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型纳米复合膜修饰碳糊电极(CPE),建立了一种测定扑热息痛(PCT)的新方法.采用扫描电镜(SCE)对修饰电极进行了表征;利用循环伏安法(CV)研究了PCT在修饰电极上的电化学行为.利用微分脉冲溶出伏安法(DPSV)优化了测定PCT的试验条件.结果表明:PCT在Nafion/GS/AuNs修饰电极上于0.43V处出现了一灵敏的氧化峰(Epa),其电极过程受扩散控制.同时利用氧化峰可以进行微量PCT的检测,其峰电流(ip)与PCT浓度(c)在0.5~10μmol/L和10~900μmol/L范围内均呈良好的线性关系,相关系数分别为0.9968和0.9973,检出限(S/N=3)为0.1μmol/L.复合膜修饰电极稳定性较好,可用于实际药品中扑热息痛的含量的快速检测.关键词:石墨烯;纳米金;碳糊电极;微分脉冲溶出伏安法;扑热息痛;......
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. The results by scanning electron microscopy (SEM) show that the coating of the sam-ple (0.09 wt pct Si) with iron-electrodeposited pretreatment eliminates the reactive zones which are found in the coating without iron-electrodeposited pretreatment. The galvanized sample (0.28 wt pct Si) with iron-electrodeposited pretreatment exhibits a compact and coherent coating. The coating of the sample (0.37 wt pct......
to 16-18 MPa.m1/2.But 15 wt pct Mo was not more effective on Ti(C,N)-based cermets, because the thickness of the rim becomes larger. In the circumstance of Mo2C, 5 wt pct Mo2C was good for microstructure and properties of Ti(C,N)-based cermets, but 11 wt pct Mo2C has resulted in larger contiguity of Ti(C,N) grain and big Ti(C,N) grain diameter so as to reduce transverse rupture strength......
transformation (TTT) behavior of the low carbon steels with two Si con-tents (0.50 wt pct and 1.35 wt pct) was investigated with and without the prior deformation. The results show that Si and the prior......
×10-6 with the content of metal Cu-Ni increasing from 0 to 20 wt pct. Post-examination shows that metallic phase Cu-Ni is corroded preferentially during electrolysis and many pores are left at the anode surface. Considering the corrosion resistance and electrical conductivity, the cermet containing metal Cu-Ni 5 wt pct should be selected and studied further. Key words:Aluminum electrolysis; Inert......
背景荧光猝灭-免疫层析法检测降钙素原李贝贝,陈俊蕾,马丽,李新霞,关明摘 要:建立背景荧光猝灭-免疫层析法(bFQICA)定量检测降钙素原(PCT)的方法.利用双抗体夹心法原理,将合适质量浓度的捕获抗体,检测抗体分别固定在试纸条和微孔内,层析时与样本形成抗体-抗原-抗体的夹心结构.测定PCT的质量浓度范围为0. 27~20 ng/mL,检出限为0. 27 ng/mL,加标回收率为94. 0%~94. 6%,试剂的批间和批内相对标准偏差均小于15%,与C-反应蛋白(CRP,10. 0μg/mL),人血清淀粉样蛋白A (SAA,10. 0μg/mL)均无交叉反应,样本中常见的干扰物在所测定的质量浓度下对PCT定量检测无明显影响,用该方法与90例临床血清样本测得值进行对比,检测结果相关性良好(r=0......
基于上转换发光纳米材料NaYF4:Yb,Er的免疫层析试纸条测定血清中的降钙素原朱瑾,夏刚强,罗芳,雷丽江,韩毓旺,张红漫南京工业大学化学与分子工程学院摘 要:制备上转换发光纳米材料(UCP)--NaYF4:Yb,Er,进行表面功能化修饰后将其作为荧光标记物,制备了快速测定血清中降钙素原(PCT)的免疫层析试纸条.通过优化得到免疫层析反应的最佳条件:抗体标记量为15mg·g-1,UCP免疫复合物的用量为40μg,检测线抗体划膜量为1.0μL·cm-1,孵育时间为5min.PCT的线性范围为0.0550μg·L-1,检出限(3s/k)为0.020μg·L-1.应用制得的免疫层析试纸条测定血清样品中的PCT,结果与罗氏电化学发光法的结果一致,测定值的相对标准偏差(n=3)小于23%.关键词......
="ChDivSummary">The effect of solid solution supersaturation on the precipitation of γ′ in rapidly quenched Ni-Al binary alloys containing 11.6, 14.2 and 16.5 at. pct Al was investigated. The samples were solutioned at 1250°C, quenched in iced brine, and then analyzed by electron microscopy and XRD (X-ray diffraction) techniques. In Ni-11.6 at. pct Al alloy, ordering and phase separation took place......
