Characteristics of Flaxseed Oil from Two Different Flax Plants

Figures & data

Table 1 Fatty acid composition of FFS and OFS oils.*

Fatty acid	FFS	OFS
Palmitic (C16:0)	8.77 ± 0.08	5.34 ± 0.01
Stearic (C18:0)	6.78 ± 0.16	3.18 ± 0.41
Oleic (C18:1)	20.79 ± 0.09	16.61 ± 0.22
Linoleic (C 18:2)	15.37 ± 0.17	16.06 ± 0.12
Linolenic (C 18:3)	47.37 ± 0.16	58.03 ± 0.09
Other	0.92 ± 0.66	0.79 ± 0.02
SFA	15.55 ± 0.23	8.52 ± 0.40
USFA	83.53 ± 0.42	90.70 ± 0.42
n-3/n-6 ratio	3.08 ± 0.02	3.61 ± 0.02
*All the given values are means of three determinations ± standard deviation.
SFA: saturated fatty acids; USFA: unsaturated fatty acids.

Figure 1 Ultraviolet/visible spectra of the FFS and OFS oils. Figure derived from scans (λ = 200–290) of oil diluted 1:800; from scans (λ = 290–400) of oil diluted 1:100; and from scans (λ = 400–800) of oil diluted 1:10, all in hexane.

Table 2 Physicochemical characteristics of FFS and OFS oils.*

Index	FFS	OFS
Acid value (mg KOH/g)	1.17 ± 0.01	0.68 ± 0.02
Iodine value (g of I2/100 g of oil)	179.93 ± 0.54	195.03 ± 1.16
Peroxide value (meq/kg)	1.96 ± 0.18	1.59 ± 0.05
Total polyphenol (as mg gallic acid/kg of oil)	76.33 ± 6.51	114.67 ± 14.29
Chlorophyll (mg/kg)	0.59 ± 0.03	0.39 ± 0.03
Refractive index (at 20°C)	1.4791 ± 0.0002	1.4805 ± 0.0
Density (g/cm^3)	0.9280 ± 0.0015	0.9349 ± 0.0024
*All the given values are means of three determinations ± standard deviation.

Figure 2 Thermogravimetric curves and corresponding derivative curves of the FFS and OFS oils. The inset shows the detailed section of the thermogravimetric curves at temperatures between 120 and 240°C (color figure available online).

Figure 3 Melting thermograms for the FFS and OFS oils.

Figure 4 The apparent viscosities of the FFS and OFS oils at various temperatures. The symbols represent the measured values and the solid lines represent the predicted values using Eq. (3).

Figure 5 Arrhenius plots (ln (K) against (1/T)) for the FFS and OFS oils.