Kukusamude Chunyapuk, Puripunyavanich Vichai, Kongsri Supalak
Nuclear Technology Research and Development Center (NTRDC), Thailand Institute of Nuclear Technology (Public Organization), 9/9 Moo 7, Saimoon, Ongkharak, Nakhon Nayok 26120, Thailand.
Food Chem X. 2023 Feb 26;17:100613. doi: 10.1016/j.fochx.2023.100613. eCollection 2023 Mar 30.
This study aims to discriminate the geographical origin of Thai Hom Mali rice in order to protect consumers from mislabeling. Stable isotopic and elemental compositions (δC, δN, δO, As, Br, K, Mn, Rb, and Zn) of Thai Hom Mali rice cultivated inside and outside the Thung Kula Rong-Hai Plain were combined with chemometric analysis, linear discriminant analysis (LDA) and partial least squares-discriminant analysis (PLS-DA). The 9 variables combined with LDA can distinguish Thai Hom Mali rice cultivated inside and outside the Thung Kula Rong-Hai Plain with 98.2 % correct classification and 94.6 % cross-validation. The efficiency in using stable isotopic and elemental compositions combined with soft PLS-DA was achieved 100 % in discrimination of Thai Hom Mali rice cultivated inside and outside the Thung Kula Rong-Hai Plain. The variables δN, Br, K, and Rb were key parameters to discriminate the geographical origin of Thai Hom Mali rice.
本研究旨在鉴别泰国香米的地理来源，以保护消费者免受标签错误之害。将通古拉荣海平原内外种植的泰国香米的稳定同位素和元素组成（δC、δN、δO、As、Br、K、Mn、Rb和Zn）与化学计量分析、线性判别分析（LDA）和偏最小二乘判别分析（PLS-DA）相结合。这9个变量与LDA相结合，可以区分通古拉荣海平原内外种植的泰国香米，正确分类率为98.2%，交叉验证率为94.6%。在区分通古拉荣海平原内外种植的泰国香米方面，将稳定同位素和元素组成与软PLS-DA相结合的效率达到了100%。变量δN、Br、K和Rb是鉴别泰国香米地理来源的关键参数。
