4,5-二溴洋茉莉基荧光酮的合成及其光度法测定土壤中有效钼的研究

Synthesis of 4,5 Di Bromine PIF and It's Study on the Determination of Valid Mo(Ⅵ) in Soil With Spectrophotometry

报道了４，５－二溴－２，３，７－三羟基－９－洋茉莉基－６－荧光酮（简称ＤＢＰＩＦ）的合成及光度法测定土壤中有效钼．结果表明，在ｐＨ３．０～４．０弱酸性介质中Ｍｏ（Ⅵ）－ＤＢＰＩＦ－ＣＰＣ形成１∶１∶１的三元配合物，配合物最大吸收为５４１．５ｎｍ，表观摩尔吸光系数ε为８．１×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，ＭｏＯ２－４浓度在０～１５μｇ／２５ｍＬ范围内遵守朗伯－比耳定律．方法用于土壤中Ｍｏ的测定，获得较好结果．

The thesis has reported the synthesis of 4,5 Di Bromine 2,3,7 Trihydroxy 9 Piperonal 6 Fluorone(DBPIF) and the application in determining valid Mo(Ⅵ) of soil with spectrophotometry. The experiment indicates that Mo(Ⅵ) DBPIF CPC forms 1∶1∶1 ternary complex. The maximum absorption wavelength λ max is 541.5 nm and the molar absorption coefficient is 8.1×10 4 L·mol -1 ·cm -1 . The method is satisfactory for determining the Mo in soil.