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A blog on the latest applications, articles, & research on chromatography solutions in sample preparation, Ion Chromatography (IC),
High Pressure Liquid Chromatography (HPLC), Ion Chromatography-Mass Spectrometry (IC-MS), Gas Chromatography (GC),
Gas Chromatography-Mass Spectrometry (GC-MS and GC-MS/MS), and software (Chromeleon CDS, LIMS, and ProteinCenter).

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Gas Chromatography: Troubleshooting WallChart!

  
  
  
  
  
  

GC Troubleshooting WallChart Icon 200 200What do you do when you run into gas chromatography (GC) problems? Refer to this complimentary poster for troubleshooting! Supplies are limited so get your wallchart today by clicking the image on the right and filling out a brief form so that the wallchart can be mailed to you.

Here is a brief list of the troubleshooting areas covered in this wallchart. (For solutions, you will need the wallchart!)

A really useful feature of the wallchart is that it graphically displays the problem so you can match your problem to the possible cause in one glance!

Baseline Problems Without Injections

Here, possible causes and solutions to high noise, spiking, long-term fluctuations, square waves, continually rising or falling baselines, and s-shaped baselines are listed.

Detector Problems with Injection

This section lists detector problems such as no peaks, no peaks or dips after the solvent peak, some or all negative peaks, peaks clipped at the bottom or the top.

Column or Inlet Problems

For column or inlet problems, the symptoms depicted and discussed include broad ghost peaks, tailing or fronting peaks, tailing solvent peaks, rapidly broadening peaks, chair-shaped peaks, and double peaks.

Problems with Results

Here, the wallchart lists decreasing and increasing retention times, unreproducible retention times, and unreproducible results.

Let us know if this wallchart is helpful in your work in the Comments box below. Also, let us know troubleshooting areas not covered in the wallchart. Our experts will be pleased to answer your questions.

Comments

i really do appericiate this!
Posted @ Wednesday, August 29, 2012 3:31 PM by sami berk ozden
Hi Sam:  
 
Thank you for visiting our blog and your comment. Much appreciated. 
 
Sonya
Posted @ Wednesday, August 29, 2012 3:34 PM by Sonya Pelia
Thank you very much!
Posted @ Wednesday, August 29, 2012 3:34 PM by Justice
Hi, 
I requested these troubleshooting charts but I have not received them. Not sure what happened, I reapplied today. Would appreciate some feedback. Thanks
Posted @ Thursday, September 06, 2012 1:46 PM by L Singh
Hi Mr. Singh,  
 
They should on the way as per your original request. I just checked with our collateral agency. Are you in the US or another country?  
 
My apologies for the inconvenience that you had to refill the form.  
 
Best regards 
 
Sonya
Posted @ Thursday, September 06, 2012 4:49 PM by Sonya Pelia
Hi 
I have problem with GC, when I inject diffrent concentration of standards to GC (injector 1177,detector FID) the area of picks donot changes. 
please guide me. 
Posted @ Sunday, January 20, 2013 2:33 AM by hamed harrafi
Hi Hamed: 
I have forwarded your question to one of our GC specialists and he will provide an answer very soon. 
 
Thanks for visiting the blog and contacting us. 
 
Best regards 
 
Sonya
Posted @ Monday, January 21, 2013 11:20 AM by Sonya Pelia
Hamed,  
 
I will need some more information about your system, I will send you an email directly. 
 
In the mean time there are a few things to consider.  
1. Check the syringe, make sure you are injecting the amount you think you are. 
2. Check for leaks, especially in the inlet. These can be hard to find and can cause strange results. 
3. Make sure the jet is not cracked (depending on the material) and that the column is seated to the recommended distance into the base. 
4. Check the H2 and Air flows, making sure they are at the right flow rates to maintain a good flame. 
5. Make sure the detector temperature is stable. 
 
Again, I will send you an email directly to help with more specifics for your system. 
 
Eric 
Posted @ Monday, January 21, 2013 11:34 AM by Eric Phillips
Hi 
I have a problem with GC for analysis of algal fatty acid. when i inject my picks is very higher than base line and picks are very small. 
column: BPX70,FID 
please guidance me how can i fix this problem. I test some method but i dont have any result. 
Best regards
Posted @ Monday, March 03, 2014 9:36 AM by salim
Hi Salim 
 
Thanks for visiting our blog and your question. I have forwarded your question to a GC expert and will post the answer as soon I hear back. 
 
best regards 
 
Sonya
Posted @ Monday, March 03, 2014 10:15 AM by Sonya Pelia
Thanks for your blog and a time you spend
Posted @ Monday, March 03, 2014 10:46 AM by salim
Ordered GC Troubleshooting poster - which I really like - for my coworkers in the lab... Never received it. Never received any confirmation or response as well. Reapplying today again, otherwise will order from competitors.
Posted @ Sunday, April 13, 2014 8:57 PM by Peter
Hi Peter,  
 
Apologies for the poster not making it to you; as mentioned in my direct email to you, we have ordered more posters as we ran out. But, the marketing communications specialist will put one in the mail for you from her stock. 
 
Again, our apologies for the inconvenience. 
 
best regards 
 
Sonya
Posted @ Monday, April 14, 2014 1:44 PM by Sonya Pelia
Thanks, this will be useful for the lab.
Posted @ Wednesday, June 25, 2014 9:32 AM by baby
Hi Debra, 
 
You are welcome! Let us know if you are looking for something else. 
 
best regards 
 
Sonya
Posted @ Wednesday, June 25, 2014 10:44 AM by Sonya Pelia
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