共查询到18条相似文献,搜索用时 156 毫秒
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《仪器仪表与分析监测》2017,(2)
丁基黄原酸是地表水环境质量监测项目之一,目前常用的测定方法是《饮用水卫生标准》中规定的铜试剂亚铜分光光度法。分析研究了铜试剂亚铜分光光度法、紫外分光光度法测定水中丁基黄原酸的优缺点,对比了两种方法的工作曲线、检出限、精密度、准确度,比较结果表明,两种方法均能满足实验测定要求,结果差异不大,但各有优劣势。 相似文献
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高效液相色谱法测定兽用氧氟沙星注射液中氧氟沙星的含量 总被引:5,自引:0,他引:5
对高效液相色谱法与紫外分光光度法测定兽用氧氟沙星注射液中氧氟沙星的含量进行了比较.结果表明,高效液相色谱法分离速度快、分离效果好、回收率高,测定结果与<兽药质量标准>2003年版方法无显著性差异. 相似文献
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汪春学 《仪器仪表与分析监测》1994,(4):12-13
硝酸盐在环境中特别是水体中普遍存在,人体摄入硝酸盐后,通过细菌的作用会变成亚硝酸盐,在某种条件下会形成致癌性的亚硝胺类,因此硝酸盐是环境样品监测的重要指标。 硝酸盐的测定方法很多,有酚二磺酸光度法,镉柱还原法,紫外分光光度法,离子色谱法,硝酸根电极法等。近年来由于离子色谱的广泛应用,硝酸盐的分析多数采用离子色谱,而离子色谱是多种阴离子同时 相似文献
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溶菌酶的紫外分光光度法检测 总被引:4,自引:0,他引:4
祁静 《仪器仪表与分析监测》2006,(2):34-36
文章采用紫外分光光度法对蛋清中溶菌酶的含量进行了分析检测,并进行了方法的稳定性、准确度、精密度、检出限、回收率的实验。结果表明,与传统测定溶菌酶的方法比较,紫外分光光度法具有简便、快速、经济、准确等优点。 相似文献
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本文主要阐述了紫外可见分光光度法的发展、国内外UV-VIS分光光度计的性能现状以及紫外可见分光光度法在环境监测中的应用情况,随着UV-VIS仪器性能、计算机技术及分析方法的不断发展,紫外可见分光光度法在环境监测中的应用必将越来越广泛、深入。 相似文献
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Flavonoids are compounds which provide many pharmacological activities. In this paper, the literature with regard to the determination of flavonoids using capillary electrophoresis (CE) during 2008–2017 has been reviewed. The aim of the review is to overview the modes and specific determination conditions of CE for flavonoids. The advantages and disadvantages of CE in the determination of flavonoids are analyzed. The applications of the modes of CE for determination of flavonoids are introduced. Capillary zone electrophoresis, micelle electrokinetic capillary chromatography, microemulsion electrokinetic chromatography, and capillary electrochromatography are considered. Specific determination conditions including the pH, buffer, additive, capillary, voltage, temperature, injection, analysis time, detection, and online concentration methods are summarized. Flavonoids were generally separated in alkaline conditions at pH 8–10 in borate buffer. The advantages of CE are the short analysis time and low solvent consumption compared with the most popular high-performance liquid chromatography protocols. CE can be combined with a variety of detectors including ultraviolet spectrophotometry, mass spectrometry, chemiluminescence, electrochemical, potential gradient, dual opposite carbon fiber microdisk electrodes, and laser-induced fluorescence. In CE, short-light path length results in relative low sensitivity when combined with the most widely used ultraviolet spectrophotometry detector. The combination with more sensitive detectors and online concentration methods such as gradient elution, large volume sample stacking, sweeping, and electrokinetic supercharging alleviates this problem and improves the sensitivity. Capillary electrophoresis is an efficient, green, and valuable tool for the determination of flavonoids. 相似文献
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Drugs with antiepileptic activity constitute a group of heterogeneous compounds and therefore their determination cannot follow a universal procedure. Among them, vigabatrin, pregabalin, and gabapentin are of similar nature, due to their zwitterionic structure. This structure enables similar approaches for their determination, including derivatization protocols. This article presents a thorough survey on published methods for the determination of this subgroup of antiepileptic compounds in bulk and pharmaceutical preparations. Spectrophotometric and spectrofluorimetric methods, with or without derivatization reagents, as thin-layer chromatography, high-performance liquid chromatography with various detectors, gas chromatography, capillary electrophoresis, infrared, and potentiometric methods, have been extensively applied for these compounds, providing reliable results. Additionally, the number of citations and purpose for each method were discussed with critical commentary. 相似文献
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植物叶片中花青素的分析与研究 总被引:32,自引:0,他引:32
本文提供了一种简单快速测定植物叶片中花青素含量的分光光度方法,对美人梅和黄栌叶片中的花青素的提取和测定进行了研究,为开发和利用天然色素提供了一种有效的实验方法。 相似文献
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