Calibrating group peaks

[S. G. Joshua]

I have an analyte with four peaks (Dipropylene glycol). The calibrated amount is reporting as a different amount for each peak instead of the group. How can I correct?

[chromatographer1]

Use your integration software to sum the four peaks and report it as one peak.

Not knowing if you have any other peaks within the time span of the four or what brand of software you have (if it isn't the same as mine I cannot help you) there is not much else to say.

Good luck,

Rod

[Consumer Products Guy]

Here we do as Rod states, use summation and then have "one peak" for the datastation to easy use for calibration. This is especially useful if your DPG standard is from a different lot or supplier, as the peak ratios vary. Most times we trimethlsilylate the DPG and use nonpolar capillary, but have done "as-is" on polar capillary too.