2,4-DNPH	2,4-dinitrophenylhydrazine
PFPH	pentafluorophenyl hydrazine
2-PB	2-picoline borane
4-APC	4-(2-(trimethylammonio)ethoxy)benzenaminium halide
4-APEBA	4-(2-((4-bromophenethyl)dimethylammonio)ethoxy)benzenaminium dibromide
HIQB	N,N,N-triethyl-2-hydrazinyl-2-oxoethanaminium bromide
QDA	N-[2-(aminooxy)ethyl]-N,N-dimethyl-1-dodecylammonium
TSH	p-toluenesulfonylhydrazine
PFB-Br	2,3,4,5,6-pentafluorobenzyl bromide
HTMOB	4-hydrazino-N,N,N-trimethyl-4-oxobutanaminium iodide
DBD-H	4-(N,N-dimethylaminosulfonyl)-7-hydrazino-2,1,3-benzoxadiazole
4-MPD	4-methoxy-o-phenylenediamine
FMOC-hydrazine	9-fluorenylmethoxycarbonyl hydrazine
PFBHA/PFBOA	o-2,3,4,5,6-pentafluorobenzyl)hydroxylamine hydrochloride
ATM	2-(aminooxy)ethyl-N,N,N-trimethylammonium iodide
AMAH	4-(2-aminooxyethyl)-morpholin-4-ium chloride
TBARS	thiobarbituric acid reactive substances
2-TBA	2-thiobarbituric acid
TFEH	2,2,2-trifluoroethylhydrazine
FAP-1/FP 1	formaldehyde probe 1
DEAC	diethylaminocoumarin
DAN	diaminonapththalene
RBH	rhodamine B hydrazide
DDB	1,2-diamino-4,5-dimethoxybenzene
MSTFA	N-methyl-N-trimethylsilyl-trifluoroacetamide
2-AA	2-aminoacridone
3-dG	3-deoxyglucosone
BODIPY aminozide	1,3,5,7-tetramethyl-8-aminozide-difluoroboradiaza-s-indacence
5-HMF	5-hydroxymethylfurfural
4-HBA	4-hydrazinobenzoic acid
DnsHz	dansylhydrazine
9,10-PQ	9,10-phenanthrenequinone
T3	2,4-bis-(diethylamino)-6-hydrazino-1,3,5-triazine
TMPP-AcPFP	S-pentafluorophenyl tris(2,4,6-trimethoxyphenyl)phosphonium acetate bromide
TMPP-PrG	4-hydrazino-4-oxobutyl)[tris(2,4,6-trimethoxyphenyl)phosphonium bromide
TCPH	2,4,6-trichlorophenylhydrazine
SALLE	salting-out assisted liquid–liquid extraction
DLLME	dispersive liquid–liquid microextraction
SIL-SPE-LC-DPIS-MS	stable isotope labeling-solid phase extraction-liquid chromatography-double precursor-ion scan mass spectrometry
DNLS-MS	double neutral loss scan mass spectrometry
HR-AM	high resolution accurate mass
MTS	mainstream tobacco smoke
EBC	exhaled breath condensate
ESI	electrospray ionization
APCI	atmospheric pressure chemical ionization
APPI	atmospheric pressure photoionization
UHPLC	ultra-high performance liquid chromatography
SWATH	sequential window acquisition of all theoretical fragment-ion spectra
QqTOF	quadrupole time-of-flight
UHR-FT MS	ultra-high resolution fourier transform mass spectrometry
LC-MSn	liquid chromatography tandem mass spectrometry
4-HNE	4-hydroxy-2-nonenal
4-HHE	4-hydroxy-2-hexenal
MDA	malondialdehyde
CID	collision-induced dissociation
HCD	high-energy C-trap dissociation
AIDA	alternate isotope-coded derivatization