کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1244537 | 969689 | 2008 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Simultaneous determination of bromide and nitrate in contaminated waters by ion chromatography using amperometry and absorbance detectors Simultaneous determination of bromide and nitrate in contaminated waters by ion chromatography using amperometry and absorbance detectors](/preview/png/1244537.png)
This study describes a new ion chromatography method using a low-capacity anion exchange column with amperometric and absorbance detection for rapid and simultaneous determination of Br− and NO3− in contaminated waters where one of these ions is present in excess compared to other. The use of two detectors overcomes the problem of baseline separation for Br− and NO3− for accurate quantification, which was commonly encountered when using a low-capacity anion exchange column and suppressed conductivity detection mode. The method achieved accurate quantification of these two ions without requirement of baseline separation. The accuracy of 2.8% for NO3− was determined using a quality control sample obtained from UN GEMS/Water PE Study No. 6. The detection limits for Br− and NO3− were 20 and 6 μg l−1 (25 μl sample), respectively. Linearity of these two ions was over three orders of magnitude with a correlation coefficient >0.998. The influence of potential interfering ions was also studied followed by the determination of Br− and NO3− in seawater, unsaturated zone water, soil extract and groundwater.
Journal: Talanta - Volume 74, Issue 5, 15 February 2008, Pages 1428–1434