| Popis: |
The spectrophotometric determination of titanium(IV) with thiocyanate by extraction of the tetraphenylarsonium and tetraphenylphosphonium ion-association complexes is described. The extracted complexes in chloroform have a maximum absorbance at 420 nm, obey Beer's law in the range 0.1–1 μg Ti ml−1, and are stable for at least 5 hr. The molar absorptivity of the method is 7.5 × 104 liters mol−1 cm−1. The described method is sensitive, selective, and reproducible. The composition of the extracted complexes was studied in solution and in solid state. The complexes [(C6H5)4X]2 [Ti(NCS)6] (X = As, P) were isolated from the chloroform solution. |
