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微量铁的光度法测定,常用邻菲啰林法和磺基水杨酸法,但共存的铜、钴、镍都严重干扰其测定,文献指出,用二安替比林甲烷可测定微量铁,而且允许较大量的铜、镍存在,但钴仍有较大的干扰。为此,我们用二安替比林甲烷作显色剂,双波长等吸收法消除钴的干扰,又用K系数法同时消除钴-镍或钴-铜的干扰,使微量铁的测定取得良好的结果。
Trace iron spectrophotometry, commonly used phenanthroline method and sulfosalicylic acid method, but the coexistence of copper, cobalt and nickel all severely interfere with its determination, the literature pointed out that the use of diampyridin methane can be measured trace iron, But also allows a larger amount of copper and nickel to exist, but there is still a large interference of cobalt. For this purpose, we use diantipyrylmethane as a color former and double-wavelength absorption method to eliminate the interference of cobalt, and use the K-factor method to eliminate the interference of cobalt-nickel or cobalt-copper at the same time to make the determination of trace iron good the result of.