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2007 vol. 3
Restek Performance Coatings
Protect Sample Integrity and Prolong Sampling SystemLifetime
Using Hydroguard™ Deactivated/Silcosteel
®
Treated Tubing
By Gary Barone, Restek Performance Coatings Division
• Prevents adsorption of sample components to an active surface.
• Long-lasting water resistance, increases instrument up-time.
• Specifically designed and tested for deactivating purge and trap or headspace systems.
Current regulations for drinking water and waste
water require quantifying contaminant compo-
nent concentrations at parts-per-trillion levels. As
the demands of analytical methods and the sensi-
tivity of analytical instruments advance, so has the
need for improved inertness of the components of
the sample pathway. In analyses at parts-per-tril-
lion concentrations, any surface activity in the
transfer system can adsorb significant amounts of
active analytes and greatly impact the reliability of
the data. Furthermore, components of purge and
trap or headspace systems often are in contact with
steam, which can create activity very quickly—
even in coated system components. To address this
need, we have created a superior surface for the
tubing in purge and trap or headspace systems:
Hydroguard™ deactivated/Silcosteel
®
treated stain-
less steel tubing.
For more than a decade, Restek’s proprietary
Silcosteel
®
and Siltek
®
/Sulfinert
®
treatments
†
have
been ideal solutions for creating inert stainless
steel pathways. Now, we have developed and rigor-
ously tested Hydroguard™ deactivated/Silcosteel
®
treated stainless steel tubing specifically to meet
the demanding requirements and environments of
purge and trap and headspace systems.
Hydroguard™ deactivated/Silcosteel
®
treated tub-
ing is preferred for situations in which water
vaporization is encountered, as in purge and trap
systems. Unique deactivation chemistry creates a
high-density surface that is not readily attacked by
hydrolysis. High-density Hydroguard™ deactiva-
tion at the outer surface effectively prevents water
vapor from contacting the Silcosteel
®
treated stain-
less steel surface below. Thus, an inert surface is
maintained in the face of highly aggressive condi-
tions, and active analytes pass through the tubing
without adsorbing to the surface.
Regardless of your application, we highly recom-
mend Hydroguard™ deactivated/Silcosteel
®
treated
tubing to improve analytical reliability from your
purge and trap or headspace system.
† United States patents 6,511,760 (Silcosteel
®
) and 6,444,326
(Siltek
®
/Sulfinert
®
).
Silcosteel
®
Treated Hydroguard™ Deactivated Electropolished 316L
Grade Stainless Steel Tubing
*0.020" wall thickness
**0.035" wall thickness
Price-per-foot
ID
OD
cat.# 5-24 ft.
25-99 ft. 100-299 ft. >300 ft.
0.085" (2.16mm)
1
/
8
" (3.18mm)*
22489
$25.90/ft. $20.70/ft. $17.40/ft. $14.50/ft.
0.180" (4.57mm)
1
/
4
" (6.35mm)**
22488
$25.90/ft. $20.70/ft. $17.40/ft. $14.50/ft.
Silcosteel
®
Treated Hydroguard™ Deactivated Seamless 316L Grade
Stainless Steel Tubing
Price-per-foot
ID
OD
cat.# 5-24 ft.
25-199 ft. 200-399 ft.
>400 ft.
0.055" (1.40mm)
1
/
8
" (3.18mm)** 22491
$15.50/ft.
$12.40/ft.
$10.40/ft.
$8.30/ft.
0.180" (4.57mm)
1
/
4
" (6.35mm)** 22490
$15.50/ft.
$12.40/ft.
$10.40/ft.
$8.30/ft.
Silcosteel
®
Treated Hydroguard™ Deactivated 304 Grade Stainless
Steel Tubing
Price-per-foot
ID
OD
cat.# 5-24 ft.
25-199 ft. 200-399 ft.
>400 ft.
0.010" (0.25mm)
1
/
16
" (1.59mm)
22497
$8.30/ft.
$5.20/ft.
$3.60/ft.
$3.10/ft.
0.020" (0.51mm)
1
/
16
" (1.59mm)
22496
$8.30/ft.
$5.20/ft.
$3.60/ft.
$3.10/ft.
0.030" (0.76mm)
1
/
16
" (1.59mm)
22495
$8.30/ft.
$5.20/ft.
$3.60/ft.
$3.10/ft.
0.040" (1.02mm)
1
/
16
" (1.59mm)
22494
$8.30/ft.
$5.20/ft.
$3.60/ft.
$3.10/ft.
0.085" (2.16mm)
1
/
8
" (3.18mm)* 22493
$8.30/ft.
$5.20/ft.
$3.60/ft.
$3.10/ft.
0.210" (5.33mm)
1
/
4
" (6.35mm)* 22492
$12.40/ft.
$7.20/ft.
$5.20/ft.
$4.10/ft.
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