Detection and characterisation of frauds in bovine meat in natura by non-meat ingredient additions using data fusion of chemical parameters and ATR-FTIR spectroscopy

卷:205

Nunes, Karen M. ; Andrade, Marcus Vinicius O. ; Santos Filho, Antonio M. P. ; Lasmar, Marcelo C. ; Sena, Marcelo M.

Univ Fed Minas Gerais

关键词: Data fusion;    Meat adulteration;    Forensic analysis;    Mid-infrared spectroscopy;    PLS-DA;   

DOI  :  10.1016/j.foodchem.2016.02.158

学科分类：食品科学和技术

【 摘 要 】

Concerns about meat authenticity are increasing recently, due to great fraud scandals. This paper analysed real samples (43 adulterated and 12 controls) originated from criminal networks dismantled by the Brazilian Police. This fraud consisted of injecting solutions of non-meat ingredients (NaCl, phosphates, carrageenan, maltodextrin) in bovine meat, aiming to increase its water holding capacity. Five physicochemical variables were determined, protein, ash, chloride, sodium, phosphate. Additionally, infrared spectra were recorded. Supervised classification PLS-DA models were built with each data set individually, but the best model was obtained with data fusion, correctly detecting 91% of the adulterated samples. From this model, a variable selection based on the highest VIPscores was performed and a new data fusion model was built with only one chemical variable, providing slightly lower predictions, but a good cost/performance ratio. Finally, some of the selected infrared bands were specifically associated to the presence of adulterants NaCl, tripolyphosphate and carrageenan. (C) 2016 Elsevier Ltd. All rights reserved.