5-Br-PAN-S作为光度显色剂的研究

Study of 5 Br-PAN-S as a Spectrophotometric Agent

5-Br-PAN-S是一种水溶性的光度显色剂。本文研究了十一种金属离子和5-Br-PAN-S的络合反应,测定了各种金属络合物的pH效应、组成和摩尔吸光系数。Pb^(2+)、Hg^(2+)、V^(5+)、Pd^(2+)及Cu^(2+)(pH≤6)与5-Br-PAN-S的络合比为1∶1,而Fe^(2+)Co^(2+)、Co^(3+)、Ni^(2+)、Cd^(2+)、Zn^(2+)、Mn^(2+)和Gu^(2+)(pH≥8)均为1∶2。由于5-Br-PAN-S金属络合物都溶于水,且灵敏度较高,所以5-Br-PAN-S作为光度显色剂对于多种离子测定都具有一定的应用价值。

5-Br-PAN-S is a water-soluble reagent. The reactions of 5-Br-PAN-S with eleven metal ions are studied. The effiect of pH, compositions and molar absorption coefficients for various metallic complexes are measured. The ratio of Pb2+, Hg2+, V5+, Pd2+, and Cu2+(PH≤6) with 5-Br-PAN-S are 1:1, and Fe2+, Co2+, Ni2+, Cd2+, Zn2+, Mn2+ and Cu2+(PH≥8) are 1:2. 5-Br-PAN-S as a spectrophotometric agent is good for many metal ions because of their water-soluble complexes and sensitivities.