
Appendix F Reference Standard Information
F-4 PerSeptive Biosystems
F
F.2 Conversion of Mass to
Time for Typical Standards
The table below includes mass and time values for standards
under different acquisition conditions (Accelerating Voltage
and flight tube length). You can use this information when
observing the signal on the oscilloscope to determine if the
peaks you are seeing are at the correct mass.
NOTE: These values are not exact. Use them as a guide.
Standards Z
Average MW
[M+H]
+
Time (seconds)
25,000 V
1.3 m
10,000 V
1.3 m
28,000 V
2.0 m
15,000 V
2.0 m
10,000 V
2.0 m
Leucine
Enkephalin
1 556.61 1.40E-05 2.21E-05 2.03E-05 2.77E-05 3.40E-05
Methionine
Enkephalin
1 574.65 1.42E-05 2.24E-05 2.06E-05 2.82E-05 3.45E-05
Bradykinin 1 1061.2 1.93E-05 3.05E-05 2.80E-05 3.83E-05 4.69E-05
2 531.1 1.36E-05 2.16E-05 1.98E-05 2.71E-05 3.32E-05
Angiotensin II
(human)
1 1047.18 1.92E-05 3.03E-05 2.78E-05 3.80E-05 4.66E-05
2 524.09 1.35E-05 2.14E-05 1.97E-05 2.69E-05 3.30E-05
Angiotensin I
(human)
1 1297.48 2.13E-05 3.37E-05 3.10E-05 4.23E-05 5.19E-05
2 649.24 1.51E-05 2.38E-05 2.19E-05 3.00E-05 3.67E-05
Melittin 1 2847.5 3.16E-05 4.99E-05 4.59E-05 6.27E-05 7.68E-05
2 1424.25 2.23E-05 3.53E-05 3.25E-05 4.44E-05 5.43E-05
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