Concentration effect of OOE in stripped FO
Table 3 shows PV, CDV and p -AV of FO samples with 0.05, 0.1 and 0.2% OOE after 10 days at 25 ℃ and after 5 days at 40 ℃. At 25 ℃, PV, CDV and p -AV of FO slightly lowered by increasing concentration of OOE from 0.05% to 0.2%. At 40 ℃, PV did not show the differences between OOE concentrations. This is because that PV of FO samples increased so quickly at 40 ℃ and FO samples with 0.05-0.2% OOE might have already reached the peak PV in 2 days as shown in Figure 4. CDV decreased from 10.19 ± 0.24 mmol/L to 8.43 ± 0.14 mmol/L as OOE concentration increased from 0.05% to 0.2%. p -AV of FO with 0.2% OOE was significantly lower (16.23 ± 0.08) than that with 0.05% OOE (36.77 ± 0.70). Overall results in Table 3 indicate that, unlike in SBO, the protection effect of FO can be improved by increasing concentration of OOE from 0.05% to 0.2%.