Support FAQs
Answers to your frequently asked questions
Some of the most commonly asked questions.
How do I convert ppm to mg/m3 and ppb to µg/m3?
What is the cause of poor reproducibility for liquid-loaded standards?
How do I convert peak areas into toluene equivalents?
How can I prevent high air/water background when using a thermal desorber with GC–MS analysis?
What is the baseline step near the beginning of my GC–MS run?
How do I calculate a split ratio?
How do I avoid water saturation when carrying out large-volume sampling of humid air?
What is the cause of extra peaks in my blanks/samples?
What difference does sorbent mesh size make?
What causes poor chromatogram peak shape when using thermal desorption?
How do I calibrate my analytical system to quantify an analyte collected on a sorbent tube?
For help with any other questions, please contact us on support@markes.com
