Our good friend, Ron Moore, Esquire writes us “I actually had a client researching lawyers who looked at the Truth About Forensic Science geek of the week posts and liked my answers. It made a difference in who he decided to hire. Thanks!” So, there is a lot of value in www.TheTruthAboutForensicScience.com Forensic Science Geek of the Week Challenge. Try it out today.
Forensic Science Geek of the Week
Thanks to the combined inspiration of Christine Funk, Esquire and Chuck Ramsay, Esquire, a new twist of this blog is being introduced. A weekly fun forensic science challenge/trivia question. The winner will be affectionately dubbed “www.TheTruthAboutForensicScience.com Forensic Science Geek of the Week.”
Rules:
- The challenge will be posted Sunday morning 12 noon EST.
- Answers to the challenge will be entered by responding to this blog post or thewww.TheTruthAboutForensicScience.com FaceBook fan page.
- All comments that are answers to this blog will released after 9pm EST.
- The first complete and correct answer will be awarded the envious title of “www.TheTruthAboutForensicScience.com Forensic Science Geek of the Week”
- “www.TheTruthAboutForensicScience.com Forensic Science Geek of the Week” is entitled a one time post of his/her picture on this blog and the www.TheTruthAboutForensicScience.com FaceBook fan page. The coveted title will be his/her for that week. Additionally, a winner will be allowed one link to one webpage of his/her choice. Both the picture and the weblink is subject to the approval of Justin J McShane, Esquire and will only be screened for appropriate taste.
- The winner will be announced Sunday night.
- A winner may only repeat two times in a row, then will have to sit out a week to be eligible again. This person, who was the two time in a row winner, may answer the question, but will be disqualified from the honor so as to allow others to participate.
- This is for learning and for fun. EVERYONE IS ENCOURAGED TO TRY TO ANSWER THE WEEKLY QUESTION. So give it a shot.
Here it is:
The www.TheTruthAboutForensicScience.com “Forensic Science Geek of the Week” challenge question. Remember the first full and complete answer wins the honor and also gets his/her photo displayed, bragging rights for the week and finally website promotion.
OFFICIAL QUESTION:
- 1. What is pictured here?
2. What forensic discipline is this piece of equipment used in?
3. How does it work?
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Robert Lantz, Ph.D. says:
This is a detector from an Agilent or HP GC. It appears to be a Flame Ionization Detector (FID), possibly from a 6890 GC. The part next to the detector body is the flame tip.
A FID works by impinging a voltage between the flame tip and the detector body. As (typically) organics are burned in the flame, the number of ions increases, resulting in a decreased resistance and increased current. The current is then converted in the electrometer section and digitized.
The digitized signal then goes to the computer where it is used to calculate the correlation between signal and analyte concentration.
It works well for anything that is sufficiently volatile to go through the gas chromatograph.