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Determination of sulphated glycosaminoglycans by automated potentiometric titration with simple coated-wire electrodes

✍ Scribed by Jiří Dohnal; Karel Vytřas; Zdeněk Roubal; Ivana Zemanová

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 419 KB
Volume: 7
Category: Article
ISSN: 0731-7085
DOI: 10.1016/0731-7085(89)80003-2

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✦ Synopsis

A method for the determination of sulphated glycosaminoglycans is based on their precipitation with (1-ethoxycarbonyl)pentadecyltrimethylammonium bromide (Septonex), the excess of which is back-titrated with sodium tetraphenylborate. The titration is monitored by a simple coated-wire ion-selective electrode with a plasticized poly(vinyl chloride) membrane on aluminium wire. Under certain conditions the results are almost independent of the relative molecular mass of glycosaminoglycans. The method has been applied to the determination of the active ingredient in the pharmaceutical preparation, heparon injection.

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