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 is "mistaken". He says that the question between what one has a right to do and who if anybody enforces it are separate issues. If rights are only negative then it simply means no one has a duty to enforce them, although individuals have a right to use any non-forcible means to gain the cooperation of others in protecting those rights. Therefore, he says "the distinction between negative and positive is quite robust." Libertarians hold that positive rights, which would include a right to be protected, do not exist until they are created by contract. However, those who hold this