Characterization of peanuts by DSC for country of origin
1993; Elsevier BV; Volume: 226; Linguagem: Inglês
10.1016/0040-6031(93)80228-3
ISSN1872-762X
Autores Tópico(s)Agricultural pest management studies
ResumoAbstract The Research Divison of the Office of Laboratories and Scientific Services, US Customs Service, recently characterized peanuts for country of origin. This study used differential scanning calorimetry (DSC) to profile oils extracted from peanuts grown in the United States, Argentina and China. The melting behavior of triglycerides and other components in the oil matrix was obtained by controlled heating from the sub-ambient. A series of variables for each oil was assigned to the observed DSC thermal curve for the temperature region between 240 and 340 K. These variables were tabulated and analyzed by multivariate analysis. A graphical presentation of the canonical discriminant functions scores grouped the samples into three areas by country of origin. Distinguishing samples by peanut variety was also explored. DSC results are compared with those obtained by high performance liquid chromatography (HPLC) and trace metal analysis.
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