Double check if following peaks consistently exist in the GC-MS chromatogram.
m/z Ion Compound
42 (M+H)+ Acetonitrile
59 (M+NH4)+ Acetonitrile
64 (M+Na)+ Acetonitrile
65 (2M+H)+ Methanol
79 (M+H)+ DMSO
83 (2M+H)+ Acetonitrile
85 (M+H)+ d6-DMSO
101 (M+Na)+ DMSO
102 (M+H)+ Triethylamine (TEA)
104/106 (M+Cu)+ Acetonitrile
105 (2M+Na)+ Acetonitrile
120 (M+Na+CH3CN)+ DMSO
122 (M+H)+ Tris
123 (M+H)+ Dimethylaminopyridine (DMAP)
130 (M+H)+ Diisopropylethylamine (DIPEA)
144 (M+H)+ Tripropylamine (TPA)
145/147 (2M+Cu)+ Acetonitrile
146 (3M+Na)+ Acetonitrile
150 (M+H)+ Phenyldiethylamine
153 (M+H)+ 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)
157 (2M+H)+ DMSO
159 (M+Na)+ Sodium trifluoroacetate
169 (2M+H)+ d6-DMSO
179 (2M+Na)+ DMSO
186 (M+H)+ Tributylamine
214 (M+H)+ Unidentified contaminant, maybe related to methanol
225 (M+H)+ Dicyclohexyl urea (DCU)
239/241 [(M.HCl)2-Cl]+ Triethylamine
242 M+ Tetrabutylammonium (C4H9)4N+
243 M+ Trityl Cation
257 (3M+H)+ DMSO
273 M+ Monomethoxytrityl cation (MMT)
279 (M+H)+ Dibutylphthalate (plasticiser)
301 (M+Na)+ Dibutylphthalate (plasticiser)
317 (M+K)+ Dibutylphthalate (plasticiser)
338 (M+H)+ Erucamide
360 (M+Na)+ Erucamide
391 (M+H)+ Diisooctyl phthalate (plasticiser)
413 (M+Na)+ Diisooctyl phthalate (plasticiser)
425 (M+Na)+ Unidentified contaminant (plasticiser)
429 (M+K)+ Diisooctyl phthalate (plasticiser)
449 (2M+H)+ Dicyclohexyl urea (DCU)
454 (M+Na+CH3CN)+ Diisooctyl phthalate (plasticiser)
798 (2M+NH4)+ Diisooctyl phthalate (plasticiser)
803 (2M+Na)+ Diisooctyl phthalate (plasticiser)
Thanks Dr.John Langley@University of Southampton
