✦ LIBER ✦

A quantitative assay for poly(ethylene glycol) without interference by proteins

✍ Scribed by Kenneth C. Ingham; Ronald C. Ling

Book ID: 102629926
Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 411 KB
Volume: 85
Category: Article
ISSN: 0003-2697
DOI: 10.1016/0003-2697(78)90284-1

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✦ Synopsis

A method is described for the quantitative determination of poly(ethylene glycol) having an average molecular weight of 3400. The method is based on a measurement of the intensity of light which is scattered by the turbid suspension produced by addition of the polymer to Nessler's solution. Small amounts of plasma proteins (0.001 mg/ml) drastically diminished the turbidity. This interference can be eliminated by prior adsorption of the protein on Al(OH), gel.

' PEG = poly(ethylene glycol), poly(ethylene oxide), polyoxy-ethylene. Chemical formula: HOCH,CH,-(CH,CH,O),CH,CH,OH.

PEG-4000 signifies a heterogeneous mixture having an average molecular weight of 4000.

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