Without knowing more it is not so easy to answer. Do you want to measure the analyte in solid form (including the ammonium salts) or is it enough for you to measure the analyte itself? E.g. if solid form only then you could also think of DESI (or one of it's variants) as a viable ionization method.

And what is the end result you would want? Quantification of the analyte or confirmation of molecular mass via accurate mass or something else?

Sigurður Smárason, thanks your answer. I need to see molec mass for determination of my compound. Structure of my compound is multicyclophane(pentakis) - core (cyclophane) with 4 tertary amino group alkylated with mono bromine derivative of cyclophane. I added the maldi of my compound. But i have 4 charged group and i think maldi is not suitable for this.

Thanks for the added information. Given your MALDI results I would definitely try ESI or any other liquid ionization technique. Since you have four permanent charges you should have no problem getting an ion. The mass range however is a concern as your compound is large. You would expect to see a signal around 1770 m/z (+4 charge), and as long as the mass spec with the ESI can see ions in that range you should be fine.

I support Sigurður's answer. To determine the charge state, you should examine the isotope pattern (1 m/z unit between peaks for one charge, 0.5 for charge +2, etc.) with the complication of the presence of bromine, if any. I can't see if this determination is possible on the MALDI spectrum. In your case, if ESI gives the molecular ion @ +4, you may see C-13 isotope peaks with 0.25 m/z interval if your MS resolution is sufficient (R>5000, probably 10000 necessary). Using a spectrum simulator may be very helpful to visualize the shape of the isotope pattern, even if the resolution is not sufficient to observe separate separate peaks.