Thermal desorption is an injection technique for gas chromatography wherein the sample is heated to release analytes into the GC carrier gas stream. Different thermal desorption modes and devices can be utilized with a thermal desorber, in order to handle gas, liquid and solid samples.
Direct thermal extraction (DTE) is a thermal desorption technique in which a small amount of sample, typically 10-50 mg, is placed in an empty thermal desorption tube. The sample is heated in the thermal desorption unit under a flow of inert gas, in order to release volatile and semi-volatile compounds from the sample. The analytes are trapped and then analyzed by GC/MS.
The Gerstel Twister is a PDMS coated stir bar which can be used in headspace or immersion mode to extract analytes from either solid or liquid samples. Thin Film SPME (TF-SPME) devices are a 20 mm x 4.8 mm sheet of carbon mesh coated with DVB/PDMS or CAR/PDMS. They also can be used in headspace or immersion mode. Both Twisters and TF-SPME are analyzed by thermal desorption.
Air samples are handled by using thermal desorption tubes packed with a solid sorbent material. Air can be actively pumped through the tube or the sorbent tubes can be used for passive diffusive sampling. The sorbent tubes are analyzed by thermal desorption.
This talk will focus on these techniques and show examples of each.
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Don’t forget, you may renew your membership at the same time as buying your ticket.
Congratulation to Sarah Lum, Notre Dame graduate student and CCDG 2018 Young Chromatographer Award Winner for presenting “Battling the Backlog: Novel CZE Systems for Rape Kit Analysis”
We would also like to thank our other two speakers who also did an outstanding job;
Kayla Watanabe, Stevenson High School and Loyola Summer Intern
“The Correlation of Physicochemical Properties with Chromatographic Separation of Dichlorophenols in the Gas Phase”
Gosia Medrecki, Loyola undergraduate student and Agilent intern
“A Novel Sample Preparation for quantifying Vitamin D from Dog Food”
Thank you all for another wonderful Young Chromatographer dinner meeting!
CCDG is proud to host it’s second Young Chromatographer meeting. Established in 2017, the CCDG Young Chromatographer Award is designed to be awarded to a young person who presents their original research at our student dinner meeting. CCDG is committed to promoting an interest in and providing a forum for, the exchange of information in all areas of chromatography. As part of our philanthropy strategy, the group has established this award to encourage young scientists to do research and provide a forum for their presentation.
We will be featuring the following speakers:
The dinner meeting and presentation is scheduled for November 7th, 6:30-9pm, Loyola University (Chicago), 1000 W. Sheridan Rd, Cuneo Hall, Room 210, Chicago, IL 60626
To see past winners and get more information click here
Congratulations – Amy Alexander
UCT’s 2018 Excellence in SPE Award winner
A huge round of applause to our President Amy Alexander for being selected as a 2018 Excellence in SPE Award winner. This award is sponsored by United Chemical Technologies (UCT) and was awarded at the Society of Forensic Toxicologists (SOFT) meeting in Minneapolis, MN. The award reflects recent outstanding contributions to the scientific literature in the field of Solid Phase Extractions in Forensic Science. Specifically, UCT is recognizing the article “Discordant Umbilical Cord Drug Testing Results in Monozygotic Twins” where Amy served as the principle author.
Title: GC Tips and Trick for Method Optimization
Abstract: This looks at what options are available when attempting to make the best GC method possible. We will discuss the advantages and disadvantages we may see when making changes to our method and why these changes happen. This includes the differences between carrier gasses, inlet liners, and what kind of influence changes to our column dimensions will have. From this discussion, we will be able to make educated decisions on how best to achieve our desired goals and where to find resources should we have questions.
Location: Westwood Tavern and Tap 1385 N. Meacham Road Schaumburg, IL (Chicago Room)
Who: Eric Pavlich
Bio: Eric is a graduate from the University of Arkansas. He started his career as a microbiologist for a pharmaceutical manufacturer and eventually migrated to more analytical chemistry techniques in dealing with polymer research and cosmetics. In 2003, Eric joined Varian Analytical conducting sales for consumable supplies. When Agilent acquired Varian in 2010, Eric took on the role of Application Scientist where he assists those in need of GC Application help. Along with helping analysts optimize their methods, Eric also helps educate those that are trying to expand their knowledge in Gas Chromatography. (In-depth bio)
CCDG is excited to announce the 2018 Gas Chromatography school. Co-sponsored by Roosevelt University and held on their campus, this course offers a well-designed combination of lecture and hands-on laboratory training. Students gain sufficient theoretical and practical background to perform independent work in gas chromatography.
This three day course, taught by Dr. Lee Polite from Axion, will provide instruction on a wide range of topics, including but not limited to:
Registration fee: $995 (includes text, supplies and lunches) | $500 for students
Printed course material is provided, at no extra cost to the student, by the Chicago Chromatography Discussion Group.
1400 N Roosevelt Blvd,
Schaumburg IL, 60173
CCDG is a proud supporter of HPLC 2018. We provided a Travel Grant to HPCL 2018, the 47th International Symposium on High Performance Liquid Phase Separations and Related Techniques, July 29-August 2, 2018 in Washington, DC. We are excited to announce the winner of the travel grant; Sarah Lum from the University of Notre Dame!
Sarah Lum is a bioanalytical chemist working in scientific technology development. After learning about the enormous backlog in rape kit processing, Sarah became passionate about utilizing her analytical skillset to design a technology to address this injustice. In 2016, she obtained a patent on a novel CZE system for the forensic analysis of sexual assault evidence. Since then, she has traveled to crime labs across the U.S. to share her work and engage in conversation with law enforcement officers, crime lab analysts, and government officials to work together in battling the rape kit backlog.
Sarah’s work has been recognized with the 2017 Young Scientist Award at the Microscale Separations and Bioanalysis International Symposium in Noordwijkerhout, The Netherlands. She was named a 2017 U.S. National Institute of Justice Graduate Research Fellow, and has been featured in The Analytical Scientist, Biola Magazine, and the Notre Dame (ND) Magazine. In addition to her research, Sarah is passionate about leadership, mentorship, and outreach. She served two terms as the President of the Association for Women in Science at Notre Dame where she developed a STEMentorship Program for undergraduate women in STEM and chaired the 2016 inaugural Women in Science Regional Conference. Sarah also leads the ND Chemistry Demonstration Team, and was named a 2017 National Science Foundation Ethical Leaders in STEM Fellow.
Sarah graduated Magna Cum Laude with a B.S. in Biochemistry from Biola University in 2010 and is currently a Chemistry Ph.D. Candidate working with Dr. Norman Dovichi at the University of Notre Dame.
We would like to thank our outgoing President, Rich DeMuro for his hard work and stewardship, and welcome Amy Alexander as our incoming President.
The 2017-2018 board would like to thank everyone for a wonderful season and we look forward to an even better season in 2018-2019!
The CCDG board approved a change to the membership year at the May 8, 2018 board meeting. The membership year will now follow a calendar year January 1 to December 31. All members who were paid and in good standing receive an extension until December for their current membership.