Have you followed the recommended storage conditions and other precautions that may have accompanied the standard? Yes No If no, please describe the storage conditions.
If you have diluted the standard, what solvents did you use used and what steps did you folllow to get your final concentration?
If available, please fax a chromatogram of the mix in question to our Bellefonte location (Fax # 814-355-2895) so we can evaluate it for response, breakdown, etc.
An Analytical Reference Materials Department Representative will respond with a resolution to your concern within 48 hours.