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Complexometric titration (sometimes chelatometry) is a form of volumetric analysis in which the formation of a colored complex is used to indicate the end point of a titration. Complexometric titrations are particularly useful for the determination of a mixture of different metal ions in solution. An indicator capable of producing an unambiguous color change is usually used to detect the end-point of the titration. ==Reactions for Complexometric Titration== In theory, any complexation reaction can be used as a volumetric technique provided that: #the reaction reaches equilibrium rapidly after each portion of titrant is added. #interfering situations do not arise. For instance, the stepwise formation of several different complexes of the metal ion with the titrant, resulting in the presence of more than one complex in solution during the titration process. #a complexometric indicator capable of locating equivalence point with fair accuracy is available. In practice, the use of EDTA as a titrant is well established. 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「Complexometric titration」の詳細全文を読む スポンサード リンク
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