GB/T 6609.22-2004Chemical analysis methods and determination of physical performance of alumina -- Sampling (English PDF)

Foreword

This document was drafted in accordance with the provisions of GB/T 1.1-2020

"Directives for standardization - Part 1.Rules for the structure and drafting of

standardizing documents".

This document is Part 22 of GB/T 6609 "Chemical analysis methods and determination

of physical performance of alumina". GB/T 6609 has issued the following parts.

- Part 1.Determination of trace elements content - Inductively coupled plasma

atomic emission spectrometry method;

- Part 2.Determination of loss of mass at 300 °C and 1000 °C;

- Determination of silicon dioxide content - Molybdenum blue photometric method;

- Determination of ferric oxide content - Orthophenanthroline photometric method;

- Part 5.Determination of sodium oxide and potassium oxide contents;

- Part 7.Determination of titanium dioxide, chromium sesquioxide, cupric oxide,

fluorine, chlorine, boron trioxide, phosphorus pentoxide, sulfate contents -

Spectrophotometry method;

- Determination of vanadic oxide content - N-benzoyl-N-phenylhydroxylamine

extraction photometric method;

- Part 11.Determination of manganese oxide and magnesium oxide contents - Flame

atomic absorption spectrometric method;

- Part 12.Determination of zinc oxide content - Flame atomic absorption

spectrometry method;

- Part 13.Determination of calcium oxide content - Flame atomic absorption

spectrometric method;

- Part 19.Determination of lithium oxide content - Flame atomic absorption

spectrometry method;

- Determination of gallium trioxide content - Butyrhodamine B spectrophotometric

method;

- Part 22.Sampling and preparation of test samples;

- Part 24.Measurement of the angle of repose and the angle of flow;

- Part 25.Method for the determination of tapped and untapped density;

Chemical analysis methods and determination of physical

performance of alumina - Part 22.Sampling and

preparation of test samples

1 Scope

This document describes the sampling, preparation, and storage methods for original

and dried alumina test samples used for composition analysis and determination of

physical properties of alumina.

This document applies to sampling and preparation of test samples of alumina during

processes such as transportation (e.g., when conveyed by conveying machinery),

loading and unloading (e.g., when unloaded into containers, silos, or warehouses), and

continuous flow.

2 Normative references

There are no normative references in this document.

3 Terms and definitions

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

3.1

batch sample

A collection of samples taken from a batch of products for testing.

3.2

incremental sample

Each sample taken individually when taking the batch sample.

NOTE. It is a constituent part of the batch sample.

4 Method overview

A constant amount of sample is taken in multiple portions by manual or mechanical

means. The sample retains its physical and chemical properties at the time of sampling.

The sample is mixed and divided to meet the requirements for laboratory testing. The

sample is stored and transported in sealed containers at room temperature.

5 Apparatus

6 Sampling

100 m3, take 10 samples from each batch, each not less than 1kg; if the pile volume

exceeds 100 m³, take 15 samples from each batch, each not less than 1 kg.

7 Preparation of test samples