PROBLEM TO BE SOLVED: To provide equipment for a pretreatment which is convenient and performs a pretreatment enabling precise determination of a calcium ion concentration with a calcium ion electrode.SOLUTION: Equipment for a pretreatment 1 is that for pretreating a sample solution containing a calcium ion prior to determination of a calcium ion concentration with a calcium ion electrode. The equipment for a pretreatment 1 comprises: an acid addition device 3 to add an acid to the sample solution and a base addition device 4 to add a base to the sample solution to which the acid has been added.COPYRIGHT: (C)2014,JPO&INPIT【課題】簡便な前処理装置で、カルシウムイオン電極を用いてカルシウムイオン濃度を正確に測定できる前処理装置を提供する。【解決手段】カルシウム化合物が含まれる試料溶液中のカルシウムイオン濃度をカルシウムイオン電極によって測定する前に前処理を施すための前処理装置1であって、前記試料溶液に酸を添加する酸添加機構3と、酸を添加した前記試料溶液に塩基を添加する塩基添加機構4と、を備える前処理装置1。【選択図】図1
