According to the distribution Weinan, the atmospheric precipitation characteristics of atmospheric precipitation in monitoring station of Weinan and atmospheric precipitation monitoring station of Nanjiao Village in Linwei District were set up. After one year of monitoring and analysis of the atmospheric precipitation in Weinan, the precipitation amount, pH value, and the change characteristics of conductivity of the atmospheric precipitation were obtained. The concentrations of five kinds of cation （Ca^2＋,NH^4＋,Mg^2＋,Na^＋,K^＋） and four kinds of anion （F^-,Cl^-,SO4^2-,NO3） in the precipita- tion of Weinan and Nanjiao Village were determined by ion chromatography. The results showed that the concentration of SO3 and NO3 in atmospheric precipitation of Weinan changed significantly, while there was no significant change observed on the concentration of F^-, Cl^-, Mg^2＋, K^＋ and Na^＋ in a year.
在碱性介质中,绿原酸对luminol-KIO4化学发光反应有强烈抑制作用,且其抑制的程度与绿原酸的浓度的对数呈线性相关.据此,建立了快速、简便、灵敏度高的流动注射—化学发光测定绿原酸的新方法.方法的线性范围为2.0-200.0 ng mL-1,检出限为0.67 ng mL-1(3σ),RSD小于5%(n=5).采用标准加入法,成功的测定了人体血清和金银花茶叶中绿原酸的含量,加标回收率为94.0-105.0%.在流速为2.0 mL.min-1时,完成一次绿原酸的测定只需1分钟.
