Currently, the mass calibration and peak data in the peaktable have been done. However, the PTR-viewer still doesn't provide the final concentration. Thank you!
Please use matrix-adapted standard VOC mixtures to conduct calibrations under your optimised instrumental setup. You may use a Liquid Calibration Unit (LCU) or even do it manually in order to get the curves for ppbV/pptV vs. cps (counts). Best regards!
Your screenshot doesn't show if the table contains the primary ion (usually based on m21.022 if you are using H3O+). This will be necessary to calculate the concentration.