Hours of Storage
RelativeResponse:
methyl mercaptan
:
dimethyl sulfoxide
SilcoNert 2000
TreatedCylinders
120
100
80
20
0
0 10 20 30 40 50 60
®
SulfurCompoundStorage inSilcoNert 2000Treated vs.
UntreatedSampleCylinders
Figure 1depicts performance results from a comparison inwhich a
gas containing17ppbv of hydrogen sulfidewas stored for 7days in
untreated and inSilcoNert 2000 treated stainless steel high pressure
sample cylinders. The results show aSilcoNert 2000 treated sampling
systemwill reliably store low levels of this active sulfur-containing
compound in process streams for longperiods of time. In contrast,
hydrogen sulfide degraded rapidly in the untreated cylinder, andwas
totally adsorbedwithin 24 hours.
Figure 2 summarizes the results of a similar study inwhich gas
containing 18.8ppbvmethyl mercaptanwas stored for 60 hours in
SilcoNert 2000 treated sample cylinders. Again, recovery of
the
active sulfur gaswas accurate at the lowppbv concentration,
confirming that the samplewas stored in contact with an inert surface.
®
Deactivated Sampling and
Transfer System Components
SilcoTek
®
surface treatments enable quantitative delivery of active compounds.
SilcoNert
®
2000 formerly Siltek
®
& Sulfinert
®
US Patent 6,444,326
& 6,511,760
®
1FOO5FDI%S
|
#FMMFGPOUF 1"
|
'BY
Maximize the
performance of your
products
Theultimatepassivation for
Stainless steel, glass, steel, and
highnickel alloysof steel.
A required treatment formetal
componentswhenanalyzing for
parts-per-billion levelsof
organo-sulfur compounds.
SilcoNert
®
2000 surface treatment eliminates surface adsorption of
active compounds on steel, glass, ceramic and carbon surfaces.
Figure1
Sulfur compounds are stable inSilcoNert 2000 treated
stainless steel systems - 17ppbv hydrogen sul"de in 500mL cylinders
1
Data courtesy of Restek
®
Corp.
Figure2
18.8ppbvmethyl mercaptan is stable for over 60 hours
in 300mLSilcoNert 2000 cylinders
1
®
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
1
2
3
6
7
SilcoNert
®
2000TreatedCylinder
®
UntreatedCylinder
Days of Storage
Relative Response:
hydrogen sulfide dimethyl sulfoxide
2/28
33
