DETector Engineering
&
Technology, inc.
486 N.Wiget Lane,Walnut Creek,CA 94598USA
telephone: (925) 937-4203
fax: (925) 937-7581
DET
e-mail:
innovations in chemical detection
THERMIONIC SURFACE IONIZATION DETECTION FORGC
selectivity for NITROGEN and PHOSPHORUS compounds (NPD)
PESTICIDES ON AGILENT 6890 GC
DRUGS OF ABUSE
1
750 pg each
1=Mevlnphos
2=Trlfluralin
3=SilTl8zine
4=Methyl Parathion
5=Malathlon
NPD(TID-2)
128 pA f.5.
TID-2 Ion Source
2 .90 A heat
- 5
V
polarlzatlo
2
3
4
5
2
TID-1-AIR
64 pA f .5.
TID-1 Ion Sourco
2 .45 A heat
-45
V
polarlzatlo
3
4
_Methamphetamine (Speed)
NPD 256 pAlmV
TID-4 Ion source:
h ••t-Z.65 A , p o larizatlon- 6V
detector gases:
hydrogan-3. air-50, nttrogan-10 mUmln
3 .4-MDMA (Ecstacy)
I
l
Heroin
TID-1 64 pAlmV
TID~1
Ion source:
h ••t-2....0 A . polarlzation- ·45 V
detector gases:
nitrogen-55, . 1r-5 m U m ln
I
TID-2 Black Ceramic designed for sharp P peaks
TID-4White Ceramic designed for best N response
TID-1 mode is more compound selective than NPD
NPD (TID-4)
512 pA
1'.5.
4-Nitrotoluene
29 ng
RDX
1 2
1
ng
TID-1 -Nitrogen
512 pA
1'.6.
TNT
0.29 ng
Drug Sample (N compounds)
caffeine
NPD
nicotine
TID-4 Ion sourco
heat=2.65 A
cotlnlne
polarlz.= 3.5
V
1024 pA full scale
diazepam
TID-1-Nitrogen
TID-1 Ion source
heat=2.45 A
polarlz.= - 90
V
512 pA f'ul! scale
4-Nitrotoluene
I
RDX
I
-
Nitro Explosives detection - NPD detects all N compounds - TID-1 mode has exceptional sensitivity for TNT
