Table 1: Given and measured propofol amounts of Tenax sorbent tubes. The column “target” shows the desired concentration per tube. The column “weighed” shows the calculated amounts of propofol per tube and “measured” shows the actual measured amount. The columns measured-weighed and Δmeasured-reference displays the percentual difference of the columns, with reference to the measured mass.

liquid
referencesamples stored at 4°Csamples stored at 22°Cmailed samples
targetweighedmeasuredΔmeasured- weighedweighedmeasuredΔmeasured-weighedweighedmeasuredΔmeasured-weighedweighedmeasuredΔmeasured-weighed
ngngng%ngng%ngng%ngng%

109.88.6-14.08.68.3-3.69.69.60.09.59.72.1
2018.517.3-6.915.515.71.318.217.2-5.818.116.2-11.7
5047.844.3-7.938.340.45.245.543.1-5.646.535.2-32.1
10096.492.5-4.285.687.21.895.491.7-4.095.481.6-16.9

mean-8.31.2-3.9-14.7

gaseous
referencesamples stored at 4°Csamples stored at 22°Cmailed samples
targetmeasuredmeasuredΔmeasured- referencemeasuredΔmeasured- referencemeasuredΔmeasured- reference
ngngng%ng%ng%

2022.629.631.018.6-17.726.517.3
4045.354.119.437.2-17.948.06.0
6065.387.634.266.11.268.84.1
8081.0122.050.676.2-5.9106.030.9
100114.3157.738.0115.20.8112.3-1.7

34.6-7.911.3