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当前位置: 首页 > 文章 > 锰(Ⅱ)-OP-5-Br-PADAP极谱络合吸附波研究 食品科学 2011,32 (16) 295-299
Position: Home > Articles > Polarographic Adsorptive Wave Characteristics of Manganese-2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol-Octyl Polyethylene Glycol Phenyl Ether(5-Br-PADAP-OP) Complex FOOD SCIENCE 2011,32 (16) 295-299

锰(Ⅱ)-OP-5-Br-PADAP极谱络合吸附波研究

作  者：
杜芳艳;邓保炜;张亚;刘小艳
单  位：
榆林学院化学与化工学院
关键词：
锰;吸附波;2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚(5-Br-PADAP);聚乙二醇辛基苯基醚(OP)
摘  要：
建立简便、快速的锰的极谱分析法,采用线性扫描极谱法对锰-2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚(5-Br-PADAP)-聚乙二醇辛基苯基醚(OP)体系进行研究。结果表明:在Na2B4O7-NaOH(pH11.0)缓冲溶液中,锰-2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚(5-Br-PADAP)-聚乙二醇辛基苯基醚(OP)络合物在-0.73V(vs.SCE)左右产生一灵敏的吸附波,该波的二阶导数峰峰电流在0.10～0.32μg/mL范围内与锰质量浓度呈线性关系(r=0.9989,n=10)。检出限为0.05μg/mL。经多种电化学方法证明该波为络合物吸附波,其电极过程为不可逆过程,电子转移数为2,此外还验证了多种离子对峰电流Ip''的影响。所拟方法用于大米中锰含量的测定,回收率在94.1%～101.0%之间,相对标准偏差为1.9%。
译  名：
Polarographic Adsorptive Wave Characteristics of Manganese-2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol-Octyl Polyethylene Glycol Phenyl Ether(5-Br-PADAP-OP) Complex
作  者：
DU Fang-yan,DENG Bao-wei,ZHANG Ya,LIU Xiao-yan(School of Chemistry and Chemical Engineering,Yulin College,Yulin 719000,China)
关键词：
manganese;adsorption wave;2-(5-bromo-2-pyridylazo)-5-diethylaminophenol(5-Br-PADAP);octyl polyethylene glycol phenyl ether(OP)
摘  要：
In order to establish a simple and rapid method for the polarographic analysis of manganese,manganese-2-(5-bromo-2-pyridylazo)-5-diethylaminophenol(5-Br-PADAP)-octyl polyethylene glycol phenyl ether(OP) system was studied by linear sweep polarography.The results showed that in Na2B4O7-NaOH(pH 11.0) buffer solution,manganese-2-(5-bromo-2-pyridylazo)-5-diethylaminophenol(5-Br-PADAP)-octyl polyethylene glycol phenyl ether(OP) complex at-0.73 V(vs.SCE) could produce a sensitive adsorption wave.The second-order derivative peak current of the wave revealed a linear relationship with manganese over the concentration range of 0.10-0.32μg/mL(r = 0.9989,n = 10).The detection limit was 0.05μg/mL.Meanwhile,this adsorption wave was an irreversible electrode process,which could be verified by various electrochemical methods.The electron transfer number was 2 and the effects of ions on peak current were also validated.This proposed method was used for the determination of manganese content in rice with a recovery rate ranging from 94.1% to 101.0% and a relative standard deviation of 1.9%.

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