共查询到20条相似文献,搜索用时 15 毫秒
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Georg Raber Sakda Khoomrung Mojtaba S. Taleshi John S. Edmonds Kevin A. Francesconi 《Talanta》2009,78(3):1215-97
Arsenic-containing hydrocarbons have recently been reported as natural constituents of fish oil. We report a simple method for determining these compounds by GC/MS. Application of the methodology will delineate the distribution of these novel arsenic compounds in foods, and facilitate an assessment of the toxicological implications. 相似文献
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Summary Combined capillary gas chromatography/mass spectrometry has been used to characterize the basic fraction of Mexican marijuana and standard tobacco smoke condensates. A thermostable Superox-coated glass capillary column permitted elution of relatively large nitrogen-containing compounds. Substantial qualitative and quantitative differences between the two materials were noted.Dedicated to Dr. L. S. Ettre on the occasion of his 60th birthday. 相似文献
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用毛细管GC/MS和GC/FTIR研究挥发油的化学成分 总被引:3,自引:0,他引:3
本文用毛细管GC/MS和GC/FTIR对异叶青兰和鼠曲草两种植物挥发油的化学成分进行了研究,讨论了两种方法分析挥发油化学成分的优点和局限性。 相似文献
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调味品中氯丙醇的GC/ECD和GC/MS/MS衍生化检测方法研究及应用 总被引:8,自引:0,他引:8
报道了调味品中氯丙醇的衍生化气相色谱(GC/ECD)和衍生化气相色谱双串联质谱法(GC/MS/MS)测定。GC/ECD测定酱油中3—氯—1,2—丙二醇(3—MCPD)的检出限达到0.01mg/kg,回收率为91%~104%,变异系数为2.27%~7.96%;GC/MS/MS同时测定酱油中1,3—二氯—2—丙醇、2,3—二氯—1—丙醇和3—氯—1,2—丙二醇,1,3—二氯—2—丙醇、2,3—二氯—1—丙醇的检出限为0.02mg/kg,3—氯—1,2—丙二醇的检出限为0.01mg/kg,回收率在92%~106%,变异系数为3.51%~13.33%。 相似文献
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L. G. Rushing A. B. Gosnell C. L. Holder W. A. Korfmacher W. Slikker 《Journal of separation science》1986,9(8):435-440
A high resolution gas chromatographic method is described for the separation of rhesus monkey urinary metabolites of doxylamine with the use of on-column injection, a fused silica column (DB-1701), and nitrogen/phosphorus detection. An ancillary separation of doxylamine and six other antihistamines is also presented. 相似文献
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K. J. Hyver 《Journal of separation science》1988,11(1):69-72
For clinical and environmental analyses utilizing capillary gas chromatography/mass spectrometry (GC/MS), increased sensitivity and speed of analysis are highly desirable. These performance advantages are realized using a WCOT column of 100 μm i.d. as compared to the more conventional 200 μm i.d. capillary columns. The improved sensitivity of capillary direct GC/MS with the 100 μm i.d. column for the confirmation of drugs of abuse will be demonstrated. For environmental analysis, the superior efficiency and resolution of the 100 μm i.d. column can be employed for the separation of priority pollutants. This approach is more amenable to capillary direct GC/MS providing a more effective interface to the mass spectrometer. As a result improved sensitivity and a considerable decrease in analysis time is achieved over that obtained with the larger diameter environmental specialty phase columns. 相似文献
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介绍从南沙海域采集的RhaphisiapallidaRidley海绵样品中分离得到的混合甾类样品,采用气相色谱质谱法鉴定其组分。应用质谱裂解规律结合计算机检索确定了十一种甾体化合物的结构,其中两个是首次在海绵生物中发现的甾体激素化合物。 相似文献
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A. D. Sauter L. D. Betowski T. R. Smith V. A. Strickler R. G. Beimer B. N. Colby J. E. Wilkinson 《Journal of separation science》1981,4(8):366-384
