Results 161 to 170 of about 911,645 (210)
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Liquid Chromatography: Mass Spectrometry of Isoflavones

Journal of Medicinal Food, 1999
High-performance liquid chromatography (HPLC) or capillary electrophoresis (CE) is particularly suited to the separation and analysis of a wide range of biological compounds. When investigating such compounds in complex matrices (e.g., blood, tissue, urine, foods), specificity of the detection method becomes an important issue.
S, Barnes   +3 more
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Chromatography-mass spectrometry

Journal of Analytical Chemistry, 2011
The review describes the most significant achievements of Russian scientists during last 20 years in developments and improvements of methods combining mass spectrometry and gas chromatography or HPLC for the analysis of organic compounds of different origin in various matrices.
openaire   +1 more source

Chromatography, Mass Spectrometry

Chemical & Engineering News Archive, 1997
Even though more high-performance liquid chromatography (HPLQ) instruments are in use than are gas chromatography (GQ) units, GC is much more likely to be paired with mass spectrometry (MS) than is liquid chromatography (LC), according to the 1997 Analytical Instrument End User Study conducted by K. C. Associates, Wilmington, Del.
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Thin layer chromatography/mass spectrometry

Journal of Chromatography A, 2011
Thin layer chromatography (TLC)--a simple, cost-effective, and easy-to-operate planar chromatographic technique--has been used in general chemistry laboratories for several decades to routinely separate chemical and biochemical compounds. Traditionally, chemical and optical methods are employed to visualize the analyte spots on the TLC plate.
Sy-Chyi, Cheng   +2 more
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Combination gas chromatography‐mass spectrometry

Journal of the American Oil Chemists' Society, 1967
AbstractThe direct combination of gas‐liquid chromatography with mass spectrometry represents one of the most powerful techniques available for the analysis of complex mixtures of lipids. Principal advantages are the extremely small amounts of material required, the relative speed of analysis, and the wealth of molecular structural information ...
Leemans, F.A.J.M., McCloskey, J.A.
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Introduction to Gas Chromatography-Mass Spectrometry

2013
Gas chromatography-mass spectrometry (GC-MS) is a technique of pivotal importance for the analysis of hormones in biological fluids. In consequence, it has gained relevance in clinical and endocrinological laboratories, providing reference analytical methods.
Alberto, Sánchez-Guijo   +2 more
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Analysis of flavonoids in tablets and urine by gas chromatography/mass spectrometry and liquid chromatography/mass spectrometry

Rapid Communications in Mass Spectrometry, 1998
A method was developed for the analysis and characterization of quercetin and kaempferol in urine following ingestion of Ginkgo biloba tablets. The method utilized gas chromatography/negative ion chemical ionization mass spectrometry of the trimethysilyl derivatives of the flavonoids.
Watson, D. G., Pitt, A. R.
openaire   +4 more sources

Integrated gas chromatography-mass spectrometry

Quarterly Reviews of Biophysics, 1973
Mass spectrometric analysis of organic compounds was in the early 1950s done mostly for quantitative determination of petroleum products. The use of the mass spectrometer for qualitative analysis of solid organic material samples was shown by O'Neil & Wier (1951) and since then a continuous increase in mass spectrometric studies of different ...
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Liquid Chromatography–Mass Spectrometry

2013
INTRODUCTION Liquid Chromatography and Sample Pretreatment Mass Spectrometry TECHNOLOGY Strategies in LC-MS Interfacing History of LC-MS Interfaces Interfaces for Atmospheric-Pressure Ionization Atmospheric-Pressure Ionization APPLICATIONS: SMALL MOLECULES LC-MS Analysis of Pesticides Environmental Applications of LC-MS LC-MS in Drug Discovery and ...
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Characterization of powdered turmeric by liquid chromatography-mass spectrometry and gas chromatography-mass spectrometry

Journal of Chromatography A, 1996
Five commercial powdered turmeric samples were analyzed to identify major and minor components. The developed HPLC method allows the separation of curcumin, demethoxycurcumin and bisdemethoxycurcumin, as well as three other major components and numerous minor components.
Richard Hiserodt   +3 more
openaire   +1 more source

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