کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10561432 | 969774 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of selenium in water and soil by hydride generation atomic absorption spectrometry using solid reagents
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
A hydride generation method for the determination of traces of selenium at ng mLâ1 concentration ranges has been introduced using a solid mixture of tartaric acid and sodium tetrahydroborate. Atomic absorption spectrometry (AAS) has been used as the detection system. Several parameters such as the ratio of tartaric acid to sodium tetrahydroborate, type and amount of acid, and the reaction temperature were optimized by using 640 ng mLâ1 (16 ng per 25 μL) of Se(IV) standard solution. The calibration curve was linear from 20 to 1200 ng mLâ1 (0.5-30 ng Se(IV) per 25 μL). The relative standard deviation (%R.S.D.) of the determination was 1.93% and the detection limit was 10.6 ng mLâ1 (265 pg per 25 μL) of Se(IV). The reliability of the method was checked using different types of environmental samples, such as several types of water, a sample of soil and also in a kind of calcium phosphate sample by standard addition method. For conversion of Se(VI) present in real samples to Se(IV), l-cysteine was added to NaBH4 and tartaric acid mixture. The results showed good agreement between this method and other hydride generation techniques.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 66, Issue 4, 15 May 2005, Pages 858-862
Journal: Talanta - Volume 66, Issue 4, 15 May 2005, Pages 858-862
نویسندگان
Norooz Maleki, Afsaneh Safavi, Mohammad Mahdi Doroodmand,