DETector Engineering
&
Technology, inc.
486N.Wiget Lane,Walnut Creek, CA 94598USA
DET
telephone: (925) 937-4203
fax: (925)
937~7581
e-mail:
innovations in chemical detection
RTIAfTID·1 •DetectionofTNTResidue
reactorT:150degC,air pump: 300mUmin
ionsourceheat
=
2.90A,polarization
=•
45V
fingerswith
sample· ceramic rod rolled
1
microgram
TNT-
between thumb and forefinger
for 10seconds, then rod
inserted intohot reactor
64pA full scale
fingers washed
aggresivelyafter
normal
TNT
exposure
finger residue
1
1
s.:
some residual
nosignal largeoffscalesignal
signal
RTIAlTID-1 detectionofaTNT trace residueon
a finger. Sampling procedure consisted of
rolling the tip of a ceramic rod between the
thumb and forefinger, and then inserting the
rod into the RTIA reactor equippedwith a
TID-1 detector which has exceptional
sensitivity for Nitro explosives like TNT.
RTIAlNPD -methanol wipeof surfaceof anapple
wipe transferred toceramic rod, rodinto275degCRTIA
waxed
2ndmethanol
non-organic
wipeofwaxed
apple
apple
10240pAfull scale
waterscrub
ofwaxedapple
thenmethanol rewipe
j
organic
jJ
ndmethanol
apple
Wipe ofwater
sC~Ple
~
RTIAlTID-1 -methanol wipeofwaxed applesurface
TID-1 detectsresidue of lower
volatility than theNPD
residuedetectio
/I
-.
256 pA full scale
rod removed from reactor
'------ - - - - -- --- - - - - -
RTIAlNPD
&
RTIAlTID-1 detection of an
Apple's Wax coating. Sharp rise and fall of
NPD signal corresponded to a more volatile
component than the slower oxidizing
components detected by TID-1. The TID-1
signal was likelydue to CH
2
groups in the wax
compounds. However, it is not clear what
compounds produced the NPD signal, since
that detector has high sensitivity to N or P
compounds, but discriminates against
Hydrocarbons:'
\ .
..
.
off.;>' •
.
..,:.
':
Website :
E-mail :
TelNo : 03 9762 29034 . . . inAUSTRALIA
