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Table 5 Physicochemical properties of Thlaspi arvense L. seed oil from five provenances

From: Analyses of the oil content, fatty acid composition, and antioxidant activity in seeds of Thlaspi arvense L. from different provenances and correlations with environmental factors

Physicochemical properties

Zhuanghe city

Bin county

Beian city

Kedong county

Panshi city

Iodine value (g iodine/100 g fat)

79.19 ± 7.03c

99.09 ± 0.80a

90.84 ± 2.02ab

83.23 ± 4.09bc

97.28 ± 4.41a

Saponification value (mg KOH/g)

193.52 ± 0.81ab

199.60 ± 2.14a

189.32 ± 3.24b

187.68 ± 4.67b

186.51 ± 5.67b

Peroxide value (mEq/kg)

10.60 ± 1.69a

0.13 ± 0.03 cd

0.07 ± 0.05d

1.63 ± 0.08c

4.03 ± 0.13b

Acid value (mg KOH/g)

13.02 ± 1.52a

3.33 ± 0.34b

0.97 ± 0.07c

2.24 ± 0.22bc

2.21 ± 0.07bc

Colour

     

L*

78.09 ± 4.32ab

66.53 ± 3.75c

78.78 ± 1.48a

67.76 ± 4.08c

71.79 ± 0.80bc

a*

7.61 ± 0.27c

8.47 ± 0.90b

4.51 ± 0.06e

10.29 ± 0.11a

6.07 ± 0.07d

b*

121.35 ± 5.97a

105.68 ± 4.81c

119.25 ± 1.78ab

111.10 ± 6.04bc

111.84 ± 0.91bc

  1. L*, a*, b* are the chroma values representing the colour of the oil. The L* value is a measure of brightness, which ranges from 0 (black) to + 100 (white), the a* ranges from (−) green to (+) red, and the b* value ranges from (−) blue to (+) yellow. The value is expressed as the average (±) standard error of three determinations. Different lowercase letters indicate significant differences at the 5% probability level