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Alanine, beta- (2TMS)

 

Replica Mass Spectra of Alanine, beta- (2TMS)

replicalib entry datedetectionmethodspecies
112 May 2005  M[NIST] 
215 March 2005 MS-TOFM[6]Reference Substance
407 September 2004 MS-QuadM[2]Brassica napus
512 May 2005  M[NIST] 
1505 June 2013  MRI_2013 
1203 November 2010  Schomburg_GC_2010 
1305 April 2011 MS-TOFVAR5 
722 February 2005 MS-TOFM[STR] 
819 July 2007 MS-TOFVAR5Reference Substance
925 January 2005 MS-TOFM[MOR] 
12 spectrum(a)
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Spectrum Details

analyteAlanine, beta- (2TMS)
analyte InChIInChI=1S/C9H23NO2Si2/c1-13(2,3)10-8-7-9(11)12-14(4,5)6/h10H,7-8H2,1-6H3
analyte mass233.46
chromatogram11053gf_14
citationNA
authorsKopka J, Max Planck Institute of Molecular Plant Physiology, Department of Molecular Plant Physiology (Prof. Willmitzer L), Am Muehlenberg 1, D-14476 Golm, Germany
lib entry date06 April 2011
metabolite role 
retention time (sec)549.98
retention index (VAR5 method, n-alkanes C10–C36)1,184.43 (observed)
base peak (m/z)73
maximal intensity102,156
mass-intensity-peaks cardinality353 intensities
minimal m/z70
maximal m/z599
download JCAMP DXSpectrumJcampDx.ashx?id=5f8c518d-4eaf-4dad-855b-846e5fe41285
download MSPSpectrumMsp.ashx?id=5f8c518d-4eaf-4dad-855b-846e5fe41285

GC-Method

nameVAR5
citationKopka J, Max Planck Institute of Molecular Plant Physiology, Department of Molecular Plant Physiology (Prof. Willmitzer L), Am Muehlenberg 1, D-14476 Golm, Germany
attributetextdetails
deconvolutionChromaTOFOFFSET: "just above noise"; SMOOTHING: 20; PEAK WIDTH: 6; S/N: 2
derivatizationMEOX; TMSMETHOXYAMINATION: 90min at 30°C; TRIMETHYLSILYLATION: 30min at 37°C
detectorMS-TOFm/z = 70-600; scans:20/s; Pegasus III TOF mass spectrometer
extractionwater:chloroform (2:1; v/v) 15min at 70°C
gas chromatographAgilent GC 6890 
ion sourceEI70eV
mass spectrometry instrumentPegasus III TOF mass spectrometer 
metabolic inactivationshock-frozen in liquid nitrogen 
RIALKANEC10, C12, C15, C18, C19, C22, C28, C32, C36
separationGCCOLUMN:5%phenyl-95%dimethylpolysiloxane, 30+10m, ID:0.25mm, DF:0.25µm, 5PDM VF-5ms (Varian, Darmstadt, Germany); PROGRAM:iso1min 70°C, ramp 9°C/min, iso 5min 350°C; FLOW:Helium, 0.6mL/min; INJECTION:1µL, splitless, 230°C; TRANSFER:250°C; IONSOURCE:250°C
protocolpropertyvalue
extractionwater chloroform(2:1; v/v) 15min at 70°C
derivatizationderivatisationMETHOXYAMINATION, 90min at 30°C
derivatizationderivatisationTRIMETHYLSILYLATION, 30min at 37°C
separationIon source temperature250°C
separationColumn length30+10m (analytical column + guard column)
separationColumn inner diameter0.25mm
separationTemperature programisotherm 1min 70°C, ramp 9°C/min, isotherm 5min 350°C
ion sourceelectron ionization70eV
detectorLECO instrument modelPegasus III TOF mass spectrometer
detectorhighest observed m/zm/z = 600
detectorlowest observed m/zm/z = 70
detectorsampling frequency20 scans/s
detectormass analyzer typeMS-TOF
deconvolutionmoving average smoothing20
deconvolutionsoftwareChromaTOF
deconvolutionsignal-to-noise ratio2
RIRetention indexdecane
RIRetention indexdodecane
RIRetention indexpentadecane
RIRetention indexoctadecane
RIRetention indexnonadecane
RIRetention indexdocosane
RIRetention indexoctacosane
RIRetention indexdotriacontane
RIRetention indexhexatriacontane
ChromatographyChromatographyAgilent GC 6890

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