摘要
在pH6.0的柠檬酸-Na2HPO4缓冲溶液中及PEG-6000存在下,C反应蛋白(CRP)与羊抗人C反应蛋白可聚集形成免疫复合物微粒,在350,390,440 nm处有三个共振散射峰.激光散射法测得免疫复合物微粒的平均粒径为1720.0 nm.在最佳实验条件下,CRP浓度在0.03～1.80μg·mL-1的范围内与390,440 nm处共振散射强度都呈良好的线性关系,其回归方程、相关系数、检出限分别为△I390 nm=306.4c+17.3,△I440 nm=296.0c+10.7;0.9993,0.9996;0.011,0.012μg·mL-1.该方法选择性较好,操作简便,用于人血清中C反应蛋白的测定,结果与免疫透射比浊法结果一致,相对标准偏差在0.90%～4.12%.
In pH 6.0 citric acid-Na2HPO4 buffer solution goat-anti-human C reactive protein （CRP） was combinated with human CRP specifically, to aggregate with formation of immune complex particles that exhibited three resonance scattering peaks at 350, 390 and 440 nm respectively, in the presence of PEG-6000. The laser scattering measurement indicates that the average diameter of the immune complex particles is 1720.0 nm. CRP concentration in the range from 0.03 to 1.80 μg,mL^-1 is all proportional to the resonance scattering intensity at 390 and 440 nm. Its regression equation is A/390nm=306.4c＋ 17.3 and A/440nm=296.0c＋ 10.7, the correlation coefficient is 0.9993 and 0.9996, and the detection limit is 0.011 and 0.012 μg·mL^-1, respectively. The method has been applied to the determination of CRP in the human blood serum, and its results are in agreement with those of the immunoturbity, with relative standard deviation of 0.90%-4.12%.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2007年第13期1239-1242,共4页
Acta Chimica Sinica
基金
国家自然科学基金(Nos.20365001
20667001)
广西新世纪十百千人才工程计划
桂林工学院科研启动基金资助项目
关键词
C反应蛋白
免疫复合物微粒
免疫反应
共振散射
C reactive protein
immune complex particle
immunoreaction
resonance scattering
