Resumo
The author proposed a new modification on the thiocyanate-stannous chloride method for the determination of molibdenum, when is used a heavier-than-water solvent for extrating the colored molybdenum thiocyanate complex. Carbon tetrachloride - butyl alcohol is the mixture proposed, and the results obtained give a good precision and more sensibility than the other method that use carbon tetrachloride-isoamyl alcohol as extractant.
Sôbre uma modificação na determinação do Molibdênio em Plantas* * Trabalho executado com fundos fornecidos pela Fundação de Amparo à Pesquisa do Estado de S. Paulo.
N. A. de Glória
Escola Superior de Agricultura «Luiz de Queiroz»
SUMMARY
The author proposed a new modification on the thiocyanate-stannous chloride method for the determination of molibdenum, when is used a heavier-than-water solvent for extrating the colored molybdenum thiocyanate complex. Carbon tetrachloride - butyl alcohol is the mixture proposed, and the results obtained give a good precision and more sensibility than the other method that use carbon tetrachloride-isoamyl alcohol as extractant.
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Full text available only in PDF format.
LITERATURA CITADA
Recebido para publicação em 15/12/62.
- CROUTHAMEL, C. E. & O. E. JOHNSON, -954 - Thiocyanate Spectrophotometric Determination of Molybdenum and Tungsten. Anal. Chemistry 26, 1284 - 1291.
- DICK, A. T. & J. B. BINGLEY, 1946 - Molybdenum-Thiocyanate Complex Nature 158, 516-517.
- HURD, L. C. & H. O. ALLEN, 1935 - Colorimetric Determination of Molybdenum. Ind. Eng. Chem. Anal. Ed. 7: 396-389.
- JOHNSON, C. M. & A. ULRICH, 1959 - Analytical Methods for use in plant tissues. Anal. Chemistry 26: 572-573.
- SANDELL, E. B., 1959 - Colorimetric Determination of traces of metals. New York, Interscience Publishers Inc. 3rd ed. 1032 pp.
- SCAIFE, J. F., 1956 - Colorimetric Microestimation of Molybdenum as Thiocynate Complex. Anal. Chem. 28, 1636.
Datas de Publicação
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Publicação nesta coleção
06 Set 2012 -
Data do Fascículo
1963
