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. Author manuscript; available in PMC: 2014 Nov 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2013 Apr 17;24(11):1700–1709. doi: 10.1007/s13361-013-0605-1

Table 1.

Peak area RSDs of tested neuropeptides under different injection protocols. Adding wash injection and injecting peptide with internal standard significantly improves injection reproducibility.

Injection type Peak Area RSD (DynA1–8) Peak Area RSD (LE) Peak Area RSD (ME)
No column rinsing (n = 30) 20.2% 18.5% 46.0%
Wash injection every 6 injections (n = 27) 15.4% 8.4% 9.1%
Peak Area RSD (dLE) Peak Area RSD (LE) Peak Area ratio RSD (LE/dLE)
Injection of LE and internal standard (with wash injection) (n = 27) 9.2% 9.3% 4.3%