二溴苯基荧光酮(DBPF)的合成和分光光度特性的研究已有报导,实验得知,在OP存在下和微酸性介质中,Sn与DBPF作用能生成高灵敏度的红色络合物。目前,应用该试剂作光度法测定微量锡的研究还未有报导。本文探讨了在OP存在下,锡与DBPF生成络合物颜色反应的适宜条件及其外来离子影响和消除,拟定出直接光度测定微量锡的新方法。此法简单、快速而准确。可获得满意的结果。 Studies on the synthesis and spectrophotometric properties of dibromophenylfluorone (DBPF) have been reported. Experiments show that under the presence of OP and slightly acidic medium, Sn and DBPF can produce highly sensitive red complexes. At present, the application of this reagent for the determination of trace tin spectrophotometry has not been reported. In this paper, the suitable conditions for the color reaction between tin and DBPF to form complexes and the influence and elimination of extraneous ions in the presence of OP were discussed, and a new method for direct determination of trace tin by photometry was developed. This method is simple, fast and accurate. Satisfactory results can be obtained.