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. 2023 Jun 7;12(6):1231. doi: 10.3390/antiox12061231

Figure 1.

Figure 1

Evolution of free acidity, peroxide value (PV), K232, and K270 of non-filtered (NF-HO, (a)) and filtered (F-HO, (b)) cold-pressed hempseed oil during 12 weeks of storage in transparent glass bottles. Data are expressed as the mean ± sd of n = 3 oil bottles, each analyzed in triplicate. a–d: different superscript letters in the same line indicate significantly different values for a given parameter (p < 0.05 by post hoc Tukey’s HSD test); the same superscript letters in the same line indicate not significantly different values (p > 0.05 by post hoc Tukey’s HSD test). Figure (c) illustrates the free acidity, PV, K232, and K270 of total NF-HO and F-HO samples. Data are expressed as the mean ± sd of n = 12 oil bottles, each analyzed in triplicate. In each box, “×” indicates the average value. In the comparison between NF-HO and F-HO samples, “*” indicates significantly different values (p < 0.05 by Student’s t-test) for a given parameter; conversely, the absence of “*” indicates non-significantly different values (p > 0.05 by Student’s t-test).