Changes in brain serotanin and 5-hydroxyindalacetic acid levels induced by 2,4-dichlorophenoxyacetic butyl ester
The mean (SD) retention times of the butyl ester
derivatives of L-arginine, ADMA, and SDMA, respectively, were 1.
Formamidene butyl esters of amino acids afford more stable ions than the corresponding butyl esters during electrospray ionization-MS/MS analysis (6).
Analysis of amino acids as formamidene butyl esters by electrospray ionization tandem mass spectrometry.
of the butyl ester of octanoylcarnitine (m/z 344) and its internal calibrator [[sup.
Analysis of acylcarnitines after derivatization as butyl esters was recently proposed .
Tuning of the instrument was optimized with a solution containing deuterium-labeled calibrators prepared as butyl esters as described previously .
Propyl and butyl esters were obtained only under acid catalysis.
Ethyl, propyl, and butyl esters with the corresponding alcohols can be obtained in high yields in in situ alcoholysis of soybean oil from soybeans .
We report the validation of a high-throughput method for the analysis of acylcarnitine butyl esters in infants with these disorders and include the results from a prospective study of the occurrence of PA and MMA in nearly 1 million newborns screened using MS/MS.
Samples were prepared and analyzed for acylcarnitines as butyl esters by electrospray MS/MS as described recently (12, 18).
The product ion spectra for the butyl esters of C3 and its internal standard, [[sup.