RESULTS

Figure 3.5.1 Chromatogram at the target concentration.

*Peak areas measured by integrator or other suitable means

Figure 3.6.2 Mass spectra of propylene glycol.

GC-mass spectrometer is used to confirm the identity and purity of analyte peak.

Calibration curve made from 4 standards of different concentrations bracketing the samples.
Concentration of samples can be obtained from the calibration curve.