Gas chromatography-mass spectrometry methods for the analysis of mycocerosic acids present in Mycobacterium tuberculosis

Srinivas Alugupalli, Monica Sikka, Lennart Larsson, David C. White

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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 (C 32 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.

Original languageEnglish (US)
Pages (from-to)143-150
Number of pages8
JournalJournal of Microbiological Methods
Volume31
Issue number3
DOIs
StatePublished - Jan 1 1998
Externally publishedYes

Fingerprint

Mycobacterium tuberculosis
Gas Chromatography-Mass Spectrometry
Ions
Esters
Mycobacterium
Hydrolysis
Electrons
Temperature
Acids
mycocerosic acid

Keywords

  • Derivative
  • M. tuberculosis
  • Mass spectrometry
  • Mycocerosic acids

ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology
  • Microbiology (medical)

Cite this

Gas chromatography-mass spectrometry methods for the analysis of mycocerosic acids present in Mycobacterium tuberculosis. / Alugupalli, Srinivas; Sikka, Monica; Larsson, Lennart; White, David C.

In: Journal of Microbiological Methods, Vol. 31, No. 3, 01.01.1998, p. 143-150.

Research output: Contribution to journalArticle

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