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- Posts: 1
- Joined: Fri Aug 17, 2018 8:34 pm
I'm doing the residual benzene method verification, benzene std is 2 ppm, prepared only with water. The problem is the %rsd of the pear area in benzene std, it always over 15%, especially for the bracket std, the peak area always drop a lot. (etc. from 1.3 to 0.6) This situation happened every day.
Here is my method condition:
HS Injection volume: 1mL
Oven Temp: 80°C
Loop Temp:100°C
Transfer Line Temp:110°C
Vial Equilibration Time:40 minutes
Shaker:High
GC-FID:
5.0 mL/min (Constant flow)
Injector Mode: Split1:1
Injector Temperature:280°C
I'm using the split liner without wool, 4 mm x 6.3 mm x 78.5 mm
column: DB-624 30M*053MM, 3.0UM
It's a method verification, so I can't change the std and sample preparation.
Is anyone met the same problem?I'm fresh in GC analysis, please advise me how to resolve this problem.
Thanks so much !