کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4908230 | 1426593 | 2016 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Use of a composite electrode modified with magnetic particles for electroanalysis of azo dye removed from dyed hair strands
ترجمه فارسی عنوان
استفاده از یک الکترود کامپوزیتی که با ذرات مغناطیسی اصلاح شده است برای الکترونی از رنگ های آزو که از رشته های مو رنگ شده حذف شده است
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The analysis of dyes in hair samples can provide useful information for forensic purposes. The present work describes a novel method for the extraction of dye from a hair sample and its determination using a composite electrode to pre-concentrate carboxyl-functionalyzed magnetic nanoparticles (CFMP) employed to collect the dye in solution, hence increasing the sensitivity of the analysis. The Basic Brown 16 dye, which is widely used in temporary hair dying, was chosen as a model compound. After 15 s of reaction between 1.5 Ã 10â 5 mol Lâ 1 of dye and 0.1 mg mLâ 1 of carboxyl-functionalyzed magnetic nanoparticles in phosphate buffer electrolyte at pH 7.0, the derivative dye was collected during 40 s at the graphite-epoxy composite electrode and then transferred to a new solution of phosphate buffer at pH 7.0. The dye presented a peak current at a potential of 0.42 V that was almost 400 times higher than without the preconcentration step, suggesting that the dye was pre-accumulated due to strong magnetic interaction with the composite electrode. Under optimized conditions, the analytical curve constructed using square wave voltammetry was linear for BB16 dye concentrations between 1.00 Ã 10â 7 and 1.00 Ã 10â 6 mol Lâ 1. The limits of detection and quantification were 1.01 Ã 10â 8 and 2.37 Ã 10â 8 mol Lâ 1, respectively. The proposed method was successfully applied in the determination of BB16 dye extracted from a dyed hair strand sample by alkaline digestion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 782, 1 December 2016, Pages 26-31
Journal: Journal of Electroanalytical Chemistry - Volume 782, 1 December 2016, Pages 26-31
نویسندگان
Gláucia Tinoco Corrêa, Auro Atsuchi Tanaka, Maria Isabel Pividori, Maria Valnice Boldrin Zanoni,