3.4. Analysis of Yaba samples
Five seized Yaba samples were extracted and analyzed using
GC-FID (Fig. 7). The GC-FID was calibrated and demonstrated good
linearity in the range of 0.0025–1.0 mg mL1 of methamphetamine
in methanol (y = 408.85x 2.78; R2 = 0.9996; %RSD < 4.4). The
results displayed in Table 2, clearly demonstrated a very good
correlation between the accurately determined concentration of
methamphetamine in the samples using GC-FID and the real-time
mobile quantitative method. This also indicated that the color tests