Toxaphene analysis questions...

[chemwipe]

Hello people-

Anyone who runs pesticides here? I was wondering if anybody else has a problem with their second source verification for Toxaphene (ICV) passing within 30%. Calibration is no problem, but the ICV is really out of the acceptable limits. I'm running a sample for certification.

I've been told before that it's very difficult to get a second source for Toxaphene.

Is this true?

[vballchemist]

We usually have no issues with Toxaphene. We purchase standard solutions from both AccuStandard and UltraScientific and meet ICV requirements. We also integrate total peaks along baseline instead of individual peaks.

[chemwipe]

We also integrate total peaks along baseline instead of individual peaks.

Okay, that may be my problem...I integrate using 4 individual peaks.