Could We Really Use Aloe vera Food Supplements to Treat Diabetes? Quality Control Issues

Figure 7

Standard GC chromatograms of methanol. From top to bottom are 0.5, 0.25, 0.125, 0.0625, 0.03125, 0.015625, 0.007813, and 0.003906% methanol concentrations. The inset shows the calibration curve constructed from the data.