在９～１０ｍｏｌ／ＬＨＣｌ介质中用ＣＣｌ４萃取锗，分离共存元素，再反萃取到水相，在阳离子表面活性剂ＣＴＭＡＢ存在下，锗与显色剂ＰＦ（苯基荧光酮）生成１∶２络合物，分光光度法测定食品和中药中锗含量。Ｇｅ（Ⅳ）－ＰＦ－ＣＴＭＡＢ体系可稳定２ｈ，最大吸收峰在５０６ｎｍ，摩尔吸收系数为１．２７×０５Ｌ·ｍｏｌ－１·ｃｍ－１．锗含量在０～０．３６ｍｇ／Ｌ范围内符合比尔定律，相对标准偏差为４．４％，回收率为９３％～１１０％，适用于食品、中药和某些矿样中锗的测定． The crucible was extracted with CCl4 in 9-10 mol/L HCl medium, and the coexisting elements were separated and then back-extracted into the aqueous phase. In the presence of the cationic surfactant CTMAB, ruthenium and the developer PF (phenylfluorone) generated a 1:2 complex. Compounds, spectrophotometric determination of strontium in foods and traditional Chinese medicines. The Ge(IV)-PF-CTMAB system can be stable for 2 h, with a maximum absorption peak at 506 nm and a molar absorption coefficient of 1.27×05 L·mol-1·cm-1. Beer’s law is obeyed in the range of 0-0.36mg/L, the relative standard deviation is 4.4%, and the recovery rate is 93% to 110%. It is suitable for the determination of radon in food, Chinese medicine and certain mineral samples.