title: [Analysis and discrimination of Collocalia esculenta L. via FTIR spectroscopy].
abstract: Collocalia esculenta L. is called Yanwo in China. Thirty kinds of dry yanwo were identified by Fourier transform infrared spectroscopy (FTIR) . The results indicated that there were some obvious differences in FTIR between the dry yanwo and the natural yanwo, mainly represented in some absorption peaks of protein, amino acid (1 634, 1 535 cm(-1)) and amylase (1 034 cm9-1)). Meanwhile, the shape, position and intensity of the peaks from methylene (2 935 cm(-1)), protein and amino acid (1 647, 1 533, 1 447 cm(-1)) in dry yanwo were similar to those of the glutin. Therefore, different amounts of glutin were added in dry yanwo samples. The content of candy in some dry candy yanwo products was as high as 99%, but the content of yanwo was only 1%. The characteristic peaks of yanwo in these products even could not be found. So the quality of yanwo in the market could not be guaranteed from these results. FTIR is fast and direct to analyse and evaluate the quality of yanwo product.
authors.affiliation: Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China.
authors.forename: Yue-E
authors.initials: YE
authors.lastname: Deng
authors.forename: Su-Qin
authors.initials: SQ
authors.lastname: Sun
authors.forename: Qun
authors.initials: Q
authors.lastname: Zhou
authors.forename: Ao
authors.initials: A
authors.lastname: Li
mesh_terms: D000818:Animals; D001717:Birds; D005983:Glutens / Q000032:analysis; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*
chemical_list: D005983:Glutens