GB 1352-2023Soya bean (English PDF)

Foreword

This document was drafted in accordance with the provisions of GB/T 1.1-2020 "Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents".

This document replaces GB 1352-2009 "Soya bean". Compared with GB 1352-2009, the main technical changes are as follows.

- MODIFY the scope of application of the standard;

- MODIFY the definitions of sound kernel, high-oil soya bean, and high-protein soya bean;

- MODIFY the requirements for percent of damaged kernel;

- MODIFY the quality indicators of high-protein soya beans;

- ADD the out-of-grade of soya beans.

1 Scope

This document specifies the terms and definitions, categories, quality requirements, inspection methods, inspection rules, labeling, packaging, storage, and transportation requirements for soya beans.

This document applies to the acquisition, storage, transportation, processing, and sale of commercial soya beans.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 191 Packaging - Pictorial marking for handling of goods

GB 5009.3 National food safety standard - Determination of moisture in food

GB 5009.5 National food safety standard - Determination of protein in food

GB 5009.6-2016 National food safety standard - Determination of fat in food

GB/T 5490 Inspection of grain and oils - General rules

GB/T 5491 Inspection of grain and oilseeds - Methods for sampling and sample reduction

GB/T 5492 Inspection of grain and oils - Identification of colour, odour and taste of grain and oilseeds

GB/T 5493 Inspection of grain and oils - Determination of type purity and their mixture

GB/T 5494 Inspection of grain and oils - Determination of foreign matter and unsound kernels of grain and oilseeds

3 Terms and definitions

For the purpose of this document, the following terms and definitions apply.

4 Categories

Soya beans can be divided into the following categories according to the color of seed coat:

a) Yellow soya beans: soya beans of which the seed coat is yellow or light yellow, the hilum color is yellowish brown, light brown, or dark brown, and the kernel content is not less than 95 %.

b) Green soya beans: soya beans of which the seed coat is green and the kernel content is not less than 95 %. According to the color of its cotyledons, it is divided into two types: green-coat green-cotyledon soya beans and green-coat yellow-cotyledon soya beans.

c) Black soya beans: soya beans of which the seed coat is black and the kernel content is not less than 95 %. According to the color of its cotyledons, it is divided into two types: black-coat green-cotyledon soya beans and black-coat yellow-cotyledon soya beans.

5 Quality requirements

5.1 The quality indicators of soya beans shall comply with the requirements in Table 1.

5.2 The quality indicators of high-oil soya beans shall comply with the requirements in Table 2.

5.3 The quality indicators of high-protein soya beans shall comply with the requirements in Table 3.

6 Inspection methods

6.1 Sample cutting and dividing: implement in accordance with the requirements of GB/T 5491.

6.2 Inspection of percent of sound kernel: implement in accordance with Annex A.

6.3 Inspection of percent of damaged kernel: implement in accordance with Annex A.

6.4 Inspection of percent of heat-damaged kernel: implement in accordance with Annex A.

6.5 Inspection of impurities: implement in accordance with GB/T 5494.

6.9 Determination of protein content: implement in accordance with GB 5009.5. The coefficient (F) for converting nitrogen into protein is calculated as 6.25. The test results are calculated according to formula (1).

6.10 Determination of fat content: implement in accordance with the first method specified in GB 5009.6-2016. The test results are calculated according to formula (2).

7 Inspection rules

7.1 The general rules for inspection shall be implemented in accordance with GB/T 5490.

7.2 The inspection batch shall be soya beans of the same category, origin, harvest year, transportation unit and storage unit.

7.5 High-protein soya beans are graded according to protein content. If the protein content is lower than the minimum grade, they are not classified as high-protein soya beans. Other indicators are implemented in accordance with relevant national regulations.

8 Labeling

8.1 It shall indicate the name, category, grade, origin, and harvest year of the product on the packaging or accompanying documents.

8.2 The labeling of prepackaged soya beans shall comply with relevant national standards.

8.3 The packaging, storage, and transportation markings of the outer packaging shall comply with the requirements of GB/T 191.

8.4 Genetically modified soya beans shall be labeled according to relevant national regulations.

9 Packaging, storage, and transportation

Annex A (normative) Inspection methods for percent of sound kernel, percent of damaged kernel and percent of heat-damaged kernel