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研究并建立了一种液液连续萃取无分散流动注射（ＦＩ）在线监测系统。其基本思想是：在水相中的被分析物首先采用液液连续萃取的方法被分离并富集到一有机相中，然后用首次提出的无分散ＦＩ技术进行在线监测，使萃取分析的灵敏度得到提高。对Ｚｎ２＋－双硫腙萃取体系的研究表明，在最佳实验条件下，萃取百分率可达到８８．４％；无分散在线监测的结果表明，当用８．８×１０－７ｍｏｌ／ＬＺｎ２＋的标准溶液监测时，相对标准偏差为１．３％，采样频率为６０样·ｈ－１。
A continuous and liquid-liquid-free flow injection (FI) online monitoring system was developed and established. The basic idea is that the analytes in the aqueous phase are first separated and enriched into an organic phase by liquid-liquid continuous extraction and then monitored online with the fi rst time non-dispersive FI technique so that the sensitivity of the extraction assay Be improved. The study of Zn2 + -dithihydrazone extraction system showed that under the optimal experimental conditions, the extraction percentage could reach 88.4%. The results of non-dispersive on-line monitoring showed that when using 8.8 × 10-7mol / L Zn2 + standard solution When monitoring, the relative standard deviation was 1.3% and the sampling frequency was 60 samples · h-1.