Abstract
Eighteen organophosphorus pesticides were studied by combined high-performance liquid chromatography-negative chemical ionization mass spectrometry (HPLC-NCI-MS). The LC separation was done on a reversed-phase C 8 column, using acetonitrile-water (60:40) as mobile phase. The MS analysis was done on-line, using a direct liquid-insertion probe LC-MS interface. The negative-ion mass spectra obtained under these LC-MS conditions are very simple and are very similar to those reported for methane-enhanced negative ionization. Molecular ions are generally not present in either mode, but intense fragment ions containing useful structural information are usually observed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
