A New Spectrophotometric Method for Determination of Vitamin B12as Cobalts
作者:
P. Bruno,
期刊:
Analytical Letters
(Taylor Available online 1981)
卷期:
Volume 14,
issue 17-18
页码: 1493-1500
ISSN:0003-2719
年代: 1981
DOI:10.1080/00032718108081475
出版商: Taylor & Francis Group
关键词: Vitamin B12;Hexamethylphosphoramide (HMPA);Cobalt complex;Spectrophotometry
数据来源: Taylor
摘要:
A spectrophotometric method for determination of Vitamin B12(Cyanocobalamin) as cobalt in pharmaceutical preparations is described. The sample is first decomposed by concentrated sulfuric and nitric acids and the dry residue is solubilized in distilled water. The cobalt present is then spectrophotometrically determined at Λ= 317 nm as Co-HMPA-SCN complex. The complex is stable for a long time in the range of pH 3–10. The presence of many other metal cations does not interfere.
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