ISSN:
0306-042X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The incorporation of a conversion dynode, positioned in the available space between the ion exit hole of the quadrupole and the entrance of the electron multiplier permits the detection of negative ions when this dynode is held at a high positive potential (4 kV). The system makes use of the original electron multiplier and does not require additional electrical feedthroughs into the vacuum system. The conversion dynode is also used for positive ion detection. It is then kept at -4 kV and helps to increase the gain for high mass ions, to reduce mass discrimination and to improve the signal to noise ratio.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bms.1200100109
