GB/T 394.1-2008Ethanol for industrial use (English PDF)

5.3 Inspection classification

5.3.1 Delivery inspection

5.3.1.1 Before the products leave the factory, the quality supervision and inspection department of the manufacturer shall carry out inspections in batches in accordance with the provisions of this Part. Only products which pass the inspection and are attached with the certificate of quality conformity can be delivered.

5.3.1.2 Inspection items: appearance, odor, color, ethanol, sulfuric acid test chroma, oxidation time, aldehyde, isobutanol + isoamyl alcohol and methanol.

5.3.2 Type inspection

5.3.2.2 In general, the type inspection of the same type of products is carried out every six months; with any of the following conditions, it shall also be carried out:

a) when there are major changes in raw and auxiliary materials;

b) when there are changes in critical processes or equipment;

c) when the production of a new trial product or a normal production product, which has been stopped for 3 months, is resumed;

d) when the factory inspection is significantly different from the previous type inspection result;

e) when the national quality supervision and inspection institution carries out a spot inspection according to relevant regulations.

5.3.2.1 Inspection items: all required items in this Part

5.4 Decision rules

5.4.1 When there are indicators in the test results that do not meet the requirements of this Part, double samples shall be taken from the same batch of products for re-inspection, and the re-inspection results shall prevail.

5.4.2 When there is still one (or more) failures in the re-inspection result, the whole batch of products is judged as unqualified. […]