spectrometry (ToF-SIMS) spectra were notably stronger than the background signals. Similarly, a series of five organic amines with diverse
structures were directly analyzed by positive ion ToF-SIMS. In all but one of the spectra characteristic, and sometimes even quasi-molecular ions,
were observed. Most likely, the good halide ion yields are largely a function of the electronegativity of the halogens. We also propose that direct
analysis of amines on normal phase silica gel is facilitated by the acidity, i.e., proton donation, of surface silanol groups.
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