خيارات البحث
النتائج 261 - 270 من 286
[Distribution and evolution of benthic populations in the interior part of the Gulf of Izmir under the influence of various pollutions [Turkey]]
1979
Kocatas, A.
The state and trends of faecal pollution in coastal waters along S.R. Slovenia (Yugoslavia) during 1972-74 and 1977-78 [Adriatic Sea]
1979
Lenarcic, M.
New data on the distribution of pollutants and their effect on some hyponeuston constituents in the S.E. Mediterranean
1979
El-Hehyawi, M.L.
The study of the problems of the coastal transport of pollutants in Maltese coastal waters
1979
Havard, D.A.
Levels of metal pollutants in sediments and biota of the Gulf of Trieste: a long term survey [Adriatic Sea]
1979
Majori, L. | Nedoclan, G. | Modonutti, G.B. | Daris, F.
[The effect of pollution on the localisation dynamics of benthic populations of coastal sediments in north-western Mediterranean Sea]
1979
Bellan, G. | Bellan-Santini, D. | Picard, J. (Station Marine d'Endoume, 13 - Marseille (France))
Economic impact analysis of alternative pollution control technologies | Wet process hardboard and insulation board subcategories of the timber products industry
1979
Study on component of hazardous industrial solid wastes: A report of actual investigation in Nagano prefecture [Japan]
1979
Maruyama, M. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Akaoka, T. | Yanagimachi, Y.
Chemical consituents in precipitations
1979
Satsumabayashi, H. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Sasaki, K.
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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