Abbreviation Definition thymine Ac，OAc acetyl，A，C，G，T adenine，cytidine，guanine，acetate ADP，AMP，ATP adenosine 5′-di-，-mono-，-triphosphate，etc. and similar nucleoside phosphates AR analytical grade bp base pair Standard 3- and 1-letter codes amino acids AU absorbance units BET Brunauer-Emmett-Teller CE，CEC capillary electrophoresis，capillary electrochromatography d，m，p，r，t in nucleosides／deoxy，messenger，phosphate，recombinant／ribosomal，transfer nucleotides／nucleic acids DEAE diethylaminoethyl DNA，DNase deoxyribonucleic acid，deoxyribonuclease EDTA ethylene diamine tetraacetic acid FID flame ionization detector FLD fluorescence detector FT Fourier transform GC gas chromatography HP… high performance…IC ion chromatography i.d. internal diameter IgG immunoglobulin G IR infrared IS internal standard LC liquid chromatography LOD limit of detection LOQ limit of quantification MALDI-TOF matrix-assisted laser desorption ionization-time of flight Mr relative molecular mass MRM multiple reaction monitoring MS，MS／MS mass spectrometry，tandem mass spectrometry NAD，NADH （NADP，NADPH） nicotinamide-adenine dinucleotide （phosphate）NMR nuclear magnetic resonance PCR polymerase chain reaction QuEChERS quick，easy，cheap，effective，rugged and safe r correlation coefficient RNA，RNase ribonucleic acid，ribonuclease RP… reversed-phase …RSD relative standard deviation （preferred over coefficient of variation）SD standard deviation SIM selected ion monitoring S／N signal／noise SPE，SPME solid phase extraction，solid phase microextraction SRM selected reaction monitoring TLC thin-layer chromatography Tris tris（hydroxymethyl）aminomethane UV ultraviolet Vis visible