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. Author manuscript; available in PMC: 2014 Jul 29.
Published in final edited form as: Anal Chem. 2006 Mar 15;78(6):1774–1779. doi: 10.1021/ac051121q

Figure 4.

Figure 4

Negative-ion MALDI mass spectra of Arixtra, sodium salt, obtained with DHBB/methanol matrix (panel A) and ImCHCA/methanol matrix (panel B). Fragments due to the sulfate loss are denoted [Fn]−, where [Fn]− = [M − Na − nSO3Na + nH]−. Positive-ion MALDI mass spectra of SOS, sodium salt obtained with DHBB/methanol matrix (panel C) and ImCHCA/methanol matrix (panel D). Fragments due to the sulfate loss are denoted [Fn]+, where [Fn]+ = [M + Na − nSO3Na + nH]+. Peak due to the matrix is marked with triangle.