A colorimetric sensor array for detection of triacetone triperoxide vapor

Area of Science:

• Analytical Chemistry
• Materials Science
• Chemical Engineering

Background:

• Triacetone triperoxide (TATP) is a highly dangerous primary explosive.
• TATP is difficult to detect directly due to its lack of UV absorbance, fluorescence, or facile ionization.
• Existing detection methods are often expensive, require extensive sample preparation, or cannot detect TATP in the gas phase.

Purpose of the Study:

• To develop a simple, highly sensitive colorimetric sensor for TATP vapor detection.
• To enable semiquantitative analysis of TATP vapor.
• To overcome the limitations of current TATP detection techniques.

Main Methods:

• Utilized a solid acid catalyst to pretreat the gas stream.
• Employed a colorimetric sensor array of redox-sensitive dyes.
• Analyzed acid decomposition products of TATP for detection.

Main Results:

• Achieved semiquantitative detection of TATP vapor from 50 ppb to 10 ppm.
• Established limits of detection (LOD) below 2 ppb for TATP vapor.
• Demonstrated selectivity against common interferences and other chemical oxidants.

Conclusions:

• The developed colorimetric sensor array provides a sensitive and selective method for TATP vapor detection.
• This technique offers a simple and rapid approach for identifying TATP, even at low concentrations.
• The sensor array can differentiate TATP from other oxidants and is robust against common interfering substances.