Certified refernece materials
Posted: Tue Oct 26, 2010 1:44 pm
Hi all,
Has anyone worked with certified refernce material Nist 1941B.
I have extracted the sample using ASE , concentrated using a gentle stream of nitrogen and injected onto a GC/MS. I am get over-recoveries(150-200 percent. I am certain this is not acceptable.
If any one has any advice etc. I would apprecitae it.
Thanks
R.
Has anyone worked with certified refernce material Nist 1941B.
I have extracted the sample using ASE , concentrated using a gentle stream of nitrogen and injected onto a GC/MS. I am get over-recoveries(150-200 percent. I am certain this is not acceptable.
If any one has any advice etc. I would apprecitae it.
Thanks
R.