Chemical ionization source, the reagent gas is present in large excess compared to the analyte. Electrons entering the source with energy around 200-500 eV will preferentially ionize the reagent gas. Then, the ion/molecule reactions produces more stable reagent ions and the resultant collisions with other reagent gas molecules will create an ionization plasma. Positive and negative ions of the analyte are formed by reactions with this plasma. The following reactions are possible with methane as the reagent gas. If ammonia is the reagent gas, For isobutane as the reagent gas, Self chemical ionization is possible if the reagent ion is an ionized
Positive Songs for Negative People eclectic musicianship combined with uplifting and introspective lyrics, calling it "an invigorating, infectious set that reaffirms Turner's faith in music's power to motivate and heal." Alexis Petridis of "The Guardian" found some of the material weary with its earnestness and rousing bombast, but said that they were outweighed with more melancholic tracks like "Silent Key" and "Song for Josh", concluding that, "For all its flaws, "Positive Songs for Negative People" feels like the work of someone who knows exactly what he’s doing." Ryan Reed of "Paste" noted that the songs throughout were marred by a mixture of embarrassing lyrics with