245 / 413
•
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•
2007 vol. 4
Restek Performance Coatings
Figure 2
Sulfinert® treated tubing (red) does not adsorb methyl
mercaptan (500ppbv), giving accurate results with no delay.
Conclusion
We obtained more accurate data, with no delay
between samples, by using Sulfinert® treated elec-
tropolished tubing in the sampling-storage-trans-
port system. In contrast, we obtained significantly
less accurate data, with delays of more than two
hours between samples, by using untreated tubing.
Improved accuracy and reliability of data for sul-
fur mean downstream processes can be more pre-
cisely controlled, with associated cost savings.
Shorter cycles translate directly into more samples
collected and analyzed in a given period of time.
Analysts charged with monitoring sulfur levels can
significantly improve efficiency and profitability
by using Sulfinert® treated tubing and compo-
nents.
Acknowledgement
The authors thank O’Brien Corporation for arranging the
research studies and supplying the electropolished tubing.
To learn more about O’Brien Corporation, visit
www.obrien-analytical.com.Figure 3
Sulfur memory is prolonged in raw commercial grade
stainless steel tubing, increasing cycle time and reducing accuracy.
This article is an analytical summary.
For the complete study, visit us at
www.restek.comor call 800-356-1688,
ext. 5 and request lit. cat.# 59082.
Sulfinert
®
Treated
Electropolished Tubing
Sulfinert® Treated Swagelok® Sample Cylinders
Ideal for collecting and storing samples, such as natural gas or beverage-grade carbon dioxide, because
active compounds remain stable during transport.
Size
qty.
cat.#
price
75cc
ea.
24130
$211
150cc
ea.
24131
$239
300cc
ea.
24132
$245
500cc
ea.
24133
$273
1000cc
ea.
24134
$453
2250cc
ea.
21394
$896
Sulfinert® Treated Alta-Robbins Sample Cylinder Valves
• All wetted parts are Sulfinert® treated for inertness.
• Compatible with Sulfinert® treated Swagelok® sample cylinders.
• Large, durable, Kel-F® seat ensures leak-free operation; temperature range: -40°C to 120°C.
*To order catalog #21402 (Sulfinert Alta-Robbins Sample Cylinder Valve,
1
/
4
" NPT with Dip Tube), please call Customer Service at
800-356-1688, ext. 3, or contact your Restek representative. Specify dip tube length or % outage when ordering (maximum length =
5.25"/ 13.3cm). Note: End of part will not be treated after cutting tube to length.
Description
qty.
cat.#
price
1
/
4
" NPT Exit
ea.
21400
$185
1
/
4
" Compression Exit
ea.
21401
$185
1
/
4
" NPT with Dip Tube*
ea.
21402
$268
1
/
4
" NPT with 2850psi Rupture Disc
ea.
21403
$376
1
/
4
" NPT Male Inlet x
1
/
4
" Female Outlet with 2850psi Rupture Disc
ea.
21404
$376
21401
21400
21402
21403
21404
Sulfinert
®
Treated
Electropolished Tubing