کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
743263 | 894348 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Rapid sensing of molybdenum by combined colorimetric solid-phase extraction-Reflectance spectroscopy
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Rapid sensing of molybdenum by combined colorimetric solid-phase extraction-Reflectance spectroscopy Rapid sensing of molybdenum by combined colorimetric solid-phase extraction-Reflectance spectroscopy](/preview/png/743263.png)
چکیده انگلیسی
A new and selective colorimetric solid-phase extraction (C-SPE) procedure for the determination of Mo(VI) in aqueous samples is proposed. Phenylhydrazine (PHZ) was used as a coloring reagent for molybdenum and its immobilisation onto a commercially available Amberlite XAD-16 resin was achieved. In this analytical technique analogous to a reflectometric sensor, the analytes in samples were extracted onto a solid sorbent matrix loaded with a colorimetric reagent and then quantified directly on the adsorbent surface by using a miniature reflectance spectrometer. The measurements were carried out at a wavelength of 554.05 nm since it yielded the largest divergence different in reflectance spectra before and after reaction with Mo(VI). The solution pH was controlled at pH 2.2 using phosphoric acid-primary phosphate buffer solution. A large number of metal ions known as common matrix elements for Mo(VI) did not interfere with the determination. The amount of resin-concentrated Mo(VI) was then determined in a few seconds by using a miniature reflectance spectrometer, with a total sample workup and readout time of â¼5 min using only 1-mL sample volumes. The linear dynamic range of Mo(VI) was found within the concentration range of 0.5-12 ppm with its LOD of 0.2 ppm. The C-SPE from different extractions (n = 5) gave a RSD of 3.3% at 9.6 ppm Mo.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 141, Issue 2, 7 September 2009, Pages 491-497
Journal: Sensors and Actuators B: Chemical - Volume 141, Issue 2, 7 September 2009, Pages 491-497
نویسندگان
Hayati Filik, Duygu Aksu, ReÅat Apak, Ä°smail Boz,