Уточнить поиск
Результаты 211-220 из 286
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.
Показать больше [+] Меньше [-][Effects of the urban sewage outfall of Cortiou (Marseille) on phytoplankton [Mediterranean Sea, France]]
1979
Utilization of concentrating organisms (Mytilus galloprovincialis Lmk) for the survey and control of marine pollution
1979
Majori, L. | Nedoclan, G. | Modonutti, G.B. | Daris, F.
Investigation on some physico-chemical aspects of distribution of pollutants at the sea water/air and the sea water/sediment interface
1979
Pravdic, V. | Juracic, M. | Dragcevic, D.
Accumulation and distribution of heavy metals in some marine organisms in the Bay of Izmir and in Aegean coasts [Turkey]
1979
Uysal, H.
Mediterranean rivers as sources of trace metals in coastal waters
1979
Oregioni, B. | Huynh-Ngoc, L. | Fukai, R.
[Observations on chemical and microbial pollution of Gulf of Salonica during 1968-1978 [Greece]]
1979
Edipides, T.A. | Stathopoulos, G. | Grigoriadou-Edipides, A. | Delidou, K.
National programme in the field of marine pollution monitoring and research [in the Mediterranean Sea] (Malta)
1979
Saliba, L.J.
[Effects of pollution by an urban sewage outfall (Cortiou-Marseille) on the zooplankton of a neritic area [Mediterranean Sea, France]]
1979
