Figure 3From: A new and sensitive reaction rate method for spectrophotometric determination of trace amounts of thiourea in different water samples based on an induction period Effect of H 2 SO 4 concentration. Conditions: TU 0.50 μg mL−1; MCP, 5.2 × 10−5 M; KBr, 1.3 × 10−3 M, KBrO3, 3.0 × 10−3 and temperature of 25°C.Back to article page