在冠醚萃取锂的研究中,需要对有机相中锂含量准确测定。以前,有机相中锂的测定需要将有机相中的锂反萃到水相中进行测量。这一方法繁琐,费时。本工作利用有机相样品溶于测量介质的特点,同时减小取样体积,建立了1种分光光度法直接测定有机相中锂含量的方法。实验选择有机相样品 In the study of crown ether extraction of lithium, the lithium content in the organic phase needs to be accurately determined. Previously, the measurement of lithium in the organic phase required stripping of the lithium in the organic phase into the aqueous phase for measurement. This method is tedious and time-consuming. In this work, the method of dissolving the organic phase sample in the measuring medium and reducing the sampling volume were established. A spectrophotometric method for the direct determination of lithium in the organic phase was established. Experimental selection of organic samples