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本文提出以P_(507)为固定相,盐酸为流动相的萃取色谱法把铈从溶液中分离出来,以偶氮氯膦-mN与铈的高灵敏显色反应进行比色。本法灵敏度ε=7.8×10~4。 实验部分 色谱柱:φ8×120m/m 硅烷化硅球100—120目(上试一厂出品) P_(507)(上海有机化学所实验工厂) 偶氮氯膦-mN0.05％水溶液 杂质洗除液:5％NH_4Cl,2％磺基水杨酸,1％抗坏血酸,调至ρH2—3 铈、镧、镨标准液:用光谱纯的氧化铈,氧化镧,氧
In this paper, cerium was separated from the solution by P (507) as mobile phase and hydrochloric acid as the mobile phase. The colorimetric reaction of chlorophosphonazo-mN with cerium was performed. The sensitivity of the law ε = 7.8 × 10 ~ 4. Experimental part Column: φ8 × 120m / m Silanized silica balls 100-120 mesh (produced by the first test plant) P_ (507) (Shanghai Organic Chemical Laboratory) Chlorophosphonazo-mN 0.05% aqueous solution Impurities Liquid: 5% NH 4 Cl, 2% sulfosalicylic acid, 1% ascorbic acid, adjusted to ρH 2 -3 cerium, lanthanum, praseodymium standard solution: Spectrally pure ceria, lanthanum oxide,