On-site rapid detection and discrimination of TATP and DADP based on chemical colorimetric method

Based on the reaction between peroxide explosives and potassium titanyl oxalate under acidic conditions, an on-site rapid detection and discrimination method for triacetone triperoxide （TATP） and diacetone diperoxide（ DADP） was established. The results showed that H2SO4with a volume fraction of 60% was the best initiator for the decomposition reaction, and the rapid color development and discrimination can be realized within 1 min. The visual detection limits of TATP and DADP were 3. 0x10-5mol/L and 4. 05x10-3mol/L, respectively. Based on the chemical colorimetric results, a standard colorimetric card was made to realize the qualitative and semi-quantitative analysis of peroxide explosives. The spiked recoveries of TATP and DADP in the matrix samples were 95. 3%-107. 4%, and the relative standard deviations were 0. 5%-7. 6%. By controlling the concentrations of acids or comparing color development at the same reaction time and sample concentrations, TATP and DADP can be preliminarily distinguished. © 2023, Youke Publishing Co.,Ltd. All rights reserved.