Study on the colour reaction of Te-KI-RhB system in the presence of PVA-OP |
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Authors: | Hongshan Luo |
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Affiliation: | (1) Department of Chemistry, Shanghai Normal University, 10 Gui Lin Road, Shanghai, People's Republic of China |
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Abstract: | A new supersensitive spectrophotometric method for the determination of tellurium (IV) has been developed which is based on the formation of an ion-association complex with potassium iodide and rhodamine B (RhB) in the presence of polyvinyl alcohol (PVA) and polyethylene glycol octyl phenyl ether (OP). The molar absorptivity at 560 nm is 2.8 × 106 1 mol–1 cm–1. Beer's law is obeyed over the range of 20–70 ng/ml Te. The method has been applied successfully to determine tellurium in alloy, steel and some other samples. |
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Keywords: | tellurium ion-association spectrophotometry mixed solubilizer |
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