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

Table 1

PEG standards identified using paper spray mass spectrometry. The PEG mass spectrum was obtained with both an excitation and detection frequency range of 1.5 MHz.

PEG	Experimental m/z	Theoretical m/z	Mass measurement error (Δppm)	Mass resolving power (M/ΔM50%)	[H(OCH2CH2)nOH+Na]^+
	1009.577639	1009.57651	−0.12	46309	𝑛=22
	1053.60274	1053.60273	0.01	42870	𝑛=23
	1097.62886	1097.62894	−0.07	40306	𝑛=24
	1141.65527	1141.65515	0.02	38791	𝑛=25
	1185.68128	1185.68137	−0.08	37199	𝑛=26
	1229.70779	1229.70758	0.17	35953	𝑛=27
	1273.73391	1273.7338	0.09	34776	𝑛=28
	1317.76035	1317.76001	0.26	33645	𝑛=29
	1361.78640	1361.78623	0.12	32579	𝑛=30
	1405.81232	1405.81244	−0.09	31288	𝑛=31
	1449.83868	1449.83866	0.01	30101	𝑛=32
	1493.86539	1493.86487	0.35	29219	𝑛=33
	1537.89172	1537.89109	0.41	28219	𝑛=34
	1581.91742	1581.9173	0.08	27254	𝑛=35
	1625.94358	1625.94352	0.04	26391	𝑛=36
	1669.96968	1669.96973	−0.03	25567	𝑛=37
	1713.99520	1713.99595	−0.44	24691	𝑛=38