Quality of Canadian non-food grade soybeans 2014

Fatty acid composition and free fatty acid content

Fatty acid composition

Ontario composites of the top 2 grades showed some differences in their fatty acid profiles. For Soybean, No. 1 Canada, the linoleic value was 54.0%, the alpha-linolenic value was 8.8%, and iodine value was 135 units. For Soybean, No. 2 Canada, the linoleic value was 54.2%, the alpha-linolenic value was 9.4%, and iodine value was 137 units.

For the Quebec composite of Soybean, No. 1 Canada, the linoleic value was 54.2%, the alpha-linolenic value was 9.0%, and iodine value was 136 units. For Soybean, No. 2 Canada, the linoleic value was 54.9%, the alpha-linolenic value was 9.4%, and iodine value was 137 units.  

Manitoba composites of the top 2 grades showed slight differences in their fatty acid profiles. For Soybean, No. 1 Canada, the linoleic value was 56.6%, the alpha-linolenic value was 10.9%, and iodine value was 141 units. For Soybean, No. 2 Canada, the linoleic value was 56.2%, the alpha-linolenic value was 10.2%, and iodine value was 140 units.

Variety selection, soil fertility and environmental growing conditions also contributed to the difference in the fatty acid composition between provinces.

Free fatty acid content

Grade composites showed free fatty acid levels averaging 0.15% for Soybean, No. 1 Canada and 0.16% for Soybean, No. 2 Canada. Higher free fatty acid values are mainly due to seed damage, which results from exposure to moisture and oxygen, wet harvesting conditions and improper storage.

Fatty acid composition and Free fatty acid content of non-food grade soybean grade composites, 2014 Harvest Sample Program
ProvinceFootnote 1 No. of samples Fatty acid compositionFootnote 2 Iodine valueFootnote 3 Free fatty acids, %
C16:0 C18:0 C18:1 C18:2 C18:3
Soybean, No. 1 Canada
Manitoba 1 10.8 3.2 17.1 56.6 10.9 141 0.15
Ontario 53 10.4 3.7 21.7 54.0 8.8 135 0.15
Québec 1 10.4 3.7 21.3 54.2 9.0 136 0.29
All provincesFootnote 4 55 10.5 3.7 21.6 54.0 8.8 135 0.15
Soybean, No. 2 Canada
Manitoba 71 10.3 3.7 18.0 56.2 10.2 140 0.12
Saskatchewan 18 10.3 3.8 16.5 56.3 11.6 142 0.28
Ontario 159 10.4 3.7 20.8 54.2 9.4 137 0.18
Quebec 25 10.2 4.0 20.0 54.9 9.4 137 0.12
New Brunswick 4 10.1 3.7 19.1 55.4 10.0 139 0.27
PEI 3 10.8 3.7 18.3 56.5 9.2 138 0.16
All provincesFootnote 4 280 10.4 3.7 19.7 54.0 9.1 135 0.16

Footnotes

Footnote 1

As designated on the sample envelope

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Footnote 2

Percentage of total fatty acids including palmitic (C16:0), stearic (C18:0), oleic (C18:1), linoleic (C18:2), and linolenic (C18:3); other minor fatty acids totaled 1.4% to 2.0%

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Footnote 3

Calculated from the fatty acid composition

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Footnote 4

Weighted averages

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