GB/T 8618-2021Sampling methods of the main products in salt making industry (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1. Structure and Drafting Rules of Standardization Documents" drafted.

This document replaces GB/T 8618-2001 "Sampling Method for Main Products of Salt Industry". Compared with GB/T 8618-2001, except for the structure In addition to adjustments and editorial changes, the main technical changes are as follows:

--- Added sampling for production links (see Chapter 1, Chapter 1 of the 2001 edition);

--- Changed the definitions of the terms "batch", "batch", "alternate sample" and "standard deviation of quality fluctuation" (see 3.2, 3.3, 3.7, 3.8, 2001 version 3.2.2, 3.2.8, 3.2.10);

--- Delete the terms and symbols such as "large sample", "preparation sample", "standard deviation", "unit product", "sample" (see 3.2.4 of the 2001 edition, 3.2.5, 3.2.9, 4.2);

--- Added "the container for the final sample should be sealable" (see 4.1.1);

--- Deleted the provisions of products mixed with foreign debris in the general provisions (see 3.1.3 of the 2001 edition);

--- Changed the provisions on the storage period of samples (see 4.1.3, 3.1.4 of the 2001 edition);

---Delete the method for determining the number of aliquots determined by the specified method, by calculation by statistical formula, and by increasing the number of incremental samples in batches (See 3.3.1, 3.3.2, 3.3.4 of the 2001 edition);

--- Increased the classification of edible salt quality fluctuations (see 4.4.1);

--- Changed the minimum number of samples that should be taken for edible salt and the determination method of the minimum number of samples, and the sample collection of edible salt with different packaging specifications. Take the method (see 4.4.2, 3.4.4 of the 2001 edition);

--- Added provisions on the types of quality fluctuations applicable to refined industrial salt and sun-dried industrial salt (see 4.5.1);

--- Changed the sampling method for the iodine content inspection of iodized edible salt (see Chapter 5, Chapter 4 of the 2001 edition).

1 Scope

This document specifies the test samples of edible salt, industrial salt, industrial potassium chloride, industrial magnesium chloride and industrial bromine products, which are the main products of the salt industry.

The sampling method for the iodine content inspection of iodized edible salt is specified.

This document is applicable to sampling in the production, delivery, supervision and random inspection of major products in the salt industry.

2 Normative references

There are no normative references in this document.

3 Terms and Definitions

The following terms and definitions apply to this document.