機器校正用標準液の調製とその利用に関する研究

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In this thesis, based on the concept of uncertainty, recently introduced as a replacement for the error, methods for solving several problems in preparing and utilizing standard solutions were studied. The study began by reviewing the methods used to evaluate the uncertainties of the concentration value of standard solutions, while taking into consideration the current state of agreement in the international societies for standard materials and the uncertainties. Secondly, an evaluation of the storage stability, an important factor in the uncertainty of standard solutions, was considered based on newly designed experiments. Accordingly, the effects of the factors and the levels on the storage stability of cyanide ions were evaluated quantitatively by applying signal-to-noise ratios and orthogonal-array experiments. The storage stability under the optimum conditions were revealed. Separately, the article explains that the concentration of the standard solution was reduced due to a degradation of cyanide ions into ammonia and formic acid. Thirdly, for the purpose of evaluating the uncertainty of the quantitative values, the theoretical backgrounds and reasonable calculating method of the quantifications for both cases of the homogeneous precision and the non-homogeneous precision of the values on the ordinate axis are discussed, including an evaluation of the uncertainty of the calibration line parameters. Fourthly, the linearity of the regression line for the calibration in anion determination by ion chromatography with a suppressed conductivity detector was studied both theoretically and experimentally. Depending on the required precision or concentration range, the results indicate that linear regression curve fitting is not always suitable for producing accurate analytical curves.
社団法人日本分析化学会の論文
2005-01-05

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四角目和広
財団法人化学物質評価研究機構

機器校正用標準液の調製とその利用に関する研究

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