AA	Ascorbic acid
AAS	Atomic Absorption Spectrometer
Ala	Alanine
AOAC	Association of Official Analytical Chemists
APCI	Atmospheric pressure chemical ionization
AQC	6-aminoquinolyl-N-hydroxysuccinimidyl carbamate
Arg	Arginine
ASE	Accelerated solvent extraction
Asp	Aspartate
Asn	Asparagine
ATR-FTIR	Attenuated total reflection Fourier-transform infrared spectroscopy
BCAA	Branched-chain amino acids
β-Ala	β-alanine
CE	Capillary electrophoresis
CD	Conductometric detector
CITP	Capillary isotachophoresis
Cit	Citrulline
CLA	Conjugated linoleic acid
Cys	Cysteine
DAD	Diode array detector
DEEMM	diethylethoxymethylenemalonate
DHAA	Dehydroascorbic acid
DLLME	Dispersive liquid-liquid microextraction
DMPP	2,4-dimethoxy-6-piperazin-1-yl pyrimidine
DSPE	Dispersive solid-phase extraction
2D-LC	Two-dimensional liquid chromatography
EAA	Essential amino acid
ECF	Ethylchloroformate
ED	Electrochemical detector
ED-XRF	Energy-dispersive X-ray fluorescence
EDTA	Ethylenediaminetetraacetic acid
ELSD	Evaporative light scattering detector
ESI	Electrospray ionization
FA	Fatty acid
FAA	Trifluoroacetylacetone
FABE	Fatty acid butyl esters
FAME	Fatty acid methyl esters
FCD	Food composition database
FCT	Food composition tables
FFA	Free fatty acid
FID	Flame ionization detection
FLD	Fluorescence detector
FMOC	9-fluorenylmethyl chloroformate
FOS	Fructo-oligosaccharides
FSV	Fat-soluble vitamin
GABA	γ-aminobutyric acid
GC	Gas chromatography
GCE	Glassy carbon electrode
GCPE	Glassy carbon paste electrode
GLC	Gas-liquid chromatography
Gln	Glutamine
GLP	Good laboratory practice
Glu	Glutamic acid
Gly	Glycine
HCl	Hydrochloric acid
His	Histidine
HPLC	High performance liquid chromatography
HRMS	High resolution mass spectrometry
IAA	Indispensable amino acids
ICP-MS	Inductively coupled plasma-mass spectrometer
ICP-OES/AES	Inductively coupled plasma–optical emission spectrometry/atomic emission spectrometry
IEC	Ion-electron chromatography
Ile	Isoleucine
IR	Infrared radiation
KOH	Potassium hydroxide
L-AA	L-ascorbic acid
LC	Liquid chromatography
Leu	Leucine
LIF	Laser-induced fluorescence
LLE	Liquid-liquid extraction
LOQ	Limit of quantification
LOD	Limit of detection
Lys	Lysine
MAE	Microwave-assisted extraction
m.c.	Moisture content
MCE	Microchip electrophoresis
MD-μ-SPE	Dispersive micro-solid phase extraction
MEKC	Micellar electro kinetic chromatography
Met	Methionine
MIC	Microwave induced-combustion
MPA	Metaphosphoric acid
MRM	Multiple reaction monitoring
MS	Mass spectrometry
MS/MS	Tandem mass spectrometry
MSPE	Magnetic solid phase extraction
MTBE	Methyl tertiary-butyl ether
MTBSTFA	N-methyl-N-(tert-butyldimethylsilyl trifluoroacetamide
MUFA	Monounsaturated fatty acids
MW	Microwave heating
MW-AD	Microwave assisted-digestion
NAA	Neutron activation analysis
Nano-LC	Nano-liquid chromatography
NARP	Non-aqueous reversed-phase
NBD-Cl	4-chloro-7-nitro-2,1,3-benzoxadiazole
NEAA	Non-essential amino acid
NIR	Near infrared reflectance
NMR	Nuclear magnetic resonance
NP	Normal phase
OPA	O-phthaldialdehyde
Orn	Ornithine
PAA-T	Tetracycline-grafted polyacrylamide polymer
PCA	Perchloric acid
PDA	Photo-diode array
Phe	Phenylalanine
PITC	Phenylisothiocyanate
PLE	Pressurized liquid extraction
Pro	Proline
PUFA	Polyunsaturated fatty acids
QC	Quality control
QTOF-MS	Quadrupole time-of-flight mass spectrometry
RID	Refractive index detector
RITDF	Rapid integrated total dietary fiber
RP	Reversed-phase
SEC	Size-exclusion chromatography
Ser	Serine
SFA	Saturated fatty acids
SFC	Supercritical fluid chromatography
SNR	Signal-to-noise ratio
SPE	Solid phase extraction
SWASV	Square wave anodic stripping voltammetry
SWAdSV	Square wave adsorptive stripping voltammetry
TCA	Trichloroacetic acid
TDF	Total dietary fiber
THGA	Transverse heated graphite tube
Thr	Threonine
TMS-DM	Trimethylsilyl-diazomethane
Trp	Tryptophan
Tyr	Tyrosine
U	Expanded uncertainty
UAE	Ultrasound assisted extraction
UHPLC	Ultra-high-performance liquid chromatography
UPC2	Ultra-performance convergence chromatography
UV/Vis	Ultraviolet/visible
Val	Valine
VUV	Vacuum ultraviolet
WSV	Water soluble vitamin