Quantification of anions and cations in environmental water samples. Measurements with capillary electrophoresis and indirect-UV detection.
Quantification of anions and cations in environmental water samples. Measurements with capillary electrophoresis and indirect-UV detection.
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环境水样中阴离子和阳离子的定量。
DOI：
10.1016/s0021-9673(99)00508-7
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
A. Hautojärvi
中科院分区：
文献类型：
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作者：
T. Hiissa;H. Sirén;T. Kotiaho;M. Snellman;A. Hautojärvi
本研究的目的是验证两种分离方法，用于测定天然沃茨中无机阴离子和阳离子的毛细管电泳（CE）间接紫外检测。该研究涉及芬兰核工业乏燃料现场调查中获得的地下水样品筛选方法的开发。在CE分析中，阴离子在均苯四甲酸（pH 7.7）中按溴离子、氯离子、硫酸根、亚硝酸根、硝酸根、氟离子和磷酸二氢根的顺序分离。阳离子在阴离子之后使用18-冠-6-醚溶液在pH 3.6下分离。在这些分析中，铵首先迁移，其次是钾、钙、钠和镁。通过使用浓度水平为0.5-250 mg/l的参比溶液制作的两条或三条校准曲线计算天然水样中的离子浓度。阴离子和阳离子方法的重复性进行了测试，使用实验室制作的参考样品混合物与高和低盐浓度。在分析中的定量限为0.02和0.1毫克/升之间，这取决于离子。在天然沃茨中测试的离子浓度从每升几毫克到几十克不等。
The aim of this study was to validate two separation methods for determination of inorganic anions and cations from natural waters with capillary electrophoresis (CE) by using indirect-UV detection. The research is related to method development for screening of groundwater samples obtained in site investigations for spent fuel of the Finnish nuclear industry. In CE analysis, anions were separated in pyromellitic acid (pH 7.7) in the order bromide, chloride, sulphate, nitrite, nitrate, fluoride and dihydrogenphosphate. Cations were separated at pH 3.6 after anions using an 18-crown-6-ether solution. In these analyses, ammonium migrated first followed by potassium, calcium, sodium and magnesium. The concentrations of the ions in the natural water samples were calculated by using two or three calibration curves made using reference solutions at concentration levels of 0.5–250 mg/l. The repeatabilities of the anion and cation methods were tested using laboratory-made reference sample mixtures with high and low salt concentrations. The limits of quantification in the analyses were between 0.02 and 0.1 mg/l, depending on the ion. Concentrations of ions tested in natural waters varied from a few milligrams to tens of grams per litre.