Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10559676 | Talanta | 2011 | 5 Pages |
Abstract
Spectrophotometric determination of titanium(IV) was accomplished with o-carboxyphenylfluorone (OCPF) in the presence of hexadecyltrimethyl ammonium chloride (HTAC) under strongly acidic media. In the determination of titanium(IV), Beer's law was obeyed in the range of 24-340 ng mLâ1 with an effective molar absorption coefficient (at 530 nm) and relative standard deviation of 2.24 Ã 105 dm3 molâ1 cmâ1 and 0.64% (n = 8), respectively. The severe interference of iron ions was easily eliminated by the addition of ethylenediaminetetraacetic acid (EDTA); the effects of other foreign substances were low. Equilibrium and kinetic studies under analytical conditions were investigated to quantitatively evaluate the reaction mechanism. The obtained orange complex is considered to be Ti(OCPF)4. Its stability log Kf and rate constant Kobs are 16.88 and 1.65 Ã 10â2 sâ1, respectively. It is suggested that the color of the complex is related to the species of OCPF in the solution.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Mitsuru Hoshino, Shinichiro Kamino, Shota Mitani, Mamiko Asano, Takako Yamaguchi, Yoshikazu Fujita,