NIR reflectance spectroscopy was applied to the identification of plant drugs. It was possible to satisfactorily distinguish ginseng, Silybwn marianum and grape seeds, directly analysing the product in its finished form. It was possible to identify Silybum samples grown in different areas. Ginseng samples containing starch were identified and old and young roots were distinguishable. Semiquantitative assay of ginsenoside content was possible.
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Corti et al. (1990) studied this question.
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