共查询到18条相似文献,搜索用时 78 毫秒
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流动注射化学发光法测定利血平 总被引:9,自引:0,他引:9
研究了利血平在酸性条件下与高锰酸钾和过氧化氢产生化学发光的行为,建立了流动注射化学发光测定利血平的新方法。利血平的浓度在1.0×10^-6 ̄8.0×10^-5h/mL范围内与化学发光强度呈良好的线性关系;检出限为3×10^-7g/mL。对6×10^-6g/mL利血平进行11次平行测定,得方法的相对标准偏差为1.3%。方法用于药剂中利血平含量测定,结果与药典标准方法测得值一致。 相似文献
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流动注射化学发光法测定异烟肼 总被引:11,自引:0,他引:11
报道一种微量测定抗结核药物剧烟的新方法,方法是基于异烟肼对鲁米诺-锰(Ⅱ)-高碘酸钾化学发光反应的增敏作用,建立了微量异烟肼流的流动注射化学发光分析法。 相似文献
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基于Fe(Ⅲ)氧化硫脲生成Fe(Ⅱ)的反应和Luminol-O2-Fe(Ⅱ)化学发光反应相偶合,建立了流动注射化学发光测定硫脲的方法。方法检出限为4×10-7mol.L-1,RSD为2%(n=11),方法用于白葡萄酒中硫脲的分析测定,结果满意。 相似文献
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流动注射化学发光法检测水相中溶解臭氧浓度 总被引:3,自引:0,他引:3
基于碱性水溶液中臭氧氧化鲁米诺产生化学发光的现象,建立了利用流动注射化学发光技术检测水体溶解臭氧(DO3)的方法。检测了较高和较低两部分的DO3浓度范围,低浓度DO3从20μg/L到65μg/L,工作曲线为y=27.658In(X)-192.75;检出限为8.5μg/L(7次空白信号检测);高浓度D03从0.089mg/L到0.890mg/L,线性关系为y=0.0018x-23.711。溶液中的。DO3由靛蓝二磺酸钠法确定。随后利用化学发光系统检测鼓人臭氧气体的自来水,由工作曲线可以确定自来水中DO3的量。方法简便,结果准确。 相似文献
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流动注射化学发光法测定扑热息痛 总被引:12,自引:0,他引:12
研究发现在碱性条件下 ,扑热息痛对鲁米诺 -铁氰化钾体系发光反应具有强烈的抑制作用 ,据此建立了流动注射化学发光测定痕量扑热息痛的新方法。扑热息痛浓度在 4 .0× 1 0 - 5~1 .0× 1 0 - 3g L范围内与发光强度呈良好的线性关系 ;检出限 ( 3σ)为 2 .4× 1 0 - 6 g L。相对标准偏差 (C =8.0× 1 0 - 4 g L ,n =1 1 )为 2 .3 %。方法用于片剂中扑热息痛含量测定 ,结果与标准方法一致。讨论了此体系发光机理 相似文献
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Determination of Gossypol in Trace Level by Flow Injection Analysis with Chemiluminescence Detection
Bing Chun XUE Er Bao LIU College of Chemistry Life Sciences Tianjin Normal University Tianjin 《中国化学快报》2006,17(1):57-60
Gossypol, [1, 1′, 6, 6′, 7,7′-hexahydroxyl-5,5′-diisopropyl-3,3′-dimethyl-(2,2′-binaphtha- lene)-8,8′-dicarboxaldehyde] is a polyphenolic yellow compound naturally occurring in various parts of cotton plants1. The compound has been associated with 相似文献
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José A. Murillo Pulgarín Luisa F. García Bermejo Armando Carrasquero Durán 《Analytical letters》2017,50(1):186-196
This study reports a simple and rapid method for the determination of the antioxidant activity of the phenolics present in plants of the Hibiscus genus. The protocol is based on the ability of the phenolic compounds to inhibit luminol chemiluminescence through the inactivation of free radicals in a flow injection system. Using the optimized operational conditions, the antioxidant activities of several phenolics were measured. The results were explained on the basis of structure–reactivity relationships. The antioxidant activities of dried flowers of Hibiscus rosa-sinensis and Hibiscus sabdariffa were evaluated. The protocol was validated by the 2,2-diphenyl-1-picrylhydrazyl-hydrate free radical assay. The differences in the antiradical activities were explained based on the concentrations of total polyphenol and flavonoid concentrations determined by spectrophotometric methods. It was concluded that the chemiluminescence method was complementary for the evaluation of hydrophilic antioxidants in plants. 相似文献