Raju NP, Mirza SP, Vairamani M, Ramulu AR, Pardhasaradhi M. 5-Ethyl-2-mercaptothiazole as matrix for matrix-assisted laser desorption/ionization of a broad spectrum of analytes in positive and negative ion mode.
Rapid Commun Mass Spectrom 2001;
15:1879-1884. [PMID:
11565107 DOI:
10.1002/rcm.392]
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Abstract
A preliminary investigation of the use of 5-ethyl-2-mercaptothiazole as matrix in matrix-assisted laser desorption/ionization (MALDI) of a broad spectrum of analytes is reported. The analytes studied are substance P, insulin, beta-cyclodextrin, triacylglycerols of coconut oil and polypropylene glycol 2000 (PPG 2000). In the positive ion mass spectra of the matrix/analyte combinations, the formation of [M + H]+ and [M + cation]+ species were observed and compared with those obtained by using well-established matrices such as alpha-cyano-4-hydroxycinnamic acid, genticic acid, sinapinic acid and dithranol. In addition, the usefulness of this new matrix for MALDI in negative ion mode is also described using substance P and beta-cyclodextrin as examples.
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