Brito G, Andrade J M, Havel J, Díaz C, García F J, Peña-Méndez E M
Department of Health, Canary Islands Public Health Service, Canary Government, 38004-S/C de Tenerife, Tenerife, Spain; Department of Analytical Chemistry, Nutrition and Food Science, University of La Laguna, 38071-La Laguna, Tenerife, Spain.
Meat Sci. 2006 Oct;74(2):296-302. doi: 10.1016/j.meatsci.2006.03.024. Epub 2006 Apr 18.
A total of 115 pork liver pastes were randomly collected in local markets from different brands, countries and containers. The concentrations of nine heavy metals (Cu, Ni, Cd, Fe, Mn, Pb, Cr, Co and Zn), determined by atomic absorption spectrometry, and some qualitative variables described on the labelling constituted the data set. Chemometrics analysis was performed combining principal components analysis (PCA), factor analysis (FA) and typical classification techniques, such as linear discriminant analysis (LDA) and potential curves (PoCu) to classify pork liver pastes. Origin of the sample, manufacturer and effect of manufacturing process were taken into account to verify traceability, which is an important issue in food safety policies.
共从当地市场随机收集了115份不同品牌、产地和包装的猪肝酱。通过原子吸收光谱法测定的九种重金属（铜、镍、镉、铁、锰、铅、铬、钴和锌）的浓度，以及标签上描述的一些定性变量构成了数据集。结合主成分分析（PCA）、因子分析（FA）以及典型分类技术（如线性判别分析（LDA）和势曲线（PoCu））进行化学计量学分析，以对猪肝酱进行分类。考虑样品来源、制造商和生产工艺的影响以验证可追溯性，这是食品安全政策中的一个重要问题。
