کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5136410 | 1494003 | 2017 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Liquid electrode plasma-optical emission spectrometry combined with solid-phase preconcentration for on-site analysis of lead
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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: Liquid electrode plasma-optical emission spectrometry combined with solid-phase preconcentration for on-site analysis of lead Liquid electrode plasma-optical emission spectrometry combined with solid-phase preconcentration for on-site analysis of lead](/preview/png/5136410.png)
چکیده انگلیسی
A relatively rapid and precise method is presented for the determination of lead in aqueous matrix. The method consists of analyte quantitation using the liquid electrode plasma-optical emission spectrometry (LEP-OES) coupled with selective separation/preconcentration by solid-phase extraction (SPE). The impact of operating variables on the retention of lead in SPEs such as pH, flow rate of the sample solution; type, volume, flow rate of the eluent; and matrix effects were investigated. Selective SPE-separation/preconcentration minimized the interfering effect due to manganese in solution and limitations in lead-detection in low-concentration samples by LEP-OES. The LEP-OES operating parameters such as the electrical conductivity of sample solution; applied voltage; on-time, off-time, pulse count for applied voltage; number of measurements; and matrix effects have also been optimized to obtain a distinct peak for the lead at λmax = 405.8 nm. The limit of detection (3Ï) and the limit of quantification (10Ï) for lead determination using the technique were found as 1.9 and 6.5 ng mLâ1, respectively. The precision, as relative standard deviation, was lower than 5% at 0.1 μg mLâ1 Pb, and the preconcentration factor was found to be 187. The proposed method was applied to the analysis of lead contents in the natural aqueous matrix (recovery rate: >95%). The method accuracy was verified using certified reference material of wastewaters: SPS-WW1 and ERM-CA713. The results from LEP-OES were in good agreement with inductively coupled plasma optical emission spectrometry measurements of the same samples. The application of the method is rapid (â¤5 min, without preconcentration) with a reliable detection limit at trace levels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography B - Volume 1060, 15 August 2017, Pages 190-199
Journal: Journal of Chromatography B - Volume 1060, 15 August 2017, Pages 190-199
نویسندگان
Suman Barua, Ismail M.M. Rahman, Iftakharul Alam, Maho Miyaguchi, Hikaru Sawai, Teruya Maki, Hiroshi Hasegawa,