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
Negative and positive rights third party, would be to violate that person's negative rights. Other advocates of the view that there is a distinction between negative and positive rights argue that the presence of a police force or army is not due to any positive right to these services that citizens claim, but rather because they are natural monopolies or public goods—features of any human society that arise naturally, even while adhering to the concept of negative rights only. Robert Nozick discusses this idea at length in his book "Anarchy, State, and Utopia". In the field of medicine, positive rights of patients often conflict