我们根据苏联和刚提出的特里隆(即 EDTA)滴定法为基础,补充了些试验,改变了某些条件后将其运用到实际生产中来,结果认为满意(数据见表)。又据的意见在 pH 值为1—3时,来测定铁,则其它金属离子不发生干扰。查有关文献,铅、锌、铜、镉、砷、钙、镁、钡、锰、铝、钼、汞、钴、镍、铬(<3毫克)钠、铵盐等均无影响(对主要元素曾进行印证试验, Based on the so-called terriol (ie EDTA) titration method proposed by the Soviet Union and the United States, we supplemented the tests with some conditions and applied them to the actual production. We are satisfied with the results (see table). According to another opinion at pH 1-3, to determine the iron, the other metal ions do not interfere. Check the literature, no impact on the lead, zinc, copper, cadmium, arsenic, calcium, magnesium, barium, manganese, aluminum, molybdenum, mercury, cobalt, nickel, chromium Have proof test,