کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10542417 963461 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Label-free impedimetric immunosensor for sensitive detection of fenvalerate in tea
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Label-free impedimetric immunosensor for sensitive detection of fenvalerate in tea
چکیده انگلیسی
In this experiment, fenvalerate antibodies were immobilised on the electrode by the crosslinking with glutaraldehyde modified on the glassy carbon electrode (GCE) via chitosan. Fenvalerate was measured by the increase of electron transfer resistance when the immune reaction occurred with Fe(CN)63-/Fe(CN)64- as the probe. Under optimal conditions, the change of resistance is in a linear relationship with the logarithm of the concentration in the range of 1.0 × 10−3 ∼ 1.0 × 101 mg/L (R = 0.998) with a detection limit of 0.80 μg/L. This method bears such merits as simplicity of operation, high sensitivity, wide linear range, specificity, reproducibility and good stability. The immunosensor was applied in the detection of real samples of tea, achieving satisfactory results, and it could be regenerated after being placed alternately in 0.5 mol/L HCl and 0.5 mol/L NaOH solutions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 141, Issue 1, 1 November 2013, Pages 84-90
نویسندگان
, , , , , ,