کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9748772 | 1493791 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of alkylphenolic residues in fresh fruits and vegetables by extractive steam distillation and gas chromatography-mass spectrometry
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This study describes a simple and sensitive method for determining the alkylphenolic compounds, 4-tert-octylphenol (4-t-OP), 4-nonylphenol isomers (4-NPs), and their monoethoxylates (4-t-OP1EO and 4-NP1EOs), in fresh fruits and vegetables. The method involves extracting a sample by a modified Nielson-Kryger steam distillation extraction using n-hexane for 1Â h. The alkylphenolic compounds were identified and quantitated by gas chromatography-mass spectrometry (GC-MS) in selected ion monitoring (SIM) mode. Various pH values and amounts of NaCl added to the sample solution were evaluated as extraction conditions. The quantitation limit of this method was less than 0.2Â ng/g in 10Â g (fresh weight) of sample. Recovery of alkylphenolic compounds in spiked samples exceeded 64% while R.S.D. ranged from 1.0 to 9.8%. Alkylphenolic residues were detected in fresh fruits and vegetables at concentrations of 4-NPs and 4-t-OP from n.d. to 16Â ng/g and from n.d. to 4.8Â ng/g (fresh weight), respectively. NP1EO and OP1EO were always below the quantitation limit.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1088, Issues 1â2, 23 September 2005, Pages 200-204
Journal: Journal of Chromatography A - Volume 1088, Issues 1â2, 23 September 2005, Pages 200-204
نویسندگان
Deng-Kai Yang, Wang-Hsien Ding,