经典的重铬酸钾测铁法,由于使用汞盐及铬盐,严重污染环境,近年来在国内为改变测铁方法减少环境污染,成为研究重点之一,也提出了不少取代的方法,一般以改变不用汞盐为多,如北京矿冶研究院的氯化亚锡——甲基橙——重铬酸钾法,昆明冶金研究所的考克西林——三氯化钛——重铬酸钾法,勘探公司的三氯化钛——钨酸钠重铬酸钾法等,其他省也提 The classic potassium dichromate method, due to the use of mercury salts and chromium salts, seriously pollutes the environment. In recent years, it has become one of the focuses of research to change the iron measurement method to reduce environmental pollution. Many alternative methods have also been proposed. Generally change the mercury salt is not more, such as the Beijing Institute of Mining and Metallurgy Stannous chloride - methyl orange - potassium dichromate method, Kunming Institute of Metallurgical Coxillin - titanium trichloride - heavy Potassium chromate method, exploration company of titanium trichloride - sodium tungstate potassium dichromate method, other provinces also mention