Oxford Liquid Chromatography Isotope Ratio Mass Spectrometry Meeting
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چکیده
منابع مشابه
Derivatization in mass spectrometry --7. On-line derivatisation/degradation.
The review describes on-line derivatization/degradation methods employed in mass spectrometry to solve some structural and analytical problems. Advantages and applications of various positions of reaction systems connected mainly to a mass spectrometer or a gas chromatograph/mass spectrometer are considered. Among these are reaction systems connected directly to the mass spectrometer (reaction ...
متن کاملDetermination of uric acid in human serum by isotope dilution-mass spectrometry. Definitive methods in clinical chemistry, III.
A method for the measurement of uric acid in human serum by isotope dilution-mass spectrometry is described. The analytical procedure consists of the following steps: Addition of [1,3-15N2]uric acid to the serum sample; ion exchange chromatography on AG1-X2; formation of the trimethylsilyl derivative; gas liquid chromatography-mass spectrometry (GC-MS), selected ion monitoring (SIM) at m/z-valu...
متن کاملDetermination of creatinine in human serum by isotope dilution-mass spectrometry. Definitive methods in clinical chemistry, IV.
A method for the determination of creatinine in human serum by isotope dilution-mass spectrometry is described. The analytical procedure comprises the following steps: Addition of [13C,15N2 )creatinine to the serum sample; ion exchange chromatography on the cation exchange resin AG 50W-X2; formation of the trimethylsilyl derivative; gas liquid chromatography-mass spectrometry (GC-MS); selected ...
متن کاملQuantification of serum and urinary S-adenosylmethionine and S-adenosylhomocysteine by stable-isotope-dilution liquid chromatography-mass spectrometry.
BACKGROUND We have developed an assay that uses stable-isotope-dilution liquid chromatography-mass spectrometry to assess S-adenosylmethionine (SAM) and S-adenosylhomocysteine (SAH) in body fluids to investigate the relationship of these metabolites to hyperhomocysteinemia. METHODS Commercially obtained SAM (D(3) methyl) and (13)C(5)-SAH uniformly labeled in the adenosyl moiety, which was syn...
متن کاملLiquid chromatography/mass spectrometry stable isotope analysis of dissolved organic carbon in stream and soil waters.
A commercial interface coupling liquid chromatography (LC) to a continuous-flow isotope ratio mass spectrometry (CF-IRMS) instrument was used to determine the δ(13) C of dissolved organic carbon (DOC) in natural waters. Stream and soil waters from a farmland plot in a hedgerow landscape were studied. Based on wet chemical oxidation of dissolved organics the LC/IRMS interface allows the on-line ...
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