Geographical verification of Slovenian milk using stable isotope ratio, multi-element and multivariate modelling approaches

被引:19
作者
Potocnik, Doris [1 ,2 ]
Necemer, Marijan [3 ]
Perisic, Igor [1 ,2 ]
Jagodic, Marta [1 ,2 ]
Mazej, Darja [1 ]
Camin, Federica [4 ]
Eftimov, Tome [5 ]
Strojnik, Lidija [1 ,2 ]
Ogrinc, Nives [1 ,2 ]
机构
[1] Jozef Stefan Inst, Dept Environm Sci, Jamova Cesta 39, Ljubljana 1000, Slovenia
[2] Jozef Stefan Int Postgrad Sch, Jamova Cesta 39, Ljubljana 1000, Slovenia
[3] Jozef Stefan Inst, Dept Low & Intermediate Energy Phys, Jamova Cesta 39, Ljubljana 1000, Slovenia
[4] Fdn Edmund Mach FEM, Res & Innovat Ctr, Dept Food Qual & Nutr, Via E Mach 1, I-38010 San Michele All Adige, Italy
[5] Jozef Stefan Inst, Comp Syst Dept, Jamova Cesta 39, Ljubljana 1000, Slovenia
基金
欧盟地平线“2020”;
关键词
Cow milk; IRMS; Elemental composition; Stable isotope ratios; Multivariate analysis; DISCRIMINANT-ANALYSIS; TRACE-ELEMENTS; ORGANIC MILK; ORIGIN; OXYGEN; AUTHENTICITY; HYDROGEN; COMBINATION; DELTA-C-13; PROFILES;
D O I
10.1016/j.foodchem.2020.126958
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
This work examines the use of stable isotopes and elemental composition for determining geographical origin and authenticity of cow milk from four geographical regions of Slovenian. Samples (277) were collected during summer and winter (2012-2014). It was possible to discriminate milk samples according to the year, season and production region using discriminant analysis (DA). The overall temporal prediction variability was 84.6% and 56.4% for regional differences. It was also possible to discriminate milk from three geographic regions, although Alpine samples overlap with Dinaric and Pannonian ones. Prediction ability was the highest for the Pannonian (82.1%) and lowest (26.9%) for the Alpine region. Pairwise comparison using OPLS-DA also displaying good regional predictability (>= 0.77) with delta C-13(cas) values and Br content carrying the most variance. A model based on DD-SIMCA was also developed and applied to the control of Slovenian milk. The results revealed the mislabeling of three Slovenian milk products.
引用
收藏
页数:11
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