Elimination of interferences from surface active substances in voltammetric determination of trace amounts of titanium in environmental water samples

Abstract

A cathodic stripping voltammetric method for determination of Ti(IV) in water samples containing high concentrations of surfactants is described. The linear calibration plot for Ti(IV) was achieved in the simultaneous presence of 5 mg L-1 anionic, 1 mg L-1 cationic and 2 mg L-1 nonionic surfactants for an accumulation time of 30 s in the range 2.5 × 10-8 to 5 × 10-7 mol L-1, the detection limit for accumulation time of 30 s was about 8.4 × 10-9 mol L-1. The developed method was successfully applied to Ti(IV) determination in environmental waters, such as river water (Bystrzyca, Czerniejówka), stagnant water (Lake Zemborzyce) and rain water (collected from eastern areas of Poland) with satisfactory results.

Keywords

• Titanium (IV)
• Determination
• Adsorptive stripping voltammetry
• Environmental waters