ISO 4874:2020 PDF
Tobacco — Sampling of batches of raw material — General principles
Tobacco — Sampling of batches of raw material — General principles
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 12
- Дата публикации:
- 7 января 2020 г.
- Издание:
- ISO IS 4874 edition 3 version 1
- ICS:
- 65.160
This document specifies the general principles to be applied when sampling batches of raw tobacco in order to assess either — the mean value of one or more of its characteristics, or — the heterogeneity of one or more of its characteristics. Manufactured tobacco products, including products intended for sale or distribution, are specifically not included in the scope of this document. This document is applicable to the sampling of batches of raw tobacco of the following types: a) leaf tobacco: flue cured; air cured; sun cured; fire cured; b) pretreated raw tobacco: which has undergone fermentation (in packages not intended for retail or wholesale sales or distribution, in bulk, in chambers); which has been partially or completely stemmed; which is in the form of stems; which is in the form of waste and remnants; which has been reconstituted in the form of strips.
Abstract
Overview
ISO 4874:2020 - Tobacco: Sampling of batches of raw material - General principles sets out the general principles and procedures for sampling batches of raw tobacco to assess either the mean values of one or more characteristics or the heterogeneity of those characteristics. The standard applies to raw leaf and pretreated tobaccos (flue-cured, air-cured, sun-cured, fire-cured and several pretreated forms). Manufactured tobacco products (ready-for-sale items) are explicitly excluded.
Key topics and technical requirements
- Scope and purpose: Sampling aimed at estimating mean values or assessing heterogeneity of physical, chemical, botanical or organoleptic characteristics.
- Contractual arrangements: Contracts should specify sampling stages, responsible parties, characteristics to be measured, designated laboratories, and maximum time between sampling and analysis.
- Sampling units and definitions: A sampling unit is a separately packaged part of a consignment (bale, sack, case). For bulk tobacco, a consignment mass m kg can be notionally divided into m/100 sampling units.
- Selection methods:
- Random sampling - each unit has equal selection probability.
- Periodic systematic sampling - select units h, h+k, h+2k, … where nk ≤ N
Технические детали
- Технический комитет
- ISO/TC 126/SC 2 - Leaf tobacco
- SKU
- ISO 4874:2020
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