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中文摘要：
草酸、柠檬酸可分别与三辛胺（TOA）生成稳定的缔合物，化学分析和红外光谱表明缔合比为1：1。以此缔合物为活性物质制作的PVC膜电极，测定溶液中的草酸盐、柠檬酸盐的线性范围分别为1．0×10^-4～1．0×10^-1mol·L^-1和1．0×10^-5-1．0×10^-2mol·L^-1。该电极用于简单模拟体系中草酸和柠檬酸浓度的测定，效果良好。
英文摘要：
Both oxalic acid and citric acid can form stable complexes with TOA. The complex ratios were confirmed to be 1：1 by chemical analyses and FTIR spectra. The PVC membrane electrodes based on these electroactive materials were prepared. The prepared electrodes can be used to determine the concentrations of oxalic acid and citric acid. The linear ranges were from 1.0×10^-4mol· L^-1 to 1.0×10^-1 mol·L^-1 for oxalate acid and from 1.0×10^-5 mol·L^-1 to 1.0×10^-2 mol·L^-1 for citrate. The electrodes were successfully applied to determine the concentrations of oxalic acid and citric acid in simple simulative systems.
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