کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1244537 | 969689 | 2008 | 7 صفحه PDF | دانلود رایگان |

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