论文部分内容阅读
镀铬车间生产中,要求经常测定 Cr~(+3)和 Fe~(+3)的含量。尤其是 Cr~(+3)含量,对要求较严格的松孔镀铬来讲,更需随时调整才能保证产品质量。现在一般采用差减法或沉淀分离——氧化还原法测定。前者虽快速但准确度差,后者较准确,但烦复费时。为了解决这个问题,我们试用阳离子交换树脂,使 Cr~(+3)、Fe~(+3)和大量六价铬(呈铬酸根络阴离子状态)分离,然后用适当浓度的酸溶液,将 Cr~(+3)、Fe~(+3)从树脂上洗脱下来分别测
In the production of chrome plating workshop, the content of Cr ~ (+3) and Fe ~ (+3) is often measured. Especially Cr ~ (+3) content, for the more stringent requirements of loose hole chrome plating, but also need to be adjusted at any time to ensure product quality. Now commonly used subtractive subtraction or precipitation separation - redox method. Although the former is fast but the accuracy is poor, the latter is more accurate, but troublesome and time-consuming. In order to solve this problem, we try to use cation exchange resin to separate Cr ~ (+3), Fe ~ (+3) and a large amount of hexavalent chromium (as chromate complex anion), and then use the appropriate concentration of acid solution, Cr ~ (+3), Fe ~ (+3) elution from the resin were measured separately