Skip to main content
. Author manuscript; available in PMC: 2010 Jul 12.
Published in final edited form as: Ther Drug Monit. 2008 Oct;30(5):611–619. doi: 10.1097/FTD.0b013e318186e08e

TABLE 1.

Mass Spectrometer Transition and Ionization Mode

Compound
Name
Molecular
Weight (g/mol)
Ionization
Mode
Precursor
Ion
Product
Ion
3TC 222.9 Positive 230.1 112.2
D4T 224.1 Negative 222.9 42.0
CMI 252.3 Negative 250.9 156.9
CMI 252.3 Positive 253.1 159.3
ZDV 267.1 Negative 265.7 222.9
ZDV 267.1 Positive 268.3 127.1
NVP 266.3 Positive 267.2 226.1
NFV 567.0 Positive 568.3 467.2
RTV 721.0 Positive 721.4 268.1
LPV 627.8 Positive 628.7 447.3