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M. Timotheou-Potamia E.G. Sarantonis A.C. Calokerinos T.P. Hadjiioannou 《Analytica chimica acta》1985
A kinetic method is described for the determination of thyroxine (0.4–4 μg ml?1), based on its catalytic effect on the reduction of cerium(IV) by arsenic(III). The reaction is monitored potentiometrically; the time required for a 20-mV change in potential is inversely proportional to the thyroxine concentration. The method is applicable to tablets. 相似文献
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Aristotelis B. Syropoulos Evangelos G. Sarantonis Antony C. Calorkerinos 《Analytica chimica acta》1990
The chemiluminescent oxidation of sulphite by bromate was investigated and compared with that by cerium(IV). The reaction is sensitized by various steroid hormones which can thus be determined in the ranges 0.50–20.0μg ml 1 for cortisone; 0.50–5.00 μg ml?1 for hydrocortisone and progesterone and 0.50–6.00 μg ml?1 for testosterone and corticosterone. 相似文献
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Iron(II) (1.0 × 10?9–1.0 × 10?6 M) is determined by the production of chemiluminescence in a luminol system in the absence of added oxidant. Iron(III) (2.0 × 10.8?8–2.0 × 10?6 M) is determined after reduction to iron(II) in a silver reductor mini-column in the flow system. Cobalt, chromium, copper and manganese interfere. 相似文献
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