PLIS Update VIII, Aug 25, 2003
We regrettably missed our last targeted update by four months but for all the good reasons. Greater difficulty was experienced in HSTEM development and production reliability. This in turn hindered other related developments resulting in no new information for the update. This took a dramatic change as of June 1 stimulating much testing and application evaluation.
Most of this data will be presented at the Oct20-23/03 Gulf Coast conference in Galveston, Texas.
This update will focus on the following areas:
1.Heated STEM (HSTEM/HPLIS): Once again more progress has been made in this area resulting in better overall performance and control of HSTEM temperature profile. Critical areas respectively run hotter and cooler which gives better analytical performance and seal longevity. Once the parameters are established so that the seal temperature is not exceeded, we have greater flexibility in calibrating the desired groove temperature for the targeted 350 C. As different groove volumes perform differently under the same operating conditions, each HSTEM must be individually calibrated and matched to the Power Control Module (PCM). Forty-seven units are in inventory eagerly awaiting challenging applications to join the ranks of the three units committed to existing customers.
Pictures of the new product and a virtual demo of the glowing HSTEM can be viewed by visiting our "Pictorials" page.
2. Ordering Guide: To reflect the new capabilities available from HPLIS/HSTEM and other new developments, a new ordering guide was required. Please visit our "Price/Config" page for specific details.
3. Varian 3800/1177 Interface: A new mounting interface has been developed for use with the Varian 3800 gc with the 1177 EFC Split/Splitless Capillary inlet. This option is listed in the new ordering guide. Visit our "Pictorials" page to see a picture of this system.
4.Micro GC interface: A new PLIS system setup has been tested as a pressurized liquid/heated sample inlet for heavy hydrocarbon (C9) analysis on a micro gc. A picture and the associated schematic as set up on the Varian 4900 can be viewed on our "Pictorials" page. Although the system worked well, it has not been set up as a standard product for production. Call TEI for a quotation.
5. Rental Evaluation: For product evaluation purposes, a short term "rent to purchase" plan is available for PLIS and HPLIS. Please view our "Brochure" for details.
6. Gulf Coast Conference: Oct20-23/03 Gulf Coast conference: Galveston, Texas. TEI will be in attendance at this conference presenting a paper, poster and a workshop. For more details, click on www.gulfcoastconference.com.
7. Micro Volume Gas Injection: For low pressure gas injections, a 12 uL Stem is available for PLIS.
Sample chromatograms of the above can be viewed n our "Applications" page.