论文部分内容阅读
本文提出在TBP存在下,由于协同萃取作用,可以用苦酮酸和环已烷萃取微量钙。从而使钙离子与大量铬、铝、钛等高价离子相分离。将本方法应用于钢铁中微量钙的测定时,尚须先用甲基异丁酮分离大量铁,DDDC—氯仿萃取分离钴、镍、锰等二价金属离子。然后用苦酮酸—TBP—环已烷萃取钙,于稀盐酸反萃液中用偶氮氯膦Ⅲ或安替比林偶氮Ⅲ进行比色测定。
In this paper, it is proposed that trace amounts of calcium can be extracted with both ketorolac and cyclohexane in the presence of TBP due to synergistic extraction. So that a large number of calcium ions and chromium, aluminum, titanium and other high-priced ion phase separation. When this method is applied to the determination of trace calcium in steel, a large amount of iron must be separated with methyl isobutyl ketone. DDDC-chloroform extraction is used to separate the divalent metal ions such as cobalt, nickel and manganese. Calcium was then extracted with tartaric acid-TBP-cyclohexane and the colorimetric assay was carried out in dilute hydrochloric acid stripping solution using either chlorophosphonazo III or antipyrine azo III.