کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1206417 965233 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of ochratoxin A in milk after direct immunoaffinity column clean-up by high-performance liquid chromatography with fluorescence detection
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Analysis of ochratoxin A in milk after direct immunoaffinity column clean-up by high-performance liquid chromatography with fluorescence detection
چکیده انگلیسی

The present work describes a new analytical method for direct immunoaffinity column clean-up of ochratoxin A (OTA) in milk samples followed by determination of the toxin using high-performance liquid chromatography with fluorescence detection (HPLC-FD). Two different immunoaffinity cartridges (IAC) were investigated, and Ochraprep columns were chosen because they showed the best results. An average recovery of 89.8% and a mean RSD of 5.8% for artificially contaminated cow's milk in the range of 5–100 ng/L were attained. The calculated limit of detection (LOD) and limit of quantitation (LOQ) were as low as 0.5 and 5 ng/L, respectively. This new easy and fast method avoids a previous liquid–liquid extraction step and therefore the use of toxic chlorinated solvents. Chromatograms of the final extracts were clean and OTA could be easily detected at a retention time of 8.4 min without interferences. To assess the presence of the toxin in cow's milk eight samples of skimmed and four samples of whole milk were analysed and OTA was not detected over the established detection limit.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1167, Issue 1, 5 October 2007, Pages 95–101
نویسندگان
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