Measurement of onset potentials for proton transfer reactions with a triple quadrupole instrument

✍ Scribed by Maurice M. Bursey; Thomas R. Blackburn; William J. Meyerhoffer; William A. Mattson

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 386 KB
• Volume: 25
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210250410

✦ Synopsis

Problems with the treatment of data from the study of both exothermic and endothermic ion-molecule reactions are discussed. Recommendations are (i) to extrapolate data from an obviously linear region in the plot of ratios of secondary to primary ion intensity which appears -1-3 V above the value of the onset potential; (ii) to use ionization methods that give low internal energies to primary ions; (iii) to set for moderately high resolution; (iv) to check the stability of the primary ion current frequently; (v) to pay special attention heed to source and collision region pressure stability; and (vi) to keep collision region pressures below 0.6 mPa.