GB/T 5492-2008Inspection of grain and oils - Identification of colour, odour and taste of grain and oilseeds (English PDF)

Foreword

This Standard replaces GB/T 5492-1985 "Inspection of grain and oilseeds - Methods for identification of colour, odour and taste".

Compared with GB/T 5492-1985, the main changes of this Standard are as follows.

- MODIFY the name of the standard;

- ADD the normative references and principle;

- ADD the requirements for environment and laboratory;

- IMPROVE the methods for identification of colour, odour and taste of grain and oilseeds;

- ADD the sample size for identification;

- DELETE the original annex of this Standard.

1 Scope

This Standard specifies the principle, equipment, environment and laboratory, operating procedures and result representation of the identification of colour, odour and taste of grain and oilseeds.

This Standard applies to the identification of colour, odour and taste of commercial grain and oilseeds.

2 Normative references

The following documents contain the provisions which, through reference in this Standard, become the provisions of this Standard. For dated references, their subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard. However, the parties who enter into agreement based on this Standard are encouraged to investigate whether the latest versions of these documents are applicable. For undated reference documents, the latest versions apply to this Standard.

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

GB/T 10220 Sensory analysis - Methodology - General guidance

GB/T 13868 Sensory analysis - General guidance for the design of test rooms

3 Principle

Take a certain amount of sample, remove impurities, and identify its colour, odour, and taste by means of sensory organs according to the specified methods under the specified conditions. It is expressed as "normal" or "abnormal".

4 Equipment

4.1 Balance. The division value is 1 g.

4.2 Grain sieve.

4.3 Flat plate (20 cm × 40 cm) with black paper attached.

5 Environment and laboratory

The environment shall comply with the provisions of GB/T 10220 and GB/T 22505.

6 Operating procedures

7 Result representation

7.1 The results of identification of colour and odour of grain and oilseeds are expressed as "normal" or "abnormal". The "abnormal" shall be explained. […]