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- E-ISSN 2288-8985
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The Study of Generation of Adduct and Fragment Ions by LC/TSP/MS
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1996, v.9 no.1, pp.1-12
Kim,
Y.
(1996). The Study of Generation of Adduct and Fragment Ions by LC/TSP/MS. Analytical Science and Technology, 9(1), 1-12.
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Abstract
The thermally labile compounds with hydroxyl group generate the [<TEX>${MNH_4}^+$</TEX>] ion, [<TEX>$MH^+$</TEX>] and [<TEX>$MH^+-OH$</TEX>] ion by ion-molecule reaction in LC/TSP/MS. But these ions create the trouble in the estimation of molecular weight of an unknown compound because the margin of [<TEX>${MNH_4}^+$</TEX>] ion and [<TEX>$MH^+$</TEX>] ion is same to that of [<TEX>$MH^+$</TEX>] ion and [<TEX>$MH^+-OH$</TEX>] ion. If it is compensated for the results by using of the <TEX>$CF_3COOD+NH_4OH$</TEX> LC eluent, the molecular weight of analyte will be able to be confirmed. And this study was tried to recognize whether the fragment ions of thermally labile compound are generated by electron impact or by thermal degradation in ion source.
- keywords
- corticosteroids, thermally labile compounds, <TEX>$CF_3COOD+NH_4OH$</TEX> and <TEX>$CF_3COOD+NH_4OH$</TEX> LC eluent, filament ON and OFF mode, LC/TSP/MS
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