Standard solutions Mean (n=6) RE (%) Acceptance criteria
Propofol 0.005 0.0059 18.03 <20%
0.5 0.5118 2.36 <15%
1 1.0099 0.99
5 5.5973 11.9
10 10.6835 6.84
50 50.8894 1.78
100 100.4091 0.41
Non-conjugated metabolites 0.005 0.0052 4.86 <20%
0.1 0.1095 9.53 <15%
0.5 0.5101 2.20
1 1.0461 4.61
5 5.1012 2.02
10 10.0772 0.77
50 51.1131 2.23
RE- relative error
Table 3: Back-calculated concentration of standard solution using calibration equation for propofol and non-conjugated metabolites.