共查询到19条相似文献,搜索用时 140 毫秒
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核黄素化学发光体系测定盐酸赛庚啶 总被引:3,自引:1,他引:2
核黄素是一种荧光试剂,本实验发现,核黄素也可以用作化学发光试剂.以核黄素为化学发光试剂, 构建了NCS-核黄素-盐酸赛庚啶化学发光新体系.利用此体系建立了测定盐酸赛庚啶的化学发光分析新方法.方法的线性范围为0.02~1.0 mg/L, 检出限为9.0 μg/L, 对浓度为01 mg/L盐酸赛庚啶溶液进行11次平行测定的相对标准偏差(RSD)为0.8%.此法已用于药品中盐酸赛庚啶含量的测定, 结果与药典测定结果一致.对化学发光反应的机理也进行了初步的探讨. 相似文献
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基于甲氧氯普胺对钌联吡啶电化学发光信号的增敏作用, 建立了检测甲氧氯普胺的毛细管电泳电致化学发光新方法. 最佳实验条件为: 检测电位1.18 V, 钌联吡啶浓度5 mmol/L, 检测池磷酸缓冲溶液40 mmol/L (pH 7.2), 分离磷酸缓冲溶液20 mmol/L (pH 6.1), 进样电压12 kV, 进样时间10 s, 分离电压14 kV. 方法的检测限(3σ)为5.0×10-3 mg/L, 线性范围为 0.03~9.52 mg/L, 相关系数为0.9990, 回收率为98.0%~101.7%. 对家犬体内甲氧氯普胺血药浓度的监测发现, 给药1.5 h血药浓度达到最大值, 血药浓度的半衰期约为4 h. 本方法具有简便、快速、灵敏、进样量少等特点, 可用于甲氧氯普胺血药浓度监控和药物动力学研究. 相似文献
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在酸性条件下,溴化钠对NaIO4-H2O2-甲氧氯普胺弱化学发光具有增敏作用,结合流动注射技术建立了一种测定甲氧氯普胺的新方法。在优化实验条件下,相对化学发光强度与甲氧氯普胺的质量浓度在1.00×10-9~1.20×10-6g/mL范围内呈良好的线性关系,检出限为3.5×10-10g/mL,相对标准偏差(ρ=1.00×10-7g/mL,n=11)为2.5%。该方法已成功用于片剂及加标尿样中甲氧氯普胺含量的测定,回收率为96%~100%,与标准方法相对照,测定结果基本一致。 相似文献
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在碱性溶液中,吗啡对Ag(Ⅲ)配合物-鲁米诺化学发光体系的化学发光信号有显著抑制作用,且抑制程度与吗啡浓度成正比。基于此,建立了毛细管电泳-间接化学发光检测尿液和血液中吗啡含量的方法。在优化条件下,方法检出限为0.75 mg/L,线性范围为2.0~30.0 mg/L,相关系数(r)为0.999 8;对20mg/L的吗啡进行7次平行测定,测得的相对标准偏差(RSD)为2.0%。结合固相萃取法,该方法成功用于尿液和血液中吗啡含量的测定,平均加标回收率分别为109.0%与101.3%。该方法分辨率高、灵敏、分析成本低,可用于尿液和血液中吗啡含量的测定。 相似文献
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A simple and sensitive chemiluminescence method was developed for the determination of fenfluramine. The chemiluminescence signal arising from the reaction between alkaline luminol and N‐bromosuccinimide was found to be greatly enhanced by fenfluramine in the presence of gold nanoparticles. But fenfluramine alone slightly inhibited the CL signal of N‐bromosuccinimide‐luminol in the absence of gold nanoparticles. The experimental parameters that affected the chemiluminescence signal were thoroughly investigated. Under the optimum experimental conditions, the enhanced chemiluminescence intensity was proportional to the concentration of fenfluramine in the range of 0.005‐1.0 mg/L. The detection limit was 0.9 μg/L fenfluramine with a relative standard deviation of 2.5% for 0.1 mg/L fenfluramine solution (n = 11). The method was applied to the determination of fenfluramine in some weight‐reducing tonics and in spiked human urine. A possible CL reaction mechanism was proposed. 相似文献
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测定核黄素的化学发光新方法 总被引:4,自引:0,他引:4
研究了核黄素的化学发光性质,建立了一种测定核黄素的化学发光新方法,并应用于实际样品中核黄素的测定,与文献相比,本方法无需避光,而且分析体系和样品处理简单;干扰小,牛血清白蛋白、抗坏血酸、天冬氨酸等8种生物有机物质和 Cu(Ⅱ)、Zn(Ⅱ)、Fe(Ⅲ)等15种常见金属离子的允许量较大;核黄素溶液浓度在0. 10~50 mg/L范围内,与化学发光强度成正比,方法线性范围宽;测定1.0mg/L核黄素溶液12次,求得相对标准偏差为2.9%,方法精密度高;方法的检测限为0.075 mg/L,灵敏度高。 相似文献
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Singlet oxygen generated in a reaction between N-bromosuccinimide and hydrogen peroxide was used for the chemiluminescence oxidation of imipramine. A strong chemiluminescence signal was observed when imipramine was mixed with N-bromosuccinimide and hydrogen peroxide under an alkaline condition. The chemiluminescence signal was linearly dependent on the concentration of imipramine in the range of 0.01 - 1.0 mg/L. The detection limit was 0.005 mg/L imipramine and the relative standard deviation was 1.5% for a 0.4 mg/L imipramine solution in 11 repeated measurements. The proposed method was successfully applied to the determination of imipramine in tablets, human plasma and urine samples. 相似文献
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A chemiluminescence (CL) flow system is described for the determination of isoniazid based on its enhancement on the chemiluminescence (CL) emission produced upon mixing a hexacyanoferrate(III) solution with an alkaline luminol solution. The system responds linearly to isoniazid concentration in the range 0–1 mg/L with a detection limit (3σ) of 0.03 μg/L, relative standard deviation (RSD) of 1.2% for 0.1 mg/L isoniazid (n = 11). The system has been successfully applied to the determination of isoniazid in pharmaceutical preparations. 相似文献