Page 1 of 1
Headspace syringe
Posted: Tue Aug 27, 2013 11:22 am
by Irina
Hi everyone,
How can I check a headspace syringe? How can I be sure that gas will not evaporate between plunger and syringe wall?
Re: Headspace syringe
Posted: Tue Aug 27, 2013 11:43 am
by LCbob
Hi
I assume you mean the volatiles escaping via the syringe plunger tip.
What equipment do you have? If in doubt replace it and run some qualification tests.
Re: Headspace syringe
Posted: Tue Aug 27, 2013 12:30 pm
by Irina
Hi LCbob,
I have a GC-ECD 2010 from Shimadzu with AOC-5000. I replaced the syringe because it was dirty and I was wondering if I can reuse this one after washing it and how can I check if the volatiles are escaping.
Qualification tests means to do an injection of a known concentration standard and check it on calibration curve?
Irina
Re: Headspace syringe
Posted: Thu Aug 29, 2013 7:58 am
by Peter Apps
Hi Irina
Pull back the syringe plunger, stick the end of the needle into an old inlet septum or headspace septum so that the tip is sealed. Push on the plunger - if the syringe is leaking the plunger will move down.
Peter
Re: Headspace syringe
Posted: Thu Aug 29, 2013 8:43 am
by Irina
Thank you Peter