2.1.1 Lot: A batch or production unit which may be identified by the same code. When there is no code identification, a lot may be considered as (a) that quantity of milk powder produced under essentially the same conditions, at the same establishment and representing no more than one day's production; or, (b) the quantity of milk powder from one and the same manufacturer available for sampling at a fixed location.

2.1.2 Sample: The sample units (subsamples) taken per lot for analysis.

2.1.3 Sample Unit: Usually a consumer size container of the product, and should consist of a minimum of 100 g. A sample unit is often referred to as a subsample.

2.1.4 Analytical Unit: That amount of product withdrawn from the sample unit for analysis.

2.2.1 A sample, consisting of 20 sample units drawn at random from each lot, shall be taken.

2.2.2 Each sample unit shall consist of at least 100 g.

2.2.3 Collect original unopened containers wherever possible.

2.2.4 More than one sample unit may be collected from large institutional or bulk containers when the total number of sample units required exceeds the number of containers in the lot. A sample unit will consist of more than one container when the lot consists of containers smaller than 100 g (e.g., four 25 g containers in each sample unit)