Detection method of total iron content

The invention relates to a method for detecting the total iron content in an iron-containing sample, which comprises the following steps: (1) digesting m g of sample, and then adding a hydrochloric acid solution to obtain a solution to be detected; (2) dropwise adding a stannous chloride solution into the to-be-detected solution, and stopping dropwise adding until the to-be-detected solution becomes white; (3) carrying out titration by using a potentiometric titrator, selecting dynamic potentiometric titration as a titration mode, and selecting potassium dichromate with the concentration of c as a titrant; (4) recording volumes V1 and V2 corresponding to potential curve jump points, wherein the calculation formula of the total iron content is # imgabs0 # 本发明涉及一种含铁样品中总铁含量的检测方法，包括以下步骤：(1)将m g样品消解，然后加入盐酸溶液，得到待测液；(2)往待测液中滴加氯化亚锡溶液，至待测液变成白色时停止滴加；(3)用电位滴定仪进行滴定，滴定模式选择动态电位滴定，滴定剂选择浓度为c的重铬酸钾；(4)记录电位曲线突跃点对应的体积为V1和V2，总铁含量的计算公式为：#imgabs0#