Japan))

As high molecular weight amine were able to extract trace cadmium, copper and lead Into an organic phase at the potassium iodide-sulfuric acid, simultaneously, conditions for determination directly organic phase with atomic absorption spectrophotometry were investigated. By setting potassium iodide concentration and sulfuric acid concentration at 0.2M and 3.6 N, respectively, cadmium, copper and lead were extracted with 5v/v% Amberlite LA-2-n-Buthyl acetate solution simultaneously. Under the conditions above described, the extraction rate of cadmium, copper were 100% and its of lead was 98%. The coefficient of variation were proved to be 0.71%, 1.47%, 1. 30%; which were obtained by the 20 repeats of determination with 1 micro g/ml cadmium, copper solution and 5 micro g/ml lead solution With regard to the effect of coexisting ions, alkaline metals, alkaline earths metals, Fe(II), Zn(II), Al(II), Mn(II), Cr(IV), Si(IV), Ni(II), As(III) etc. did not interfere. The method was applied to the determination of cadmium, copper and lead in hair with satisfactory results.

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mankind analytical methods copper hair cadmium lead ...

The Agriculture, Forestry and Fisheries Research Information Technology Center - Japan