کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1244389 | 969685 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Non-chromatographic screening method for the determination of mercury species. Application to the monitoring of mercury levels in Antarctic samples
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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![عکس صفحه اول مقاله: Non-chromatographic screening method for the determination of mercury species. Application to the monitoring of mercury levels in Antarctic samples Non-chromatographic screening method for the determination of mercury species. Application to the monitoring of mercury levels in Antarctic samples](/preview/png/1244389.png)
چکیده انگلیسی
A simple non-chromatographic method for the determination of mercury (Hg2+), methylmercury (MeHg+), dimethylmercury (Me2Hg), and phenylmercury (PhHg+) employing atomic fluorescence spectrometry (AFS) as detection technique was developed. Mercury species showed a particular behavior in the presence of several reagents. In a first stage SnCl2 was employed for Hg2+ determination; in a second step, [Hg2+ + PhHg+] concentration was determined using SnCl2 and UV radiation. MeHg+ decomposition was prevented adding 2-mercaptoethanol. In a third stage, [Hg2+ + PhHg+ + MeHg+] concentration was determined using K2S2O8. Finally, the four species were determined employing NaBH4. Reagents concentration and flow rates were optimized. The extraction technique of mercury species involved the use of 2-mercaptoethanol as ion-pair reagent. The limits of detection for Hg2+, PhHg+, MeHg+, and Me2Hg were 1, 40, 68, and 99 ng Lâ1 with a relative standard deviation of 1.5, 3.1, 4.7 and 5.8%, respectively. Calibration curve was linear with a correlation factor equal to 0.9995. The method was successfully applied to the determination of the mercury species in two Antarctic materials: IRMM 813 (Adamussium colbecki) and MURST-ISS-A2 (Antarctic Krill).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 82, Issue 4, 15 September 2010, Pages 1505-1510
Journal: Talanta - Volume 82, Issue 4, 15 September 2010, Pages 1505-1510
نویسندگان
Pablo H. Pacheco, Adrián Spisso, Soledad Cerutti, Patricia Smichowski, Luis D. Martinez,