Cyberlipid

 

 

Positional distribution of major fatty acids in triglycerides
 of some plant oils

 

  sn 16:0 16:1 18:0 18:1 18:2 18:3 20:0 20:1 22:0 22:1 24:0
Linseed 1
2
3
10.1
1.6
6.0
0.2
0.1
0.3
5.6
0.7
4.0
15.3
16.3
17.0
15.6
21.3
13.2
53.2
59.8
59.4
         
Soya bean 1
2
3
18.2
1.9
12.0
0.1
0 .1
0.1
5.4
2.7
4. 5
15.9
28.4
25.0
47.8
64.1
48.3
12.9
2.6
10.3
         
Maize 1
2
3
17.9
2.3
13.5
0.3
0.1
0.1
3.2
0.2
2.8
27.5
26.5
30.6
49.8
70.3
51.6
1.2
0.7
1.0
         
Peanut 1
2
3
13.6
1.6
11.0
0.3
0.1
0.3
4.6
0.3
5.1
59.2
58.5
57.3
18.5
38.6
10.0
 

0.7

4.0

1.1
0.3
2.7
1.3
0.2
5.7
  0.7
0.5
2.8
Sunflower 1
2
3
10.9
1.7
9.0
0.6
0.0
0.5
1.9
4.1
8.7
17.1
36.3
31.2
70
57.8
51.3
           
Olive 1
2
3
13.1
1.4
16.9
0.9
0.7
0.8

2.6

4.2

71.8
82.9
73.9
9.8
14.0
5.1
0.6
0.8
1.3
         

Rapeseed
1
2
3
4.1
0.6
4.3
0.3
0.2
0.3

2.2

3.0

23.1
37.3
16.6
11.1
36.1
4.0
6.4
20.3
2.6
  16.4
2.0
17.3

1.4

1.2

34.9
3.6
51.0
 

Palm oil
1
2
3
60
13
72
  3
0
8
27
68
14
9
18
3
           
Cocoa
butter
1
2
3
34
2
37
  50
2
53
12
87
9
1
9
0
           

 

The fatty acid profile (in mole%) is given for the three acyl positions of the molecule (1, 2 and 3).

It can be seen that the saturated fatty acids are more abundant at the sn-1 and 3 positions and unsaturated ones at the sn-2 position (except for 18:3 in soya bean). Among monoenes, 18:1 is regularly distributed but 22:1 (erucic acid) and 20:1 are clearly more abundant at the external positions.

 

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