@article{oai:kanazawa-u.repo.nii.ac.jp:00008309,
 author = {Ueda, Kazumasa and Matsuda, Hideaki and Yoshimura, Osamu},
 issue = {6},
 journal = {Analytical Sciences},
 month = {Jan},
 note = {4-(2-Thiazolylazo)-6-bromoresorcinol (TAR-Br) was synthesized and its usefulness for spectrophotometric determina¬tion of 14 lanthanoid(lll) ions was examined. The acid dissociation constants of the reagent and the stability constants of the complexes (1:1) were determined, and the complexing behavior was studied. The optimum pH for complexation lies between 6.8 – 8.7. Beer's law holds up to about 2.5 ppm of each lanthanoid, with a molar absorptivity of bxlOUmol−1 cm−1 level near 553 nm. The addition of ethanol produced some sensitization effect, due to solvation with the complexes. Both the molor absorptivities and the stability constants were larger in light lanthanoids with the atomic number, but the latter were slightly lower in heavy lanthanoids. TAR-Br was classified as a second ligand group member according to the Moeller's type classification. © 1989, The Japan Society for Analytical Chemistry. All rights reserved.},
 pages = {725--728},
 title = {Complexation of Lanthanoids with 4-(2-Thiazolylazo)-6-bromoresorcinol},
 volume = {5},
 year = {1989}
}