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Titration, also known as titrimetry,〔 〕 is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of an identified analyte. Since volume measurements play a key role in titration, it is also known as volumetric analysis. A reagent, called the ''titrant'' or ''titrator''〔 〕 is prepared as a standard solution. A known concentration and volume of titrant reacts with a solution of ''analyte'' or ''titrand''〔 〕 to determine concentration. The volume of titrant reacted is called ''titration volume''. ==History and etymology== The word "titration" comes from the Latin word ''titulus'', meaning inscription or title. The French word ''titre'', also from this origin, means rank. Volumetric analysis originated in late 18th-century France. François-Antoine-Henri Descroizilles (fr) developed the first burette (which was similar to a graduated cylinder) in 1791.〔 〕 Joseph Louis Gay-Lussac developed an improved version of the burette that included a side arm, and coined the terms "pipette" and "burette" in an 1824 paper on the standardization of indigo solutions. A major breakthrough in the methodology and popularization of volumetric analysis was due to Karl Friedrich Mohr, who redesigned the burette by placing a clamp and a tip at the bottom, and wrote the first textbook on the topic, ''Lehrbuch der chemisch-analytischen Titrirmethode'' (''Textbook of analytical-chemical titration methods''), published in 1855.〔 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Titration」の詳細全文を読む スポンサード リンク
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