摘要
合成了标题化合物，研究了该化合物作为光度法测定铜的显色剂的可能性。结果表明，在pH9．0的硼砂缓冲溶液中，有乳化剂OP存在时目标化合物与Cu^2＋形成一种紫红色配合物，其最大吸收波长为596nm，摩尔吸光系数ε为5．75×10^4L·mol^-1·cm^-1，Cu^2＋的浓度在0．05—0．48μg／mL范围内服从比尔定理，方法可满意地用于食品样品中铜的测定。
A new reagent 1 - （ 8＇- （ 5＇- sulfoquinoline） ）-32 （ p - nitre- phenyl） triazene （SQNPT） was synthesized and characterized. The possibility of this reagent for the application as a chremogenic reagent for determination of Cu^2＋ was studied. It was found that an amaranth complex with a maximum absorption wavelength at 596 nm and a molar absorptivity of 5.75 × 10^4 L· mol^-1·cm^-1 was formed between SQNPT and Cu^2＋ in Na2B4O7 buffer solution （pH 9.0） in the presence of the emulsifier OP. The Beer＇s law was obeyed at a Cu^2＋ concentration range of 0.05 - 0.48 μg/mL. The method has been satisfactorily used for the determination of copper in food samples.
出处
《化学试剂》
CAS
CSCD
北大核心
2007年第3期154-156,共3页
Chemical Reagents
基金
云南省人才培引项目(2004PY01-4)资助