Operational characteristics have been determined for fused silica capillary column (FSCC) GC/MS as applied to “extractable” priority polutants. Chromatographic data show excellent relative retention time (RRT) intralaboratory precision and interlaboratory accuracy when multiple internal standards are empolyed. Potential chromatographic problems, such as column overload and “double peaking”, are addressed. Response factor relative standard deviations (RSD) at 50 ng for most of the extractable priority pollutants over the long term indicated precise determination (i.e. RSD generally ≤ 10%). Linearity was demonstrated over two orders of magnitude for FSCC GC/MS analysis of compounds with relatively low and high RF (response factor) values. Potential quantitative problems, such as saturation, are discussed. For certain aromatic priority pollutants interlaboratory RF agreement was observed. This was noted as perhaps the most important property of FSCC GC/MS analysis when the multiple internal standard approach is utilized. Determinations of extractable priority pollutants are directly compared for paced column GC/MS and FSCC GC/MS analysis of separate and composited extracts. For six extracts analyzed in triplicate, the latter configuration was shown to produce more consistent results. In view of the superior analysis logistics of composite extract FSCC GC/MS analysis, this approach was established as the preferred method for the analysis of priority pollutants classified as extractable. 相似文献
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乙酰乙酸乙酯烯醇式与酮式GC/MS和GC/IR分析 总被引:1,自引:0,他引:1
采用GC/MS对乙酸乙酯烯醇式在不同离子源温度,接口温度,进样器温度,柱温等条件下的气相色谱行为进行了研究,用重氢交换法和高分辨质谱法对烯醇式和酮式的质谱进行了解析,并通过GC/IR研究了烯醇式和酮式的红外光谱。 相似文献
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从充分利用气相色谱/质谱(GC/MS)提供的信息来鉴定GC流出组分的目的出发,并以脂肪醇分析为例讨论了GC保留指数在MS谱图解析及MS鉴定结果的合理性检验方面的作用。总结了GC保留的同系物规律、极性规律、加和规律及异构物规律来指导MS谱图解析。提出了含氧化合物官能团相对于-CH2-质量数的保留指数附加贡献值辅助MS确定化合物的类别。同时采用了GC/MS中选择离子检测方法(SIM)在分子离子峰受噪音干扰或太弱以至完全未观测到时来进一步佐证其相对分子质量。 相似文献
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I. L. Davies M. W. Raynor D. J. Urwin K. D. Bartle M. Tolay E. Ekinci H. E. Schwartz 《Journal of separation science》1988,11(11):792-799
This work describes the analysis of a pyrolysis product of a lignite sample obtained from the Turkish Goynuk reserve. The aliphatic, aromatic and polar compounds present in the tar are separated and identified by various chromatographic techniques: Capillary gas chromatography/mass spectrometry (GC/MS), on-line high performance microbore liquid chromatography/capillary gas chromatography (LC/GC) and capillary supercritical fluid chromatography (SFC). The suitability of each technique for this particular application is discussed, and semi-quantitative results are presented for the major components detected. 相似文献
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Gambelunghe C Sommavilla M Ferranti C Rossi R Aroni K Manes N Bacci M 《Biomedical chromatography : BMC》2007,21(4):369-375
A simple and sensitive gas chromatography/tandem mass spectrometry (GC/MS/MS) method is described for the detection of anabolic steroids, usually found in keratin matrix at very low concentrations. Hair samples from seven athletes who spontaneously reported their abuse of anabolic steroids, and in a single case cocaine, were analyzed for methyltestosterone, nandrolone, boldenone, fluoxymesterolone, cocaine and its metabolite benzoylecgonine. Anabolic steroids were determinate by digestion of hair samples in 1 m NaOH for 15 min at 95 degrees C. After cooling, samples were purificated by solid-phase and liquid-liquid extraction, then anabolic steroids were converted to their trimethylsilyl derivative and finally analyzed by GC/MS/MS. For detection of cocaine and benzoylecgonine, hair samples were extracted with methanol in an ultrasonic bath for 2 h at 56 degrees C then overnight in a thermostatic bath at the same temperature. After the incubation, methanol was evaporated to dryness, and benzoylecgonine was converted to its trimethylsilyl derivative prior of GC/MS/MS analysis. Results obtained are in agreement with the athletes' reports, confirming that hair is a valid biological matrix to establish long-term intake of drugs. 相似文献