测定油饼主要品质特性能力测试计划试验轮

IF 0.7 Q4 CHEMISTRY, ANALYTICAL
О.М. Chechet, О.S. Haidei, M. Ischenko, А.V. Masluk, S. Shulyak
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引用次数: 0

摘要

提出了油饼主要质量特性检测实验室能力测试新方案。在中试阶段,测定了菜籽油饼的水分含量(I)、脂肪质量分数(II)和粗蛋白质质量分数(III)等品质特征,并以菜籽油饼为样品制备对照样品。结果表明,对照样品具有足够的稳定性和均匀性。这一轮共有22个实验室参与,它们采用了不同的测试方法。结果按ISO 13528中描述的方法处理。在这些计算的基础上,为特征I和特征III选择了鲁棒均值,为特征II选择了结果模态。特征1的熟练度检验标准差取稳健标准差,特征2和特征3的熟练度检验标准差取Horwitz-Thompson方程预测值。可以确定,对于特征I和III,不同的测试方法给出的结果是等效的,因此一些实验室不满意的结果可归因于实验室偏差。对于特征II,根据观测到的测量方法对结果进行聚类。与其他测试方法相比,过时的标准GOST 13496.15-97给出了更高的脂肪质量分数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Pilot Round of Proficiency Testing Scheme for Determination of Main Quality Characteristics of Oil Cake
The new scheme of proficiency testing of laboratories for determination of main quality characteristics of oil cake was developed. In pilot round was determined such quality characteristics as moisture content (I), mass fraction of fat (II) and mass fraction of crude protein (III). The control sample was prepared from the sample of rapeseed oil cake. It was determined that control sample was sufficiently stable and homogeneous. In the round participated 22 laboratories, which used different test methods. The results were processed by the method described in ISO 13528. Based on these calculations as assigned value for characteristics I and III was chosen robust mean value and for characteristic II - mode of results. As standard deviation of proficiency testing for characteristic I was chosen robust standard deviation and for characteristics II and III was chosen value which is predicted by equation of Horwitz-Thompson. It was determined, that for characteristics I and III different test methods gives equivalent results, so some unsatisfactory results of laboratories can be attributed to laboratory bias. For characteristic II clustering of results according to measurement method in observed. It was established, that outdated standard GOST 13496.15-97 gives higher mass fraction of fat compared to other test methods.
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来源期刊
CiteScore
1.00
自引率
14.30%
发文量
12
期刊介绍: The journal "Methods and objects of chemical analysis" is peer-review journal and publishes original articles of theoretical and experimental analysis on topical issues and bio-analytical chemistry, chemical and pharmaceutical analysis, as well as chemical metrology. Submitted works shall cover the results of completed studies and shall make scientific contributions to the relevant area of expertise. The journal publishes review articles, research articles and articles related to latest developments of analytical instrumentations.
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