摘要
合成了新试剂二安替比林邻溴苯基甲烷（ＤＡＯＢＭ），研究了它和Ｍｎ（Ⅶ）的显色反应条件．在磷酸介质中，Ｍｎ（Ⅱ）存在下，ＤＡＯＢＭ和Ｍｎ（Ⅶ）生成橙色产物，λｍａｘ为４８０ｎｍ，ε为９．６６×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，锰含量在０．１－１．２μｇ／２５ｍＬ内符合比尔定律．方法用于食品中痕量锰的测定，结果满意．
Diantipyryl (o bromo) phenylmethane (DAOBM) was synthesized and identified. A highly sensitive spectrophotometric method has been developed for the determination of manganese with DAOBM, In the presence of Mn(Ⅱ) ,Mn(Ⅶ) can reacts with DAOBM to form an orange product in phosphoric acid medium. The molar absorptivity is 9,66×10 5L·mol -1 ·cm -1 at 480nm. Beer’s law is obeyed in the range of 0.1-1.2μg/25mL. The method has been applied to the determination of microamount of manganese in tea and edibles and the results are satisfactory.
出处
《分析科学学报》
CAS
CSCD
1997年第4期319-321,共3页
Journal of Analytical Science
基金
云南省教委自然科学基金
关键词
光度法
锰
DAOBM
显色反应
Manganese, Diantipyryl (o bromo) phenylmethane, Spectrophotometry
