Study on the Mass Spectra of Multifunctional Groups Molecule(Ⅵ )-Positive Ions Chemical Ionization Mass Spectrum of Symmetric Molecules(i-C4H10)

篢he mass spectra (CI)of 2, 6-bis (dimethyl-aminomethy)-4-alkylphe (CnH2n+1,n= 2, 4, 8, 10,12)with multifunctional groups in their symmetrical molecules have beeninterpreted and detected. It is found that all quasimolecular ions peaks(M+H)+are basepeaks, the relative abundance of all (M +H)+peaks from proton transfer have no obvious changes with increasement of alkyl chain(CnH2n+1 )localized C4 before and after subtracting isotopic abundance. The abundance of M+' and (M -H)+ peaks are weak andare not relative to length variation 完备 some ions such as (M +3H)+ increase with lengtheningalkyl chain (CnH2n+1 ).