Spectrophotometric Determination of Titanium(IV) with Calcones Contained in a Japanese Herb, "Ashitaba"

Abstract

A new, simple and sensitive spectrophotometric method for the determination of Ti(IV) was established. The method was based on complex formation among 4-Hydroxyderricin (Hy) or Xanthoangelol (Xa) and Ti(IV) in the presence of anionic surfactant. {Hy} : Beer's law was obeyed in the range of 0.01∼0.96 μg/mL for Ti(IV) in a strong acidic medium. The effective molar absorptivity at 433 nm and 0.65% (n = 6). {Xa} : Beer's law was obeyed in the range of 0.02∼0.74 μg/mL for Ti(IV) in a strong acidic medium. The effective molar absorptivity at 429 nm and 0.53% (n = 6), respectively.