ISSN:
0887-6134
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A Hewlett-Packard 5988A quadrupole mass spectrometer was tuned systematically using a protocol for establishing the negative chemical ionization (NCI) operating conditions. The methane-enhanced NCI mass spectra of 22 s-triazines were then measured at ion source temperatures of 100°C and 250°C and are reported here. For 20 of the compounds the M-. or [M - 1]- ion was observed. Fragmentation patterns for 2-Cl, 2-SCH3 and 2-OCH3 substituted s-triazines are contrasted. For the 2-Cl substituted compounds fragment ions are more abundant at 250°C than at 100°C. For the 2-SCH3 substituted s-triazines, on the other hand, several fragment ions are noted at greater abundance at 100°C than at 250°C. In addition to the fragment ions observed, a number of unusual adduct ions are noted, including [M + 13]-, [M + 14]-, [M + 25]- and [M + 28]-.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bms.1200180929
