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偶氮氯膦-mN(简称CPA-mN)是稀土元素的一种新型显色剂。曾有文献报道:在掩蔽剂存在下,可用CPA-mN测定钢铁、矿石中的铈组稀土分量和稀土总量。对铈组稀土,灵敏度可达7.8×10~4l·mol~(-1)·cm~(-1)。吴斌才等曾研究Ce-CPA-mN-CPB三元胶束增溶体系的显色反应,使显色灵敏度进一步提高,摩尔吸光系数可达1.9×10~5l·mol~(-1)·cm~(-1).本文研究了镧(Ⅲ)与CPA-mN显色反应的最佳条件,确定了在此条件下络合物组成比为1:4,并在此
Chlorophosphonazo-mN (abbreviated CPA-mN) is a new type of rare earth element developer. It has been reported in the literature: in the presence of masking agents, available CPA-mN determination of steel, ore of cerium group rare earth components and the total amount of rare earth. For rare earths of cerium group, the sensitivity is up to 7.8 × 10 ~ 4l · mol ~ (-1) · cm ~ (-1). Wu et al. Studied the color reaction of Ce-CPA-mN-CPB ternary micellar solubilization system and further enhanced the color developing sensitivity with a molar absorptivity of 1.9 × 10-5 mol · cm -1 ~ (-1) .The optimal conditions for the color reaction of lanthanum (Ⅲ) with CPA-mN were studied in this paper, the complex composition ratio of 1: 4 was determined under this condition,