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取水利工程水样过滤后,以TSKgel IC-Anion-PWXL PEEK阴离子柱为分离柱,以2.5mmol·L~(-1)四硼酸钠溶液(用乙二胺调节其酸度至pH 10.5)为淋洗液进行离子色谱分离,用非抑制型电导检测器进行测定。Cl~-和SO_4~(2-) 的质量浓度均在2.50~50.00mg·L~(-1)内与其对应的峰面积呈线性关系,Cl~-和SO_4~(2-) 的检出限(3S/N)依次为5.1,7.6μg·L~(-1)。对空白水样连续测定5次,Cl~-和SO_4~(2-) 的峰面积的相对标准偏差依次为4.1%,2.3%。测得加标回收率在97.9%~102%之间。
After the water sample was taken from the water engineering project, TSKgel IC-Anion-PWXL PEEK anion column was used as the separation column, and 2.5 mmol·L -1 sodium tetraborate solution (its acidity was adjusted to pH 10.5 with ethylenediamine) The lotion was separated by ion chromatography and measured with a non-suppressed conductivity detector. The concentrations of Cl ~ - and SO_4 ~ (2-) in the range of 2.50 ~ 50.00 mg · L ~ (-1) were linear with their corresponding peak areas. The detection limits of Cl ~ - and SO_4 ~ (2-) (3S / N) were 5.1 and 7.6 μg · L -1, respectively. The relative standard deviation of the peak areas of Cl ~ - and SO_4 ~ (2-) was 4.1% and 2.3%, respectively. Measured spiked recoveries between 97.9% ~ 102%.