SN/T 0736.1-2012Inspection for import and export fertilizers - Part 1: Sampling and sample preparation (English PDF)

1 Scope

This Part of SN/T 0736 specifies the sampling and sample preparation methods for samples used for inspection of import and export fertilizers.

This Part applies to the sampling and sample preparation of bagged or bulk goods of import and export fertilizers.

2 Normative references

The following referenced documents are indispensable for the application 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.

GB/T 1992 Freight container vocabulary

GB/T 4549.1 Railway vehicle vocabulary - Part 1: Basic vocabulary

3 Terms and definitions

For the purpose of this document, the following terms and definitions apply.

3.1 consignment and amount of consignment

Products with the same mark and the same specification delivered at one time are considered a consignment; the quantity constituting a consignment of fertilizers is the amount of consignment; bulk fertilizers are measured in tons (t), and bagged fertilizers are measured in pieces.

3.2 basic amount of consignment

The basic quantity to sample from a consignment of bulk or bagged fertilizers is the basic amount of consignment.

3.3 increment

Each sample of a specified weight taken from a bag in a consignment of fertilizers or from a specified part of bulk fertilizers.

3.4 sub-sample

A sample consisting of several increments from a consignment of fertilizers.

3.5 gross sample

A sample consisting of all increments or all sub-samples of a consignment of fertilizers.

3.6 sample for assaying

A sample taken by reduction from a gross sample or a sub-sample for composition analysis.

3.7 moisture sample

A sample taken by reduction from a gross sample or a sub-sample for determination of moisture content.

3.8 particle size sample

A sample taken by reduction from a gross sample or a sub-sample for particle size screening.

3.9 universal sample

A sample taken by reduction and can be used for determination of more than two items, such as a moisture sample and a sample for assaying.

3.10 freight container

An equipment for transporting goods, which shall meet the following conditions:

a) It has sufficient strength and stiffness and can be used repeatedly for a long time;

b) It is suitable for carriage by one or more modes of transportation, and the goods in the container do not need to be repacked during transshipment;

c) It has devices to facilitate rapid loading, unloading and handling, especially transferring from one mode of transportation to another;

d) It facilitates filling and emptying of goods;

e) It has a volume of 1 m3 and above;

f) It is a freight tool designed to ensure safety and has the ability to prevent unauthorized persons from easily entering.

See GB/T 1992 for details.

3.11 wagon; freight car

A vehicle intended for the transport of goods and used for this purpose or in principle grouped in goods trains. According to usage, it can be divided into general-purpose wagons and special-purpose wagons.

See GB/T 4549.1 for details.

4 Sampling

5 Sample preparation

5.1 After all the increments have been taken, mix the obtained increments thoroughly and divide them into parts using the cone quartering method or the bisection method.

Take out about 2 000 g and divide it into three parts: one part is the particle size sample, which is about 1000 g; one part is the sample for assaying, which is about 500 g; one part is the moisture sample, which is about 500 g. Put them into well-sealed containers, seal and label them for inspection.

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