空气中氟的测定对环境保护具有重要意义。利用铈(或镧)-茜素络合剂光度法测定氟,是目前常采用的方法,本法虽然具有准确可靠等优点,但即使试样中含有少量Fe(Ⅲ),Al(Ⅲ),Cu(Ⅱ)等离子还需采用蒸馏或萃取等方法分离干扰。为此,我们在前人工作的基础上,经多次试验证明用 Determination of fluorine in the air is of great significance for environmental protection. The method of spectrophotometric determination of fluorine by cerium (or lanthanum) - alizarin complexing agent is a commonly used method. Although this method has the advantages of accuracy and reliability, even though the sample contains a small amount of Fe (Ⅲ), Al (Ⅲ) Cu (Ⅱ) plasma also need to use distillation or extraction methods such as separation of interference. For this reason, on the basis of our predecessors’ work, we have proved by many experiments