TY - JOUR
T1 - Gas chromatography-mass spectrometry methods for the analysis of mycocerosic acids present in Mycobacterium tuberculosis
AU - Alugupalli, Srinivas
AU - Sikka, Monica K.
AU - Larsson, Lennart
AU - White, David C.
N1 - Copyright:
Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 1998/1
Y1 - 1998/1
N2 - Mycocerosic acids of Mycobacterium tuberculosis were studied by gas chromatography-mass spectrometry. Mycobacterial cells were subjected to alkaline hydrolysis and then acidified before being extracted using petroleum ether to collect the acids. Methyl ester, trimethylsilyl and pentafluorobenzyl derivatives of the mycocerosic acids were formed. In the electron impact mode, using selected-ion monitoring, the methyl ester derivative of 2,4,6,8-tetramethyloctacosanoic acid (C32 mycocerosic acid) was detectable down to 20 pg (injected amount), whereas in the negative-ion chemical ionization mode, the pentafluorobenzyl derivative was detectable down to 2 pg, provided that the temperature of the ion source was at least 240°C. The described methods can be used to demonstrate and quantify certain species of Mycobacterium, including M. tuberculosis, in clinical or environmental samples. Copyright (C) 1998 Elsevier Science B.V.
AB - Mycocerosic acids of Mycobacterium tuberculosis were studied by gas chromatography-mass spectrometry. Mycobacterial cells were subjected to alkaline hydrolysis and then acidified before being extracted using petroleum ether to collect the acids. Methyl ester, trimethylsilyl and pentafluorobenzyl derivatives of the mycocerosic acids were formed. In the electron impact mode, using selected-ion monitoring, the methyl ester derivative of 2,4,6,8-tetramethyloctacosanoic acid (C32 mycocerosic acid) was detectable down to 20 pg (injected amount), whereas in the negative-ion chemical ionization mode, the pentafluorobenzyl derivative was detectable down to 2 pg, provided that the temperature of the ion source was at least 240°C. The described methods can be used to demonstrate and quantify certain species of Mycobacterium, including M. tuberculosis, in clinical or environmental samples. Copyright (C) 1998 Elsevier Science B.V.
KW - Derivative
KW - M. tuberculosis
KW - Mass spectrometry
KW - Mycocerosic acids
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U2 - 10.1016/S0167-7012(97)00100-0
DO - 10.1016/S0167-7012(97)00100-0
M3 - Article
AN - SCOPUS:0031950781
SN - 0167-7012
VL - 31
SP - 143
EP - 150
JO - Journal of Microbiological Methods
JF - Journal of Microbiological Methods
IS - 3
ER -