论文部分内容阅读
4,7-二苯基-1,10-邻菲啰啉(下简称BP)是1,10-邻菲啰啉的衍生物,与铁(Ⅱ)形成的络合物稳定性增加,水溶性减小,灵敏度为母体的两倍。Cl~-、SO_~(2-)、NO_3~-、Ac~-、ClO_3~-存在时不干扰。当铜存在时下述阴离子产生沉淀但不干扰测定:I~-、CNS~-、CN~-、S_2O_3~(2-)、S~(2-)、PO_4~(3-)。不干扰的金属离子有:RE、Th~(4+)、Ti~(4+)、VO_3~-、W~(6+)、UO_2~(2-)、Mn~(2+)、Fe~(3+)、Ru~(3+)、Os~(8+)、Ni~(2+)、Pt~(2+)、Ag~+、Zn~(2+)、Cd~(2+)、Hg~(2+)、B~(3+)、Al~(3+)、Ga~(3+)、Tl~+、Sn~(4+)、Pb~(2+)、As~(5+)、Be~(2+)。Co~(2+)与BP形成微黄色络合物但不被萃取。Cu~(2+)和BP形成CuR_2~+黄色络合物在微酸性介质中成为CuR~+无
4,7-Diphenyl-1,10-phenanthroline (hereinafter referred to as BP) is a derivative of 1,10-phenanthroline. Its stability with iron (Ⅱ) is increased, and its solubility in water Reduce, the sensitivity of the mother twice. Cl ~ -, SO_ ~ (2 -), NO_3 ~ -, Ac ~ -, ClO_3 ~ - do not interfere. The following anions precipitate when the copper is present but do not interfere with the determination: I ~ -, CNS ~ -, CN ~ -, S_2O_3 ~ (2 -), S ~ (2 -), PO_4 ~ (3-). Non-interfering metal ions are RE, Th 4 +, Ti 4+, VO 3+, W 6+, UO 2 2-, Mn 2+, Fe 2+, (3 +), Ru3 +, Os8 +, Ni2 +, Pt2 +, Ag +, Zn2 +, Cd2 + , Hg ~ (2 +), B ~ (3 +), Al ~ (3 +), Ga ~ (3 +), Tl ~ +, Sn ~ (4 +), Pb ~ (2 + 5 +), Be ~ (2+). Co ~ (2+) forms a yellowish complex with BP but is not extracted. Cu 2+ and BP form CuR 2 + yellow complexes CuR + in slightly acidic medium