BS ISO 19942:2018 pdf download

BS ISO 19942:2018 pdf download.Maize (Zea mays L.) — Specification
1 Scope
This document specifies minimum specifications for maize (Zea mays L.) intended for human consumption and which is the subject of international trade.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5223, Test sieves for cereals
ISO 6540, Maize — Determination of moisture content (on milled grains and on whole grains)
ISO 6639-3, Cereals and pulses — Determination of hidden insect infestation — Part 3: Reference method
ISO 6639-4, Cereals and pulses — Determination of hidden insect infestation — Part 4: Rapid methods
ISO 7971-1, Cereals — Determination of bulk density, called mass per hectolitre — Part 1: Reference method
ISO 7971-3, Cereals — Determination of bulk density, called mass per hectolitre — Part 3: Routine method
ISO 24333, Cereals and cereal products — Sampling
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1 bulk density
test weight
cereals ratio of the mass of a cereal to the volume it occupies after being poured into a container under well-defined conditions
Note 1 to entry: Bulk density is expressed in kilograms per hectolitre of grains as received. Other units such as grams per litre or pound per bushel could also be used.
3.2 impurity
all matters of a sample of grain other than the basic cereal of unimpaired quality
Note 1 to entry: In maize, impurities comprise four main categories: broken grains (3.3), damaged grains (3.4),other grains (3.5) and miscellaneous impurities (3.6).
Note 2 to entry: Live pests are not considered as impurities. They are specified as separate criterion.
[SOURCE: EN 16378:2013, 3.1]
4 Specifications
4.1 General characteristics and sensory properties Maize shall be sound, clean and have no foreign odours or odours denoting any deterioration.
4.2 Health characteristics Maize grains shall be free from intentionally added substances and heavy metals in amounts which can represent a hazard to human and/or animal health. Maize shall not contain mycotoxins, pesticides residues or other contaminants at levels (or concentration) which can affect human and/or animal health. The maximum levels authorized are laid down by the national or regional regulation, or the joint FAO/WHO Codex Alimentarius Commission (see References [4] to [7]). Maize shall be free from the living insects (listed in Annex B), when determined according to ISO 6639-3 or ISO 6639-4, and of mites, when determined by the sieving method, which are clearly visible to the naked eye.