Homogeneity test Ketamine Pethidine Cocaine Methandone Diazepam Estazolam Heroin Morphine Methamphetamine Between-bottle(%, S1) 99.92±0.012 99.42±0.006 99.62±0.006 99.87±0.008 99.94±0.004 99.44±0.003 99.62±0.006 99.61±0.008 99.98±0.002 within-bottle(%, S1) 99.92±0.012 99.42±0.006 99.62±0.006 99.87±0.007 99.94±0.004 99.44±0.003 99.62±0.006 99.61±0.008 99.98±0.002 F-test 1.00 1.11 1.04 1.16 1.07 1.81 1.04 1.40 1.93 F0.05(n,m) 3.38 3.96 3.96 3.96 3.96 3.96 3.96 3.96 3.96 F<F0.05 Y Y Y Y Y Y Y Y Y t-test 0.094 0.065 0.0267 0.03 0.107 0.051 0.253 0.27 0.004 2.025 0.269 0.262 0.34 0.193 0.129 0.261 0.34 0.074 t≤tα Y Y Y Y Y Y Y Y Y

Table 5: Results for the contents, the within-bottle, and between-bottle and homogeneity test of 9 illicit drugs.