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研制成功了两种类型的阴离子涂丝电极;设计了以涂丝电极为指示电极,甘汞电极为参比电极的流通池;选择了适合PVC膜阴离子电极的低容量色谱柱及SO_4~(2-)—H_2PO_4~-缓冲体系作为淋洗剂;解决了鉴定器、色谱柱、淋洗剂三者相匹配这一难题,得到了Cl~-、Br~-、NO_2~-、NO_3~-、四组份分辨良好的色谱峰。利用选定的上述色谱系统对该鉴定器的主要性能进行了鉴定。在此基础上建立了以涂丝电极为鉴定器的液相色谱法,对各种环境样品中的Cl~-、Br~-、NO_2~-、NO_3~-进行同时测定。方法简单快速,灵敏度高,精密度好,适用于各种环境水样中上述组分的同时测定。
Two kinds of anion coated wire electrode were successfully developed. The flow cell with coating electrode as indicator electrode and calomel electrode as reference electrode was designed. The low-capacity column suitable for PVC membrane anion electrode and SO_4 ~ (2) -) - H_2PO_4 ~ - buffer system as eluent, and solved the problem of matching between detector, column and eluent, and got Cl ~ -, Br ~, NO_2 ~ -, NO_3 ~ Four component well-resolved peaks. The main performance of the appraiser was identified using the selected chromatographic system described above. On this basis, the determination of Cl ~ -, Br ~ -, NO_2 ~ - and NO_3 ~ in various environmental samples by liquid chromatography with a wire electrode was established. The method is simple, rapid, sensitive and precise, and suitable for simultaneous determination of the above components in various environmental water samples.