论文部分内容阅读
本文确定乳酸不失为酸性溶液中一良好隐蔽剂,在pH5—6间,能隐蔽大量钛(Ⅳ)。在pH 5.3,10毫升1:4乳酸能隐蔽70毫克的钛,使滴定不为乳酸隐蔽的离子如铁、锆、铝、铅等不受钛的干扰。乳酸能嚣换络合钛(Ⅳ)的EDTA,使在不为乳酸隐蔽的十种元素存在下(铁、锆、铝、铋、锌、镉、铅、铜、钴和镍)能选择滴定钛,可能用于测定钛铁矿、钛合金与钛化合物等快速而又准确测定钛的新方法。在pH2.5间将钛(Ⅳ)-EDTA络合物煮沸一刻钟以上,能使钛(Ⅳ)与EDTA络合完全,继调至pH5—6后钛不水解,而能定量滴定,此点已用于以乳酸置换法准确间接滴定钛。
This article confirms that lactate is a good concealment agent in acidic solution, and can hide a large amount of titanium (Ⅳ) between pH5-6. At pH 5.3, 10 ml of 1: 4 lactic acid conceals 70 mg of titanium, making titration non-lactic acid concealed ions such as iron, zirconium, aluminum, lead, etc. free from titanium interference. Lactic acid can exchange EDTA for the titanium (IV) complex so that titanium (Titanium) can be selected in the presence of ten elements that are not concealed by lactic acid (iron, zirconium, aluminum, bismuth, zinc, cadmium, lead, , May be used for the determination of ilmenite, titanium and titanium compounds such as rapid and accurate determination of titanium new method. The titanium (IV) -EDTA complex boiled for more than a quarter of an hour at a pH of 2.5 can make titanium (IV) fully complex with EDTA. Titanium (IV) can be titrated quantitatively after adjusting to pH5-6 Titanium has been used to titrate lactate accurately and indirectly.