Table 5. Oil Recovery Results Obtained in the Synthetic Samples Prepared with the P52 oil after Determination of TOG Content Using the ASTM D 8193 Method with Quantification Done Using the Calibration Curve Prepared with Oily Water Synthetic Standards.

replicas	oil recovery (%)	average recovery (%)	coefficient of variation (n = 5) (%)
1	107.7
2	108.5
3	100.6	105.2	4.0
4	108.5
5	100.6