Identification of Cationic Herbicides in Deionized Water, Municipal Tap Water, and River Water by Capillary Isotachophoresis/On-Line Raman Spectroscopy
Identification of Cationic Herbicides in Deionized Water, Municipal Tap Water, and River Water by Capillary Isotachophoresis/On-Line Raman Spectroscopy
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通过毛细管等速电泳/在线拉曼光谱鉴定去离子水、市政自来水和河水中的阳离子除草剂
DOI：
10.1366/0003702971942105
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发表时间：
1997
影响因子：
3.5
通讯作者：
M. Morris
中科院分区：
文献类型：
--
作者：
P. A. Walker;J. Shaver;M. Morris
等速电泳 (ITP) 与拉曼光谱检测相结合，用于分离和鉴定加标去离子水、市政饮用水和河水样品中的两种阳离子除草剂：百草枯和敌草快。通过场放大注射到 0.03–0.1 M H2SO4 或 Na2SO4 主导电解质溶液中实现在线预富集，并通过使用 0.03–0.1 M 三（羟甲基）氨基甲烷 (Tris) 尾随电解质溶液实现等速电泳。除草剂在检测窗口处浓缩至 10−3 M 以上，从而可以使用 1 s 积分窗口测量拉曼光谱。除草剂的光谱是从初始浓度为 3.5 × 10−7 M (90 ppb) 百草枯/5.8 × 10−8 M (20 ppb) 敌草快的去离子水中溶液、初始浓度为 1.3 × 10−6 M (335 ppb) 百草枯/1.0 × 10−6 M (360 ppb) 敌草快的饮用水以及初始浓度为5.0 × 10−6 M (1.3 ppm) 百草枯和 3.0 × 10−6 M (1.0 ppm) 敌草快。证明了相关性可用于识别分析物的存在，以及因子分析可用于从低除草剂初始浓度的溶液中恢复光谱。
Isotachophoresis (ITP), coupled with Raman spectroscopic detection, is used to separate and identify two cationic herbicides, paraquat and diquat, in spiked deionized water, municipal drinking water, and river water samples. On-line preconcentration is achieved with the use of field-amplified injection into a 0.03–0.1 M H2SO4 or Na2SO4 leading electrolyte solution, and isotachophoresis is achieved with the use of a 0.03–0.1 M tris(hydroxymethyl)—aminomethane (Tris) trailing electrolyte solution. The herbicides are concentrated to above 10−3 M at the detection window, allowing measurement of Raman spectra with 1-s integration windows. Spectra of the herbicides are obtained from solutions at initial concentrations in deionized water at 3.5 × 10−7 M (90 ppb) paraquat/5.8 × 10−8 M (20 ppb) diquat, from drinking water initially at 1.3 × 10−6 M (335 ppb) paraquat/1.0 × 10−6 M (360 ppb) diquat, and river water initially at 5.0 × 10−6 M (1.3 ppm) paraquat and 3.0 × 10−6 M (1.0 ppm) diquat. The utility of correlation to identify the presence of analytes and of factor analysis to recover spectra from solutions at low initial concentrations of the herbicides is demonstrated.
通过毛细管等速电泳预浓缩核糖核苷酸的在线拉曼光谱。
影响因子：
7.4
作者：
Walker3rd,PA;Kowalchyk,WK;Morris,MD
通讯作者：
Morris,MD