Figure 1From: A new and sensitive reaction rate method for spectrophotometric determination of trace amounts of thiourea in different water samples based on an induction period Absorption spectra of reaction system with scan time intervals of 30 s (a to i). (a) In the absence of TU and (b) in the presence of 0.50 μg mL−1 TU. Conditions: H2SO4, 0.030 M; MCP, 5.2 × 10−5; KBr, 1.3 × 10−3 M; KBrO3, 3.0 × 10−3 and temperature of 25°C.Back to article page