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Citric acid, 2-methyl- (4TMS) BP

 

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Replica Mass Spectra of Citric acid, 2-methyl- (4TMS) BP

replica	lib entry date	detection	method	species
1	12 October 2005	MS-TRAP	M[BAR]
2	19 July 2007	MS-TOF	VAR5	Reference Substance
3	05 December 2003	MS-Quad	M[2]	Standard
4	01 February 2005	MS-TOF	M[6]	Reference Substance
5	01 August 2002	MS-Quad	M[2]	Lotus japonicus (Regel) K. Larsen
6	19 July 2007	MS-TOF	MDN35	Reference Substance
7	01 February 2005	MS-TOF	M[6]	Reference Substance
7 spectrum(a)

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Spectrum Details

analyte	Citric acid, 2-methyl- (4TMS) BP
analyte InChI	InChI=1S/C19H42O7Si4/c1-15(17(21)24-28(5,6)7)19(26-30(11,12)13,18(22)25-29(8,9)10)14-16(20)23-27(2,3)4/h15H,14H2,1-13H3/t15-,19+/m0/s1
analyte mass	494.87
chromatogram	2233BG08
citation	Schauer N, Steinhauser D, Strelkov S, Schomburg D, Allison G, Moritz T, Lundgren K, Roessner-Tunali U, Forbes MG, Willmitzer L, Fernie AR, Kopka J (2005) FEBS Letters 579, 1332-1337
authors	Kopka 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 date	01 August 2002
metabolite role	METB
retention time (sec)	1,601.7
retention index (VAR5 method, n-alkanes C10–C36)	1,823.46 (predicted, according to Strehmel, N. et.al)
base peak (m/z)	73
maximal intensity	999
mass-intensity-peaks cardinality	172 intensities
minimal m/z	43
maximal m/z	481
download JCAMP DX	SpectrumJcampDx.ashx?id=2d412da4-6323-48a0-978b-d152fe4ab61b
download MSP	SpectrumMsp.ashx?id=2d412da4-6323-48a0-978b-d152fe4ab61b

GC-Method

name	M[2]
citation	Roessner U, Wagner C, Kopka J, Trethewey RN, Willmitzer L (2000) Plant J 23, 131-142

attribute	text	details
deconvolution	AMDIS, National Institute of Standards and Technology, Gaithersburg, MD, USA	DIRECTION:Low to High; WIDTH: 20; SUBTRACTION: two; RESOLUTION: low; SENSITIVITY: low; SHAPE: low
derivatization	MEOX; TMS	Methoxyamination:60min37°C; Trimethylsilylation:>45min37°C
detector	MS-Quad	m/z = 35-600; scans:2/s; MD 800 Thermo-Finnigan, San Jose, CA, USA
extraction	methanol:water (4:1; v/v); 15min70°C
ion source	EI	70eV
metabolic inactivation	cut; liquid nitrogen; -80°C
partitioning	methanol fraction of a methanol:water:chloroform (approx. 2:2:1, v/v/v) partitioning
RI	ALKANE	C12, C15, C19, C22, C28, C32, C36
separation	GC	COLUMN:5%diphenyl-95%dimethylpolysiloxane (arylene), 30+10m, ID:0.25mm, DF:0.25microm, Rtx-5SilMS Integra-Guard, #NA (Restek, Bad Homburg, Germany); PROGRAM:iso1min70°C, ramp9°C/min, iso5min350°C; FLOW:Helium, 0.6ml/min; INJECTION:1microL, splitless, 230°C; TRANSFER:250°C; IONSOURCE:250°C

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