ACCESSION: MSBNK-MSSJ-MSJ00758
RECORD_TITLE: alpha-Ketoglutaric acid; GC-EI-QQ; MS2; positive; CID 10 V; MEOX,2TBDMS-derivative; [M-247]+
DATE: 2021.10.06
AUTHORS: Nobuyuki Okahashi and Fumio Matsuda, Osaka University
LICENSE: CC BY
COPYRIGHT: Nobuyuki Okahashi and Fumio Matsuda, Osaka University
PUBLICATION: Nobuyuki Okahashi et al. Mass Spectrometry 2019 vol. 8, A0073.
COMMENT: Annotation of fragment ions (PK$ANNOTATION) is based on Table 1 and Supplemental material page 24 of the publication.
COMMENT: This record was created by the financial support of MEXT/JSPS KAKENHI Grant Number 21HP8020 to the Mass Spectrometry Society of Japan.

CH$NAME: alpha-Ketoglutaric acid
CH$COMPOUND_CLASS: Natural Product; glutaric acid
CH$FORMULA: C₅H₆O₅
CH$EXACT_MASS: 146.02153
CH$SMILES: OC(=O)C(=O)CCC(=O)O
CH$IUPAC: InChI=1S/C5H6O5/c6-3(5(9)10)1-2-4(7)8/h1-2H2,(H,7,8)(H,9,10)
CH$LINK: CAS 328-50-7
CH$LINK: CHEBI 30915
CH$LINK: CHEMSPIDER 50
CH$LINK: INCHIKEY KPGXRSRHYNQIFN-UHFFFAOYSA-N
CH$LINK: PUBCHEM CID:51

AC$INSTRUMENT: GCMS-QP2010 Ultra (Shimadzu, Kyoto, Japan)
AC$INSTRUMENT_TYPE: GC-EI-QQ
AC$MASS_SPECTROMETRY: MS_TYPE MS2
AC$MASS_SPECTROMETRY: ION_MODE POSITIVE
AC$MASS_SPECTROMETRY: COLLISION_ENERGY 10 V
AC$MASS_SPECTROMETRY: COLLISION_GAS Ar (200 kPa)
AC$MASS_SPECTROMETRY: FRAGMENTATION_MODE CID
AC$MASS_SPECTROMETRY: HELIUM_FLOW 1 ml/min
AC$MASS_SPECTROMETRY: ION_SOURCE_TEMPERATURE 200 C
AC$MASS_SPECTROMETRY: SCAN_RANGE_M/Z 50-600
AC$CHROMATOGRAPHY: COLUMN_NAME DB-5MS+DG (Agilent Technologies, Santa Clara, CA, USA)
AC$CHROMATOGRAPHY: INJECTION_TEMPERATURE 250 C
AC$CHROMATOGRAPHY: OVEN_TEMPERATURE 70 C (Duration 2 min)-280 C (rate:10 C/min; Duration 3 min)
AC$CHROMATOGRAPHY: TRANSFARLINE_TEMPERATURE 250 C

MS$FOCUSED_ION: DERIVATIVE_FORM C18H37NO5Si2
MS$FOCUSED_ION: DERIVATIVE_MASS 403.22102
MS$FOCUSED_ION: DERIVATIVE_TYPE MEOX, 2TBDMS
MS$FOCUSED_ION: PRECURSOR_M/Z 156.04753

PK$SPLASH: splash10-056r-9500000000-7669834084484eb372a8
PK$ANNOTATION: m/z formula exact_mass error(ppm)
  156.05 C6H10NO2Si+ 156.04753 15.8
PK$NUM_PEAK: 6
PK$PEAK: m/z int. rel.int.
  55 279359 343
  75.05 812270 999
  85.1 17356 21
  110.1 16178 19
  112.1 153082 188
  156.05 466382 573
//