Extraction, Spectrophotometric and atomic Absorption Spectrophotometric Determination of Tellurium with N-Phenyl Benzohydroxamic Acid
作者:
KiritH. Desai,
YadvendraK. Agrawal,
期刊:
Analytical Letters
(Taylor Available online 1987)
卷期:
Volume 20,
issue 1
页码: 11-22
ISSN:0003-2719
年代: 1987
DOI:10.1080/00032718708082232
出版商: Taylor & Francis Group
关键词: Tellurium determination;Spectrophotometry;Atomic absortion spectrophotometry;Hydroxamic acid;Separation from selenium
数据来源: Taylor
摘要:
Solvent extraction, spectrophotometric and atomic absorption spectrophotometric determination of tellurium-(IV) in nanogram levels are described. The tellurium(IV) forms yellow colored complex with N-phenylbenzohydroxamic acid (PBHA) which is extractable into chloroform from 7 M HCI04. Te-PBHA complex has a maximum absorbance at 345 nm with the molar absorptivity 3.5 × 1041 mol−1cm−1and Sandell's sensitivity 0.00365 μg/cm2. The tellurium(IV) is also determined in the range of 0.01 – 0.08 ppm by flameless atomic absorption spectrophotometry using GEC HG 900 vapor generation accessay. Effect of molarity, reagent concentrntions, diverse ions on the extraction of tellurium complex were studied. The tellurium was determined in presence of selenium and also in standerd samples.
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