TABLE 2

Well Counter Reproducibility for Simulated (Flumazenil) HPLC Metabolite Curves (55 Repeated Measurements)

High activityLow activity
Total activityMean = 61,968 cpmMean = 1,462 cpm
SD = 267 cpm (COV = 0.4%)SD = 73 cpm (COV = 5.0%)
Peak 14 tubes5 tubes
Mean = 10,981 cpmMean = 477 cpm
SD = 85 cpm (COV = 0.8%)SD = 25 cpm (COV = 5.2%)
Peak 210 tubes7 tubes
Mean = 4,435 cpmMean = 599 cpm
SD = 74.9 cpm (COV = 1.7%)SD = 32 cpm (COV = 5.3%)
Peak 311 tubes7 tubes
Mean = 46,565 cpmMean = 381.6 cpm
SD = 238 cpm (COV = 0.5%)SD = 36 cpm (COV = 9.4%)