摘要
研究了新试剂２－［（５′－甲基－２′－胂酸基苯）偶氮］－１，８－二羟基－３，６－萘二磺酸与硼的荧光性能。在ｐＨ６．７的磷酸氢二钠－磷酸二氢钾缓冲介质中，硼与试剂形成１∶２的强荧光配合物，其λｅｘ／λｅｍ＝２３５ｎｍ／３６７ｎｍ，Ｂ（Ⅲ）含量在０～２００μｇ／Ｌ范围内呈良好线性关系，检测限为０．６２９μｇ／Ｌ，建立了测定微量硼的新方法。该方法应用于茶叶及淀粉等样品中微量硼的测定，结果满意。
In the paper,the fluorescent properties of 2 [(2′ arsono 5′ methylphenyl) azo] 1,8 dihydoxy 3,6 naphthalenedisulfonic acid(R) and it's complex with boron are studied .A type complex of BR 2 is formed with λ ex / λ em =235nm/367nm.A linear relationship of the calibration curve was obstained in the concentration range of 0～200μg/L for boron ,and the detection limit for B(Ⅲ) is 0.629μg/L.A new method for the determining boron was developed,and it can be applied to determintaion of boron in tea,starch with satifactory results.
出处
《分析试验室》
CAS
CSCD
1998年第6期17-19,共3页
Chinese Journal of Analysis Laboratory
关键词
荧光光度法
硼
茶叶
淀粉
二羟基
萘二磺酸
测定
Fluorometry
boron
tea
starch
2 [(2′ arsono 5′ methylphenyl) azo] 1,8 dihydoxy 3,6 naphthalenedisulfonic acid
