Division 4.1 Preparation of the test solution
United Kingdom
The laboratory sample must be well mixed. Press part of the sample through a non-absorbent gauze (or similar material) folded in four. Discard the first few drops of liquid and use the rest for analysis.
Annotations
Footnotes
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If the products are thick or highly concentrated, it may not be possible to extract the drops of liquid required for refractometric analysis. Under these circumstances the analysis should not be carried out. Under no circumstances should the sample be diluted with water.