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  • Title: Spectrophotometric determination of ruthenium with diphenylthiovioluric acid.
    Author: Chawla RS, Singh RP, Trikha KC.
    Journal: Talanta; 1971 Dec; 18(12):1245-9. PubMed ID: 18961012.
    Abstract:
    Diphenylthiovioluric acid (DPHTVA) reacts with ruthenium(III) to form a complex which has an absorbance maximum at 520 nm. Effects of pH, heating time, buffer and reagent have been studied. DPHTVA has been found to be a sensitive reagent for ruthenium(III) (sensitivity = 0.0044 mug Ru cm (2) for log I(0)/I = 0.001), and has been made selective by the use of masking agents. The composition of the complex as revealed by different methods is 1:2 (ruthenium:DPHTVA).
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