水扬基荧光酮－溴化十六烷基三甲胺荧光熄灭法测定茶叶中的微量锰  

A Fluorescence Quenching Method forDetermination of Trace Manganese in Tea Leaves with Salicylfluorone-CTMAB

作　　者：敖登高娃[1] 赛音[1] 袁金龙[1] 邹淑仙[1] 

机构地区：[1]内蒙古大学化学系

出　　处：《分析试验室》1995年第3期67-69,共3页Chinese Journal of Analysis Laboratory

摘　　要：本文研究了锰（Ⅱ）－水杨基荧光酮－溴化十六烷基三甲。在０．２１～１．６μｇ／２５ｍＬ范围内具有线性关系。检测限为０．２１μｇ／２５ｍＬ。本法灵敏度高，用于测定多种茶叶中的微量锰，结果满意。n(Ⅱ)was determined in tea leavesby fluorometric quenching method withsalicylfluorone(SAF) and cetyltrimethyl-am-monium bromide(CTMAB)Sreagents. In pH=9.1 buffer solution , Mn(Ⅱ),SAF and CTMAB react to form acomplex, Its composition was establishedby methods of isomolar continuous varia-tion and equilibrium shift as Mn(Ⅱ):SAF=1:2. Its maximum excitation wave-length is 527nm and maximum emissionwavelength is 550nm。 The linear range is0.21～1.6μg/25mL, The detection limit ofMn(Ⅱ)is 0.2μg/25mL,It has been ap-plied to determine Mn(Ⅱ)in tea leaveswith satisfactory results.

关 键 词：荧光熄灭法 水扬基荧光酮 锰 茶叶 

分 类 号：TS272[农业科学—茶叶生产加工] O614.711[轻工技术与工程—农产品加工及贮藏工程]