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Negative ion mass spectrometry of silylated cytokinins
Author(s) -
Hocart Charles H.,
Schlunegger Urs P.
Publication year - 1989
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.1290030208
Subject(s) - chemistry , mass spectrometry , chemical ionization , ion source , electron ionization , ion , reagent , analytical chemistry (journal) , mass spectrum , ionization , ammonia , atmospheric pressure chemical ionization , chromatography , organic chemistry
The negative ion mass spectra or trimethylsilylzeatin riboside and t‐butyldimethylsilylzeatin, generated using either ammonia or 10% CO 2 /Ar as reagent gas, are described. Optimal yields of [M‐H] − ions were obtained with a source pressure of 5 Pa in the electron ionization source of a ZAB‐2F mass spectrometer, compared with 15 Pa to generate [M+H] + in the chemical ionization mode. At 15 Pa no negative ions could be observed.