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- W2093386019 abstract "Quantitative analysis of carboxylic acids in hydrophilic matrixes remains a challenge despite the introduction of derivatization reagents for carboxylic acids nearly three decades ago. Analysis of many bifunctional ester forming polymer cross-linkers are additionally complicated by the their amphiphatic character. We report a sensitive and selective HPLC method to quantify organic dicarboxylic acids resulting from the hydrolytic degradation of cross-linked carbohydrate polyesters. An important group of cross-linkers encompassing C7–C10 aromatic and non-chromophoric aliphatic diacid chlorides were investigated. Specific validation is reported for terephthalic acid, diethylmalonic acid and sebacic acid. Linear calibration curves were obtained in the 0.5–15.0 mg/ml range corresponding to a mass fraction of 0.05–1.5% diacid to polyester. The accuracy and precision in this range was 94.4–114.1 and 6.1–24.8% RSD, respectively. This method is suitable for the routine determination of the molar or mass degree of substitution in carbohydrate polyesters. q 2004 Elsevier Ltd. All rights reserved." @default.
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- W2093386019 date "2005-02-01" @default.
- W2093386019 modified "2023-10-16" @default.
- W2093386019 title "HPLC analysis of aliphatic and aromatic dicarboxylic acid cross-linkers hydrolyzed from carbohydrate polyesters for estimation of the molar degree of substitution" @default.
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- W2093386019 doi "https://doi.org/10.1016/j.carbpol.2004.10.002" @default.
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