【摘要】 为避免油田水中大量的氯离子对甲酸和乙酸测定的干扰 ,采用减压蒸馏的新方法来处理待测试样 ,不仅消除了氯离子的干扰 ,而且回收率较高 ,在 95 .0 %～ 97.5 %之间 .用低压离子色谱法 (LPIC)分析试样并进行了线性、精密度、回收率和干扰试验 .结果表明方法的回收率在 96.0 %～ 10 0 %之间 ,相关系数分别为0 .9998和 0 .9989,变异系数小于 1.8% ,检测限小于 0 .1μg/mL .更多还原

【Abstract】 A large amount of chlorides significantly interfere with the determination of formic and acetic acids. A new method of decompression distillation is put forward in this paper to prepare the analysed samples. This method not only has good recovery within the range of 95.0%～97.5%, but also can remove the interference of chlorions. Then the samples are analyzed by low_pressure ion chromatography (LPIC). The results show that the recovery is within the range of 96.0%～100%, the correlation coefficients are 0.999 8 and 0.998 9, respectively, and the variation coefficient is not more than 1.8% and the detection limits less than 0.1 μg/mL.更多还原