摘要
合成并鉴定了一个新的二安替比林类试剂：二安替比林基－（３－溴）苯基甲烷（ＤＡｍＢＭ），研究了它与钒（Ⅴ）的显色条件。在Ｍｎ（Ⅱ）和Ｔｗｅｅｎ－２０存在下，ＤＡｍＢＭ与Ｖ（Ⅴ）在浓Ｈ３ＰＯ４介质中产生橙色产物，λｍａｘ＝４９０ｎｍ。ε＝２．４４×１０６Ｌ．ｍｏｌ－１ｃｍ－１。Ｖ（Ⅴ）量在０．１－１．１μｇ／２５ｍｌ范围内符合比尔定律。用该体系测定中草药中的Ｖ（Ⅴ），结果满意。
Diantipyryl -(m-bromo)- Phenylmethane (DAmBA) has been synthesized and identified. Astudy of colour reaction of V(Ⅴ) with DAmBM has been carried out. In the presence of Mn(Ⅱ ) and Tween-20,V(Ⅴ) reacts with DAmBM to form an orange product in a buffer solution of H3PO4. Maximum absorbance is at 490nmwith molar absorptivity of 2.44 ×106 L·mol-1 - cm- 1.Beer's law is obeyed in the range 0. 1 -1.1μg/25ml.Themethod has been satisfactorily applied to the determination of V(Ⅴ) in Chinese herbal medicine.
出处
《云南化工》
CAS
1996年第2期35-36,共2页
Yunnan Chemical Technology
关键词
钒
安替比林基
苯基甲烷
光度法
试剂
显色剂
vanadium
diantipyryl-(m-bromo)-phenylmethane
spectropbotometry
