کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10556806 | 968431 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A novel, environmentally friendly dispersive liquid-liquid microextraction procedure for the determination of copper
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A novel, environmentally friendly dispersive liquid-liquid microextraction procedure for the determination of copper A novel, environmentally friendly dispersive liquid-liquid microextraction procedure for the determination of copper](/preview/png/10556806.png)
چکیده انگلیسی
A novel, simple and environmentally friendly procedure for copper determination has been developed. The method is based on the formation of an ion associate of Cu(I) with 1,3,3-trimethyl-2-[5-(1,3,3-trimethyl-1,3-dihydroindol-2-ylidene)-penta-1,3-dienyl]-3H-indolium (DIDC) in the presence of chloride ions as ligand, followed by dispersive liquid-liquid microextraction (DLLME) of the formed ion associate into organic phase and UV-Vis spectrophotometric detection. The following experimental conditions were used: pH 3, 0.24 mol Lâ 1 chloride ions, 0.06 mmol Lâ 1 DIDC. The effect of the nature of the extraction solvent, auxiliary solvent and disperser solvent used was studied. A mixture of amyl acetate, tetrachloromethane, and methanol in a 1:1:3 v/v/v ratio was selected for the DLLME procedure. The absorbance of the coloured extracts at 640 nm wavelength obeys Beer's law in the range 0.020-0.090 mg Lâ 1 of Cu. The limit of detection calculated from a blank test (n = 10) based on 3s is 0.005 mg Lâ 1 of Cu. The developed procedure was applied to the analysis of water samples. The suggested DLLME is compared with two procedures previously reported from our laboratory based on (1) conventional liquid-liquid extraction, and (2) sequential injection extraction performed in a dual-valve sequential injection system. The advantages and disadvantages of each method are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 99, Issue 1, September 2011, Pages 40-45
Journal: Microchemical Journal - Volume 99, Issue 1, September 2011, Pages 40-45
نویسندگان
Jana Å krlÃková, Vasil Andruch, Ioseph S. Balogh, LÃvia Kocúrová, Lajos Nagy, Yaroslav Bazeľ,