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GB/T 32477-2016Plastics—Determination of total chlorine content in toluene diisocyanates for use in the production of polyurethanes (English PDF)

塑料用于聚氨酯生产的甲苯二异氰酸酯中总氯含量的测定

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

February 24, 2016

Implementation date

September 1, 2016

Scope

GB/T 32477-2016 is the English-translated version of 塑料用于聚氨酯生产的甲苯二异氰酸酯中总氯含量的测定.

GB/T 32477-2016 is the Chinese standard "Plastics—Determination of total chlorine content in toluene diisocyanates for use in the production of polyurethanes". Its scope clause reads: This standard specifies the method for measuring the oxygen bomb method and oxygen flask combustion method toluene diisocyanate in total chlorine.

This standard applies to the determination of the production of polyurethane toluene diisocyanate in total chlorine. Its clauses include interference; method a --- bomb method.

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Document preview — GB/T 32477-2016

National Standard of the People's Republic of China

ICS: 83.040
Classification: G 31

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Normative references
4 Interference
5 Method A --- bomb method

1 Scope

This standard specifies the method for measuring the oxygen bomb method and oxygen flask combustion method toluene diisocyanate in total chlorine.

This standard applies to the determination of the production of polyurethane toluene diisocyanate in total chlorine.

2 Normative references

The following documents for the application of this document is essential. For cited documents with dates, only the dated edition applies to this document. For undated references, the latest edition (including any amendments) applies to this document.

Preparation of GB/T 601 chemical reagent standard titration solution

Laboratory use specifications and test methods GB/T 6682 Analysis

Principle 3

The samples of organic matter and oxygen combustion destruction of organic chlorine into inorganic chlorine, chlorine ions by automatic potentiometric titrator titration with standard silver nitrate solution.

Method A is an oxygen bomb method, the sample under pressure in the oxygen bomb combustion.

Method B is an oxygen flask combustion method, the sample at atmospheric pressure oxygen bottle combustion.

4 Interference

Bromide and iodide ions may be reacted with a silver nitrate solution, resulting in higher total chlorine content.

5 Method A --- bomb method

5.1 instruments and equipment

5.1.1 Ignition Wire

34.

5.1.2 oxygen bomb calorimeter

the oxygen bomb, ignition unit, the inner cylinder, an outer cylinder combustion bowl and other components.

Oxygen Bomb technical parameters are as follows.

a) Capacity. 300mL;

b) the oxygenation pressure. 2.0MPa ~ 3.0MPa;

c) pressure resistance pressure. 20MPa;

d) Quality. 2.5kg […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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