铝合金表面处理剂中含有HF、H(?)PO_4,锫盐、铝盐、钛盐、硼化合物、硝酸盐、铵盐及少量有机酸。用EDTA络合滴定法测定锆或铝,由于氟化物和磷酸、钛盐等的干扰,难于得到准确结果。我们用硫酸除氟后,用碱溶液将Al~(3+)与Zrs~(3+)分离,再分别测定锆、铝,很方便的消除了HF、钛盐及磷酸的干扰。现简介如下。 Aluminum alloy surface treatment agent contains HF, H (?) PO_4, 锫 salt, aluminum salt, titanium salt, boron compounds, nitrate, ammonium salt and a small amount of organic acids. Determination of zirconium or aluminum with EDTA complexometric titration, due to the interference of fluoride and phosphoric acid, titanium salts, etc., difficult to get accurate results. After we remove the fluoride with sulfuric acid, Al ~ (3 +) and Zrs ~ (3 +) are separated by alkaline solution, and then the determination of zirconium and aluminum respectively, it is convenient to eliminate the interference of HF, titanium salt and phosphoric acid. Now the introduction is as follows.