Chemometric Approaches In Analysis Of Vegetable Oils As A Way To Improve An Efficiency Of Forensic Examination

IF 0.7 Q4 CHEMISTRY, ANALYTICAL Methods and Objects of Chemical Analysis Pub Date : 2019-01-01 DOI:10.17721/moca.2019.192-199
V. Rudniev, E. Simakova-Yefremian, V. Khosha, V. Ostropilets
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引用次数: 0

Abstract

The approach to forensic examination performance through accelerated classification and identification research of vegetable oils is demonstrated. It includes derivatization of the original objects, analysis of obtained methyl esters mixture using GC-MS technique and applying of chemometric tools for gathering preliminary data. Subsequent processing of obtained chromatograms using principal component analysis for grouping of objects simplifies further detailed examination. An analysis of hidden correlations between variables and influence of the initial data on the first to third major components formation is provided. Using values of content of only 5 most widespread fat acids leads to satisfied visual pattern for prior recognition of oil samples. Applying of various split ratios is recommended at different stages of gas-chromatographic analysis. Split ratio 1 : 50 is recommended for gathering of data treated by chemometric methods and 1 : 2 is useful for determination of minor components presence as specific features.
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化学计量学方法在植物油分析中的应用——提高法医鉴定效率
阐述了通过植物油的加速分类鉴定研究来提高法医鉴定性能的方法。它包括原始对象的衍生化,使用GC-MS技术分析得到的甲酯混合物,以及应用化学计量工具收集初步数据。使用主成分分析对获得的色谱图进行分组的后续处理简化了进一步的详细检查。分析了变量之间的隐相关性以及初始数据对第一到第三个主要成分形成的影响。仅使用5种最普遍的脂肪酸的含量值就可以获得满意的视觉模式,从而对油样进行预先识别。在气相色谱分析的不同阶段,推荐使用不同的分离比。分裂比1:50推荐用于化学计量方法处理的数据收集,1:2用于确定作为特定特征的次要成分的存在。
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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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