β Scribed by Clement W. Kazakoff; Peter H. Bird; Robin T. B. Rye
No coin nor oath required. For personal study only.
Dear Sir Production of X-rays in a Fast-Atom Bombardment Source A number of reports have suggested that reduction processes observed in fastatom bombardment spectra m a y originate, at least in part, from interaction of analyte or matrix with ionizing radiation. Wirth and co-workers* proposed that short-wavelength radiation was involved in the reduction of peptides containing a azo group. Burinsky et a1.' have recently discussed the reduction of methylene blue during ionization by a variety of methods. These authors note that methylene blue is photoactive, and that sources of light a r e present in many m a s s spectrometric ion sources. We wish to report the results of recent experiments in which the possible involvement of x-rays in the reduction of methylene blue in glycerol was investigated, Yours
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## Abstract The nature of the matrix used in Fast Atom Bombardment (FAB) mass spectrometry analyses of pyrazolo[1,2β__a__]pyrazoles was found to influence significantly their positive and negative ions mass spectra. Indeed the use of glycerol provided an abundant ion corresponding to the protonated