The applicability of acid degradation of organic peroxides into hydrogen peroxide in a pneumatically driven flow injection system with chemiluminescence reaction with luminol and Cu2þ as acatalyst(FIA-CL) was investigated for the fast and sensitive detection of organic peroxide explosives (OPEs).Thetarget OPEs included hexamethylene triperoxide diamine (HMTD),triacetone triperoxide (TATP) and methy-
lethyl ketone peroxide (MEKP). Under optimised conditions maximum degradations of 70% and 54%for TATP and HMTD,respectively were achieved at 162 mL min1, and 9% degradation for MEKP at180 mL min1. Flow rates were precisely controlled in this single source pneumatic pressure driven multi-channel FIA system by model experiments on mixing of easily detectable component solutions.
The linear range for detection of TATP, HMTD and H2O2 was 1–200 mM (r2¼0.98–0.99) atboth flowrates,
while that for MEKP was 20–200 mM (r2¼0.97) at 180 mL min1. The detection limits (LODs) obtained were 0.5 mM for TATP, HMTD and H2O2 and 10 mM for MEKP.The detection times varied from 1.5 to 3 min
in this FIA-CL system. Whilst the LOD for H2O2 was comparable with those reported by other in-vestigators , the LODs and analysis times for TATP and HMTD were superior,and significantly,thisis the first time the detection of MEKP has been reported by FIA-CL.
The applicability of acid degradation of organic peroxides into hydrogen peroxide in a pneumatically driven flow injection system with chemiluminescence reaction with luminol and Cu2þ as acatalyst(FIA-CL) was investigated for the fast and sensitive detection of organic peroxide explosives (OPEs).Thetarget OPEs included hexamethylene triperoxide diamine (HMTD),triacetone triperoxide (TATP) and methy-lethyl ketone peroxide (MEKP). Under optimised conditions maximum degradations of 70% and 54%for TATP and HMTD,respectively were achieved at 162 mL min1, and 9% degradation for MEKP at180 mL min1. Flow rates were precisely controlled in this single source pneumatic pressure driven multi-channel FIA system by model experiments on mixing of easily detectable component solutions.The linear range for detection of TATP, HMTD and H2O2 was 1–200 mM (r2¼0.98–0.99) atboth flowrates,while that for MEKP was 20–200 mM (r2¼0.97) at 180 mL min1. The detection limits (LODs) obtained were 0.5 mM for TATP, HMTD and H2O2 and 10 mM for MEKP.The detection times varied from 1.5 to 3 minin this FIA-CL system. Whilst the LOD for H2O2 was comparable with those reported by other in-vestigators , the LODs and analysis times for TATP and HMTD were superior,and significantly,thisis the first time the detection of MEKP has been reported by FIA-CL.
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