کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1241994 1495803 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dielectric barrier discharge micro-plasma emission source for the determination of lead in water samples by tungsten coil electro-thermal vaporization
ترجمه فارسی عنوان
منبع تغذیه دی اکسیدکربن برای تعیین منبع سرب در آب با تبخیر الکترولیز تنگستن
کلمات کلیدی
سیم پیچ تنگستن، تبخیر الکتریکی و حرارت، تخلیه مانع دی الکتریک، طیف سنجی انتشار اتمی، رهبری
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• Trace lead analysis is achieved by ETV–DBD-AES.
• The method features with high sensitivity, tiny sampling volume.
• The proposed method requires low power and miniaturizes the entire system.

In this study, a fast and simple approach to directly determinate lead in water samples by a low power dielectric barrier discharge (DBD) excitation source was developed using tungsten coil electro-thermal vaporization (WC ETV) for liquid microsample introduction. A 20 μL sample was dropped onto the WC, and then the sample went through the drying, pyrolysis, subsequently the analyte was vaporized and swept directly into the dielectric barrier discharge micro-plasma for emission, and the whole process took only 3 min. The effects of operating parameters such as plasma gas flow rate, plasma input voltage, pyrolysis current, vaporization current and interferences from concomitant elements were investigated. Under the optimal conditions, the limit of detection (LODs, 3σ) was calculated to be 7.7 μg L−1. Repeatability, expressed as the relative standard deviation of the spectral peak height, was 4.6% (n=11) for 0.1 mg L−1 lead standard solution. The proposed method was successfully applied to the determinations of Pb in water samples.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 132, 15 January 2015, Pages 106–111
نویسندگان
, , , , ,