In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: A device used in this technique consists of an RF ring electrode and two other hyperbolic electrodes, and is sometimes named for Wolfgang Paul. A collision cell is used in the QqQ form of this technique. Sinapinic acid and DHB are common reagents for it. This technique occurs in series, or in "tandem", in order to sequence proteins. Tropylium cations form in this technique from benzyl compounds. Frequently, this process is combined with liquid or gas chromatography. The output of this process has a peak labelled M+1, originating from isotopes in the molecular ion, while the most common fragment is called the base peak. High-energy electrons cause fragmentation during its first step. For 10 points, name this technique which measures the ratio of a namesake property to charge.
A:
Science