120 Mechanical Sampling of Grain

Methods Type: Generic Methods
Key data
Number: 120
Analyte: Mechanical Sampling
Matrix: Grains
Year of Approval: 1974
Scope: This standard specifies general conditions relating to mechanical sampling for the assessment of the quality of cereal grains. This standard does not apply to seed grain.
Principle: The principle of the method is to obtain an average sample corresponding in every respect to the average characteristics and composition of the parcel from which it has been drawn.

Definitions

  • Consignment
    The quantity of grain dispatched at one time and covered by a particular contract or shipping document.
  • Lot
    A stated portion on the consignment which will allow the quality to be assessed.
  • Primary sample
    A small quantity drawn from the grain-stream at a certain time.
  • Bulk sample
    The quantity of grain formed by combining and mixing the primary samples drawn from any one particular lot.
  • Final lot sample
    A sample representing the quality of the lot, obtained by reduction of the bulk sample.
  • Laboratory sample
    A smaller quantity obtained by careful subdivision of the final lot sample on which analyses will be performed. The processes are described in the relevant methods of analysis.

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