کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7595427 1492122 2015 27 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A fast and environmental friendly analytical procedure for determination of melamine in milk exploiting fluorescence quenching
ترجمه فارسی عنوان
روش تحلیلی مناسب و سریع برای تعیین ملامین در خنک کردن فلورسنت استفاده از شیر
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
An environmental friendly procedure was developed for fast melamine determination as an adulterant of protein content in milk. Triton X-114 was used for sample clean-up and as a fluorophore, whose fluorescence was quenched by the analyte. A linear response was observed from 1.0 to 6.0 mg L−1 melamine, described by the Stern-Volmer equation I°/I = (0.999 ± 0.002) + (0.0165 ± 0.004) CMEL (r = 0.999). The detection limit was estimated at 0.8 mg L−1 (95% confidence level), which allows detecting as low as 320 μg melamine in 100 g of milk. Coefficients of variation (n = 8) were estimated at 0.4% and 1.4% with and without melamine, respectively. Recoveries to melamine spiked to milk samples from 95% to 101% and similar slopes of calibration graphs obtained with and without milk indicated the absence of matrix effects. Results for different milk samples agreed with those obtained by high performance liquid chromatography at the 95% confidence level.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 169, 15 February 2015, Pages 314-319
نویسندگان
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