Ammonia in the ion source. 1–Negative ion chemical ionization of phenols1
✍ Scribed by Geoffrey B. Anderson; Richard G. Gillis; R. B. Johns; Quentin N. Porter; Michael G. Strachan
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- English
- Weight
- 127 KB
- Volume
- 19
- Category
- Article
- ISSN
- 1076-5174
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Under ammonia chemical ionization (CI) conditions triarylpropenones undergo hydrogen radical-induced olefinic bond reduction on metal surfaces, resulting in [M + 2H + NHJ' ions corresponding to the ammonium adduct of the saturated ketone. The decomposition of the adduct ions, (MNH,]' and (M + 2H + N
## Abstract The best operating conditions that yield maximum sensitivity at minimum source pressure have been evaluated for the chemical ionization source in a Kratos MS‐25 mass spectrometer. The best reagent gas pressure is shown to be different for each gas and is significantly lower than is usua