共查询到16条相似文献,搜索用时 93 毫秒
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本文采用高效液相色谱-质谱-质谱联用法对烯草酮样品进行分离分析.得到烯草酮及其6种杂质的一级、二级质谱图,并总结烯草酮各杂质的结构,计算准确分子量.有助于烯草酮杂质的分析,有利于控制烯草酮原药中的杂质. 相似文献
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本文采用气-质联用(GC—MS)法对乙氧氟草醚原药及其原药中的杂质进行分析鉴定,了解乙氧氟草醚原药中的杂质情况和质量状况,并结合合成路线,分析产生杂质原因,用以指导工业生产。 相似文献
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在对唑草酮进行残留分析试验的过程中,对其浓度的分析检测方法有很多。通过HPLC和LC-MS对唑草酮原药的检测比较,得到HPLC对唑草酮的LOD为0.011 mg/L,LOQ为0.036 mg/L;LC-MS对唑草酮的LOD为0.036 ng/L,LOQ为2.04 ng/L,且HPLC和LC-MS对唑草酮原药的检测方法都具有易操作、分离特性好的特点,但LC-MS的检出限比HPLC低,推荐LC-MS适合用来分析唑草酮含量较低的样品,而HPLC适合用来分析唑草酮含量较高的样品。 相似文献
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Gas and liquid chromatographic methods were evaluated for determining the impurities in technical grade fenitrothion (≥95%). These impurities were S-methyl fenitrothion. fenitrooxon, bis-fenitrothion, S-methyl-bis-fenitrothion and 3-methyl-4-nitrophenol. The GC proved to be insensitive to the two bis compounds whereas these compounds could be analysed by liquid chromatography on a Corasil 11 column or on an OPN column. Nine technical samples were analysed and S-methyl fenitrothion, a potent anticholinesterase agent, was by far the most common impurity. 相似文献
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三氯杀螨醇原药及其杂质的GC—MS分析 总被引:2,自引:0,他引:2
本文采用GC-MS法对三氯杀螨醇原药及其杂质进行分析和鉴定,得到原药及其主要杂质的GC-MS谱图,并得出定性定量结果,结果表明三氯杀螨醇原药中含有一定量的DDT、DDE等杂质。 相似文献
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John P. G. Wilkins 《Pest management science》1990,29(2):163-181
The mass spectrometric and gas chromatographic behaviour of a series of O,O-dialkyl O-(substituted phenyl) phosphorothioates, and some related compounds is reported. Several of these compounds are widely used as pesticides. Appraisal of these data has permitted an increased understanding of the influence of phenyl substituents on the appearance of the mass spectra of these compounds. In particular, the nature and extent of mass spectrometric ortho effects, which are associated with weak molecular ion intensity, and/or the generation of rearrangement ions are reported. Examples in which an understanding of these effects has been helpful in the identification of related compounds, such as technical impurities and degradation products, are given. Published mass spectrometric data for some of these compounds are critically appraised. 相似文献
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有效碳数法研究及其在农药气相色谱分析中的应用 总被引:2,自引:0,他引:2
有机化合物结构与其所含有的有效碳数有一定的关系,本文给出了20类结构化合物及其所含有有效碳数的关系,并对理论计算值和实测值进行了比较,结果十分接近,利用有效碳数法可以设计农药分析实验方案和无标样的情况下测定农药杂质含量。 相似文献