Abstract
A simple and selective method for the determination of S-sulfo group has been developed. The principle of this method is as follows: S-sulfo group is reduced by dithiothreitol to thiol and sulfite; the latter is converted to sulfur dioxide by acidification and absorbed to monoethanolamine solution by aeration. Then an adduct is prepared by the reaction of sulfite with p-aminoazobenzene and formaldehyde and determined colorimetrically by high performance liquid chromatography. Calibration curves for S-sulfonates were linear in the range of 2.5 to 100 ώM. The present method permitted the determination of S-sulfo group in normal rabbit plasma in the range of 23.3 to 47.3 ώM.
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Togawa, T., Akiyama, Y., Kaneko, K. et al. Determination of S-Suifo Group in Rabbit Plasma. ANAL. SCI. 2, 477–480 (1986). https://doi.org/10.2116/analsci.2.477
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DOI: https://doi.org/10.2116/analsci.2.477