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 : VI.第3回ラウンドロビンテスト結果報告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6報), 前報は森定雄ほか, 分析化学, 46,81,(1997).

概要

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A third round-robin best of three polystyrene samples by size-exclusion chromatography (SEC) was performed at seven laboratories using the same SEC columns under the same experimental conditions of the second round-robin test. After rejecting suspected results of one laboratory, the relative standard deviations (RSD) of the number-average molecular weight (M_n) were between 7.4 and 11%, and those of the weight-average molecular weight (M_w) were between 2.6 and 3.4%. These values can be regarded as the RSD of the molecular-weight averages obtained at different laboratories using the same columns under the same experimental conditions. A recalculation of the chromatographic data obtained at seven laboratories by the same person using the same data processor gave better RSD values of M_n as 2.3〜6.1% including the suspected data. The use of the same data processor operated by the same person was capable of a standardization of the determination of the baseline the baseline and the cutoff molecular weight, which resulted in an improvement in the RSD of M_n. A careful determination and data processing can decrease RSD to these values. Magnification of chromatograms on the data processor makes the determination of the baseline easy, and can give the precision and accuracy of the detector used.
社団法人日本分析化学会の論文
1997-02-05