AD	Alzheimer’s disease
ANOVA	Analysis of variation
CID	Collision induced dissociation
CV	Coefficient of variation
DESI	Desorption electrospray ionization
DI-FT-ICR-MS	Direct injection FT-ICR-MS
DOM	Dissolved organic matter
ESI	Electrospray ionization
FF	Fresh frozen
FFPE	Formalin-fixed, paraffin-embedded
FID	Free induction decay
FIE	Flow injection electrospray
FT-ICR-MS	Fourier transform ion cyclotron resonance mass spectrometry
H/C	Hydrogen to carbon ratio
HMDB	Human metabolome database
HPLC	High performance liquid chromatography
HRMS	High resolution mass spectrometry
ICR	Ion cyclotron resonance
IFS	Isotopic fine structure
KMD	Kendrick mass defect
LC-MS	Liquid chromatography mass spectrometry
LPC	Lysophosphatidyl choline
MALDI	Matrix assisted laser desorption ionization
MS	Mass spectrometry
NMR	Nuclear magnetic resonance
NSO:C	Ratio of heteroatoms to carbon
O/C	Oxygen to carbon ratio
OPLS-DA	Orthogonal projections to latent structures discriminant analysis
PDS	Sodium persulfate
ppb	Parts per billion
QToF	Quadrupole time-of-flight
RCE	Rhodiola crenulate
RT	Retention time
SOM	Soil organic matter
T	Tesla
T2D	Type 2 diabetes
UK	United Kingdom
WAF	Water accommodated fraction
WSF	Water soluble fraction