کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
579560 | 1453145 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sensitive determination of mercury by a miniaturized spectrophotometer after in situ single-drop microextraction
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Sensitive determination of mercury by a miniaturized spectrophotometer after in situ single-drop microextraction Sensitive determination of mercury by a miniaturized spectrophotometer after in situ single-drop microextraction](/preview/png/579560.png)
چکیده انگلیسی
An in situ single-drop microextraction (SDME) method was developed for trace mercury determination by a miniaturized spectrophotometer, in which a simple and cheap light-emitting diode (LED) was employed as the light source, and a handheld charge coupled device (CCD) was served as the detector. A droplet of 0.006% dithizone-CCl4 (m/v) was used as extraction phase and hanged on a rolled PTFE tube. LED light was adjusted carefully to pass through the centre of the droplet and the entrance slit of the CCD detector. The radiation intensities of 475 nm before and after SDME (I0 and Ii) were recorded for quantification. Under the optimum conditions, the system provided a linear range of 2-50 μg Lâ1, with a correlation coefficient of 0.9983 and a limit of detection (3Ï) of 0.2 μg Lâ1. The enrichment factor was about 69. The present method showed the merits of high sensitivity, simplicity, rapidity, low reagent consumption and field analysis potential. Finally, this method was successfully applied for the determination of the total mercury in spiked tap water sample, spiked river water sample and certified reference material (GBW (E) 080393, simulated water).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 183, Issues 1â3, 15 November 2010, Pages 549-553
Journal: Journal of Hazardous Materials - Volume 183, Issues 1â3, 15 November 2010, Pages 549-553
نویسندگان
Fangwen Yang, Rui Liu, Zhiqiang Tan, Xiaodong Wen, Chengbin Zheng, Yi Lv,