摘要
研究发现,在碱性介质中甲基嘧啶磷能够有效增强鲁米诺-H2O2体系的化学发光。据此,结合流动注射分析法,建立了测定甲基嘧啶磷的流动注射化学发光分析方法,并对可能的反应机理进行了探讨。考察了甲基嘧啶磷-鲁米诺-H2O2体系的化学发光反应动力学以及反应体系pH、鲁米诺浓度、H2O2浓度、流速、进样体积等因素对化学发光的影响。结果表明:在最佳条件下,甲基嘧啶磷在5.0×10-8~1.0×10-5g/mL的浓度范围内与发光强度呈良好的线性关系,检出限(S/N=3)为2.5×10-8g/mL。将该体系应用于加标小麦样品测定,回收率为94.7%~113.0%,相对标准偏差为2.2%~3.6%。
It is found that pirimiphos-methyl can greatly enhance the chemiluminescence between luminol and H2O2 in alkaline media.Based upon the finding,coupled with flow-injection analysis technique,a simple and convenient chemiluminescence (FIA-CL) method for the determination of pirimiphos-methyl was developed.And the possible CL mechanism was also discussed.In this work,the CL dynamics of pirimiphos-methyl-luminol-H2O2 was achieved,and the effects of pH values,flow rate,and the concentrations of luminol and H2O2 ...
出处
《分析试验室》
CAS
CSCD
北大核心
2010年第6期34-37,共4页
Chinese Journal of Analysis Laboratory
基金
国家科技支撑计划子课题(2007BAK36B06)项目资助