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DETERMINATION OF SELECTED POLYCYCLIC AROMATIC HYDROCARBONS IN TOASTED BREAD BY SUPERCRITICAL FLUID EXTRACTION AND HPLC WITH FLUORIMETRIC DETECTION

 

作者: M.N. Kayali-Sayadi,   S. Rubio-Barroso,   R. García-Iranzo,   L.M. Polo-Díez,  

 

期刊: Journal of Liquid Chromatography & Related Technologies  (Taylor Available online 2000)
卷期: Volume 23, issue 12  

页码: 1913-1925

 

ISSN:1082-6076

 

年代: 2000

 

DOI:10.1081/JLC-100100462

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

A new method for PAHs determination in toasted bread samples is proposed. The method is based on supercritical-fluid extraction, using CO2and acetonitrile as modifier. The extracted PAHs were collected in 1 mL acetonitrile. Quantitation was carried out by HPLC with fluorimetric detection. A Hypersil Green PAH column, acetonitrile-water gradient mobile phase, and a program of 11 excitation and emission wavelength pairs for fluorimetric detection were used. Recoveries at concentration levels in the range 0.15–3.56 μg/kg bread were close to 100% for all PAHs except fluoranthene, chrysene, and benzo[ghi]perylene. Some PAHs were detected in these samples within the range 0.323–9.40 μg/kg toasted bread; the relative standard deviations were in the range 2 – 12% (n=4).

 

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