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原文由 chemist_zm(chemist_zm) 发表:膜拜大佬，利害！！！
ESI离子源背景离子来源
m/z Ion Compound Source of Unknown
33 (M+H)+ methanol
42 (M+H)+ acetonitrile
59 (M+NH4)+ acetonitrile
64 (M+Na)+ acetonitrile
65 (2M+H)+ methanol
74 (M+H)+ dimethyl formamide
79 (M+H)+ DMSO
83 (2M+H)+ Acetonitrile
85 (M+H)+ d6‐DMSO
88 (M+Formic Acid+H)+ acetonitrile
101 (M+Na)+ DMSO
102 (M+H)+ triethylamine (TEA)
104/106 (M+Cu)+ acetonitrile
105 (2M+Na)+ acetonitrile
115
(M+dimethyl
formamide+H)+ acetonitrile
120 (M+Na+CH3CN)+ DMSO
122 (M+H)+
tris,
tris(hydroxymethyl)aminomethane
123 (M+H)+ dimethylaminopyridine (DMAP)
130 (M+H)+ diisopropylethyl amine (DIPEA)
137 (M+CH3CN+NH4)+ DMSO
144 (M+H)+ tripropylamine (TPA)
145/147 (2M+Cu)+ acetonitrile
146 (3M+Na)+ acetonitrile
149 (M+H)+ phthalic anhydride
150 (M+H)+ phenyldiethylamine
153 (M+H)+
1,8‐diazabicycloundec‐7‐ene
(DBU)
157 (2M+H)+ DMSO
159 (M+Na)+ sodium trifluoroacetate
163 dimethyl phthalate
167 dioctyl phthalate
169 (2M+H)+ d6‐DMSO
171 (M+Na)+ phthalic anhydride
179 (2M+Na)+ DMSO
186 (M+H)+ tributylamine
195 (M+H)+ dimethyl phthalate
214 (M+H)+n‐butyl benzenesulfonamide (plastisizer)
225 (M+H)+ dicyclohexyl urea (DCU)
231 (M+NH3)+
n‐butyl benzenesulfonamide
(plastisizer)
236 (M+Na)+
n‐butyl benzenesulfonamide
(plastisizer)
239/241 + triethylamine
242 M+ tetrabutylammonium (C4H9)4N+
243 M+ trityl cation
257 (3M+H)+ DMSO
267 (M+H)+ tributylphosphate
273 M+ monomethoxytrityl cation (MMT)
279 M+ triphenylphosphine oxide
279 M+ dibutylphthalate (plasticiser)
282 (M+H)+ oleamide
slip agent in
polyethylene films
284 (M+H)+ stearamide
slip agent in
polyethylene films
288 (M+H)+
n,n‐bis(2‐hydroxyethyl)
dodecanamide anti‐static agent
301 (M+Na)+ dibutylphthalate (plasticiser)
303 (M+Na)+ oleamide
slip agent in
polyethylene films
317 (M+K)+ dibutylphthalate (plasticiser)
336 (M+H)+ tributyl tin formate
338 (M+H)+ erucamide
slip agent in
polyethylene films
355
siloxane from silica
column
360 (M+Na)+ erucamide
slip agent in
polyethylene films
371 (M+H)+ decamethylcyclopentasiloxane
388 decamethylcyclopentasiloxane
391 (M+H)+ diisooctyl phthalate (plasticiser)
413 (M+Na)+ diisooctyl phthalate (plasticiser)
425 (M+Na)+
unidentified contaminant
(plasticiser)
429 (M+K)+ diisooctyl phthalate (plasticiser)
seen w/ silica capillary
NanoSprayer
445 (M+H)+ dodecamethylcyclohexasiloxane
seen w/ silica capillary
NanoSprayer
449 (2M+H)+ dicyclohexyl urea (DCU)
454 (M+Na+CH3CN)+ diisooctyl phthalate (plasticiser)
also observed w/ high
conc. of formic acid
462 dodecamethylcyclohexasiloxane
503
seen w/ silica capillary
NanoSprayer
519 (M+H)+ tetradecamethylcycloheptasiloxane
seen w/ silica capillary
NanoSprayer
522
Derived from rubber
tip from disposable
syringe plunger
531 (M+H)+
seen w/ Nunc
polypropylene tubes
536
seen w/ silica capillary
NanoSprayer
538 (acetate)n+(Fe)n+
observed w/ high conc.
of acetic acid
550
Derived from rubber
tip from disposable
syringe plunger
553 (M+Na)+
seen w/ Nunc
polypropylene tubes
555 (acetate)n+(Fe)n+
observed w/ high conc.
of acetic acid
569 (M+K)+
seen w/ Nunc
polypropylene tubes
587 (M+H)+
seen w/ Vanguard
polypropylene tubes
593 (M+H)+ hexadecamethylcyclooctasiloxane
609 (M+Na)+
seen w/ Vanguard
polypropylene tubes
610
seen w/ silica capillary
NanoSprayer
625 (M+K)+
seen w/ Vanguard
polypropylene tubes
638
seen w/ silica capillary
NanoSprayer
667 (M+H)+ octadecamethylcyclononasiloxane
675
seen w/ new PEEK
tubing
679 (M+H)+
from purified water
and solvent filters
684
seen w/ silica capillary
NanoSprayer
696 (M+NH4)+
from purified water
and solvent filters
701 (M+Na)+ from purified water
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