PCB's internal standard
Posted: Thu Jun 25, 2009 11:12 pm
Hi,
I am using the internal standard TCMX for my PCB analysis.
I am using DCBP as a surrogate,
TCMX comes out early in the run (12 min), I have no problems with any early aroclor's or mid aroclors by correcting using internal standard. However towards the end of the run there is an increase in response from the later aroclors 1254, 1260 (35-45min), I believe this is becasue there is no internal standrd toward the end of the run.
Can anyone suggest a second internal standard i could use?
Cheers
I am using the internal standard TCMX for my PCB analysis.
I am using DCBP as a surrogate,
TCMX comes out early in the run (12 min), I have no problems with any early aroclor's or mid aroclors by correcting using internal standard. However towards the end of the run there is an increase in response from the later aroclors 1254, 1260 (35-45min), I believe this is becasue there is no internal standrd toward the end of the run.
Can anyone suggest a second internal standard i could use?
Cheers