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| 求助：Determination of thiabendazole in orange juice and rind by liquid chromatography with fluorescence detection and confirmation by gas chromatography/mass spectrometry after extraction by matrix solid-phase dispersion |
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wenshuiqi
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2楼2010-01-28 11:04:30
wenshuiqi
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3楼2010-01-28 11:06:29
hawkyin
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小木虫(金币+0.5):给个红包，谢谢回帖交流
lwb1987521(金币+1):感谢兄弟 2010-01-30 15:14
小木虫(金币+0.5):给个红包，谢谢回帖交流
lwb1987521(金币+1):感谢兄弟 2010-01-30 15:14
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Determination of thiabendazole in orange juice and rind by liquid chromatography with fluorescence detection and confirmation by gas chromatography/mass spectrometry after extraction by matrix solid-phase dispersion. A method was developed for the determination of thiabendazole (TBZ) in orange juice and rind, based on matrix solid-phase dispersion. TBZ was extracted with ethyl acetate and the extract was subsequently cleaned up on a solid-phase extraction column. Fungicide residues were determined by LC with fluorescence detection. Recoveries ranged from 87 to 97%, with relative s.d. of 11%. Detection and quantitation limits were 0.15 and 0.50 mug/kg, respectively. Confirmation ofTBZ residues in positive samples was performed by solid-phase microextraction, followed by GC with MS detection using selected ion monitoring. The developed method was then applied to determine TBZ levels in commercial orange juices and in the juice and rind of fresh oranges. Effects of storage and washing of oranges were also investigated on TBZ residues. In fresh oranges, TBZ residues were mainly found in the rind, with only a small fraction appearing in the juice. Most of the commercialjuices presented residue levels below detection limits, and all levels detected were below the MRL set by the EU for TBZ in whole fruits. Storage and washing markedly reduced TBZ levels, especially in the rind. 作 者： Albero, B；Sanchez Brunette, C；Tadeo, J L 刊 名： Journal of AOAC International 年，卷(期)： 2004Vol.87(No.3) 分类号： 关键词： EXTRACTION FOOD SAFETY PLANT FOODS FUNGICIDES GAS CHROMATOGRAPHY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY MASS SPECTROSCOPY ORANGE JUICES ORANGES GC MS LC THIABENDAZOLE 正文语种： eng 基金项目： |
4楼2010-01-29 14:08:33
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小木虫(金币+0.5):给个红包，谢谢回帖交流
小木虫(金币+0.5):给个红包，谢谢回帖交流
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作 者： Albero, B；Sanchez Brunette, C；Tadeo, J L 刊 名： Journal of AOAC International 年，卷(期)： 2004Vol.87(No.3) 分类号： 关键词： EXTRACTION FOOD SAFETY PLANT FOODS FUNGICIDES GAS CHROMATOGRAPHY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY MASS SPECTROSCOPY ORANGE JUICES ORANGES GC MS LC THIABENDAZOLE 正文语种： eng |
5楼2010-04-15 09:59:01