Page 1 of 1

Load GC-FID Standby Method After Sequence Completes

Posted: Fri Mar 29, 2013 3:29 am
by kvircks
I am using Agilent ChemStation (E.02.01.1177); however, I can't figure out how to load a method for standby purposes after my sequence finishes. After my sequence finishes, I would like to turn off the flame and slow the column flow. I know how to create a method with all these parameters. Is there a way I can tell the instrument to load the Standby method upon sequence completion? My first thought was to just create an injection that utilizes the standby method (possibly injecting air). Our lab uses barcodes that are read before injection. After the injection, the method would just revert to the initial method parameters.

Is there a keyword or command that can be placed at the end of the sequence table to simply load the method and avoid an injection altogether?

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Fri Mar 29, 2013 2:47 pm
by GasMan
You could try this.
After the last sample vial in your sequence table, enter a line without a vial number but using your standby method. This will then load your standby method and start a 'blank run'.

Gasman

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Fri Mar 29, 2013 2:56 pm
by kvircks
I was wondering if something like that would work. I will give it a try on Monday. Thanks!

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Fri Mar 29, 2013 2:59 pm
by Consumer Products Guy
I was wondering if something like that would work. I will give it a try on Monday. Thanks!
Yes, it will work, either for GC or for HPLC; we have done this for over 20 years.

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Fri Mar 29, 2013 4:23 pm
by dblux_
Yes, it will work, either for GC or for HPLC; we have done this for over 20 years.
Are you sure ? :o

This is MSD ChemStation. :!:

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Fri Mar 29, 2013 6:20 pm
by Consumer Products Guy
Make a new method where the gas flows are where you want them.

Enter that as the last line in your sequence table.

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Fri Mar 29, 2013 7:01 pm
by dblux_
Make a new method where the gas flows are where you want them.

Enter that as the last line in your sequence table.
Not that simple :roll: , the question was:

"Is there a keyword or command that can be placed at the end of the sequence table to simply load the method and avoid an injection altogether?"

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Thu Apr 04, 2013 3:33 am
by kvircks
Turns out ChemStation will not allow me to leave vial locations blank or set to 0 in the sequence. I receive an out of range error. Returning to my previous question, is there a way at the end of the sequence to simply have a method load and not run? Like I said, all I want the method implementation to do is shut off the FID flames and slow the column flowrates down. Any thoughts?

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Thu Apr 04, 2013 6:47 am
by dblux_
Turns out ChemStation will not allow me to leave vial locations blank or set to 0 in the sequence. I receive an out of range error.
Not true. Only MSD ChemStation doesn't allow empty vial location field in sequence table.
Returning to my previous question, is there a way at the end of the sequence to simply have a method load and not run? Like I said, all I want the method implementation to do is shut off the FID flames and slow the column flowrates down. Any thoughts?
Yes. Two ways for your purpose.

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Thu Apr 04, 2013 1:54 pm
by AICMM
Three comments. One, why not just make an injection with the "rest" method of something relatively innocuous like hexane or pentane? Two, why not put a vial number in the table and not put a vial there? You will get an error message when it cannot pick up the vial but so what. Three, if I am not mistaken, MSD Chemstation used to revert to the top level method when it was done with the sequence. If that is still the case (it's been a while) make the top method the "rest" method and the correct method throughout the sequence.

Best regards,

AICMM

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Thu Apr 04, 2013 10:12 pm
by kvircks
Three comments. One, why not just make an injection with the "rest" method of something relatively innocuous like hexane or pentane? Two, why not put a vial number in the table and not put a vial there? You will get an error message when it cannot pick up the vial but so what. Three, if I am not mistaken, MSD Chemstation used to revert to the top level method when it was done with the sequence. If that is still the case (it's been a while) make the top method the "rest" method and the correct method throughout the sequence.

Best regards,

AICMM
Thanks for the input. I did have the same idea as far as a blank injection goes. Any method that involves an injection would do they trick. I know plenty of tricks to get the method to implement. However, I was wondering if there is a "true" way of accomplishing what I am asking, which is simply loading a method by some sort of command.

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Fri Apr 05, 2013 10:42 am
by dblux_
The command is: GCMethodLoad "full path and method file name"

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Fri Apr 05, 2013 2:20 pm
by Yama001
If make sure your standby method is loaded when you start your sequence, it will be reloaded after your analytical sequence is finished. No need to put it in your sequence table.

Re: Load GC-FID Standby Method After Sequence Completes

Posted: Thu May 16, 2013 1:55 am
by sllimbri65
yes, the last method you load manually before you start your run, will load when the run is complete.