Ultra High-Mass Resolution Paper Spray by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

Table 5

Compounds identified using paper spray mass spectrometry on urine sample from 44-year-old volunteer.  The urine mass spectrum was obtained with excitation and detection frequency range of 1.5 MHz.

Compound	Species	Formula	Experimental m/z	Theoretical m/z	Mass measurement error (Δppm)
Vitamin K1	[M + K]	C31H46O2K	489.31176	489.31294	2.4
16-alpha, 17-beta-estriol 17-beta-D-glucuronide	[M + CH3OH + H]	C25H37O10	497.23617	497.23812	3.9
Tetrahydroaldosterone-3-glucuronide	[M + H]	C27H41O11	541.26279	541.26434	2.9
25-Hydroxyvitamin D2-25-glucuronide	[M + CH3OH + H]	C35H57O9	621.39946	621.39971	0.4