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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Luo, H. Study on the colour reaction of Te-KI-RhB system in the presence of PVA-OP. Mikrochim Acta 106, 21–26 (1992). https://doi.org/10.1007/BF01242695
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DOI: https://doi.org/10.1007/BF01242695