サイズ排除クロマトグラフィーによる高分子平均分子量共同測定 : VII.第4回ラウンドロビンテスト結果報告(その1) サイズ排除クロマトグラフィーによる高分子平均分子量の共同測定(第7報)

概要

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Molecular weight averages of polystyrene (PS) samples (SRM 706,SRM 705a, and PS-1) were determined at 24 laboratories belonging to the section of special study on SEC, using two sets of PS calibration standards commercially available at Tosoh (TSK) and Showa Denko (Shodex) companies. The PS-1 sample was used in the last three round robin tests. The sample concentrations, injection volume and other experimental conditions were prescribed as at the 2nd round robin test. Two calibration curves were constructed using TSK standards and Shodex standards, respectively. Molecular weight averages of the three samples calculated using the Shodex calibration curve were 3 to 14% higher than those calculated using the TSK calibration curve, and the differences between two molecular weight averages calculated using the Shodex and TSK calibration curves were significant at the 1% significance level. This means that when the'values of the molecular weight averages are reported, the reporter has to declare which PS calibration standards were employed.
社団法人日本分析化学会の論文
1997-10-05