Internal Standards for Pesticide Analysis
Posted: Tue Jun 14, 2011 8:35 am
Dear All,
I have already run OP and OC standards calibration. I did not use any internal standards.
Just diluted stock standards and run by GC-PFPD and GC -ECD.
Now I want to run my soil and rice samples.
I have internal standards PCB 8 and PCB 138 from Dr.Ehrenstorfer.
These PCB internal standards, can I use for my Organophosphate (OP) and Organochlorine (OC) analysis by GC/PFPD and GC/ECD?
I am confusing a lot. (eg. when I analyze nitrofuran metabolite AOZ, at that time I used internal standard AOZ )
But now PCB 8 and PCB 138 internal standards are represent as internal standards of OP and OC??)
Do I need to use internal standards?
If I want to use in my samples , I need to use in calibration standard curve also?
Please kindly suggest me.
I have already run OP and OC standards calibration. I did not use any internal standards.
Just diluted stock standards and run by GC-PFPD and GC -ECD.
Now I want to run my soil and rice samples.
I have internal standards PCB 8 and PCB 138 from Dr.Ehrenstorfer.
These PCB internal standards, can I use for my Organophosphate (OP) and Organochlorine (OC) analysis by GC/PFPD and GC/ECD?
I am confusing a lot. (eg. when I analyze nitrofuran metabolite AOZ, at that time I used internal standard AOZ )
But now PCB 8 and PCB 138 internal standards are represent as internal standards of OP and OC??)
Do I need to use internal standards?
If I want to use in my samples , I need to use in calibration standard curve also?
Please kindly suggest me.