Hydrogen peroxide vapour indicator

作者：Mills Andrew^*; Grosshans Pauline; Snadden Eilidh

来源：Sensors and Actuators B: Chemical , 2009, 136(2): 458-463.

DOI：10.1016/j.snb.2008.12.032

• Indicator
• Hydrogen peroxide
• Lissamine green
• Triarylmethane
• Vapour
• TATP

A hydrogen peroxide vapour indicator is described comprising a triarylmethane dye, lissamine green (LG), dissolved in a polymer, polyvinyl alcohol (PVA). The indicator is green/blue in the absence of hydrogen peroxide vapour but is rapidly bleached in the presence of hydrogen peroxide vapour. The kinetics of LG bleaching appear approximately first order with respect [LG] and the concentration of H(2)O(2), which, in turn, is proportional to the partial pressure of H(2)O(2). However, the kinetics also appear to depend directly upon the reciprocal of the film thickness, implying some dependence upon the diffusion of the H(2)O(2) vapour through the indicator film. Like most other H(2)O(2) indicator films (such as starch-iodide paper), the LG/PVA indicator is not particularly selective and responds to most other volatile strong oxidising agents, such as ozone and chlorine. However, it is rapid in response (<5 min) and easy to use and has potential as a simple indicator of strong oxidising agents; in particular it may be used to screen the headspace above liquids for H(2)O(2). which can be used for making in situ explosives, such as triacetone triperoxide (TATP).

• 出版日期2009-3-2