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用流动注射光度法测定铁的研究已有报道,最近酒井忠雄等人曾以2-亚硝基-ESAP为显色剂,采用流动注射法测定了环境试样及血清中铁,测定范围0.05～0.5ppm,但测定速率仅为20样次·时~(-1),且所用试剂尚无商品出售。为改善测定的条件,本文利用自己组装的带笔录仪的流动注射分析系统上,选用邻菲罗啉作为铁的显色剂,建立了一个可以测定0～4ppm铁溶液的分析方法,水样不必浓缩,检测下限达0.02ppm,适用于工业水、炉内水,循环水及天然水中铁的测定。试验部分一试剂铁标准溶液:称取0.4978克硫酸亚铁(FeSO_4·7H_2O)溶于0.1M HCl 50ml中。移至1升量瓶中,
Flow injection spectrophotometry for the determination of iron has been reported. Recently, Tadao Sakai and others once used 2-nitroso-ESAP as chromogenic reagent, and the flow injection method was used to determine the contents of iron in the environment and serum. The determination range was 0.05-0.5 ppm, but the assay rate was only 20 samples · hr -1, and no reagents were used for sale. In order to improve the determination conditions, this paper established a method for the determination of 0 ~ 4ppm iron solution by using the self-assembled flow injection analysis system with a recording instrument, using o-phenanthroline as the chromogenic reagent of iron. Concentration, the detection limit of 0.02ppm, suitable for industrial water, furnace water, circulating water and natural water determination of iron. Experimental part of a reagent iron standard solution: Weigh 0.4978 grams of ferrous sulfate (FeSO 4 · 7H 2 O) was dissolved in 0.1M HCl 50ml. Move to 1 liter volumetric flask,