HJ/T 56-2000 in English

VALID

Determination of sulphur dioxide from exhausted gas of stationary source Iodine titration method

Issued on:2000-12-07
Implemented on:2001-03-01
File Format:PDF
Delivery:Via email within 1~3 business days

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Standard No:	HJ/T 56-2000
Document status:	VALID
Title in English:	Determination of sulphur dioxide from exhausted gas of stationary source Iodine titration method
Title in Chinese:	固定污染源排气中二氧化硫的测定碘量法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2000-12-07
Implemented on:	2001-03-01
Chinese Classification:	Z23-Analysis methods for industrial wastewater and pollutants
Professional Classification:	HJ-Environment
Related Keywords:	determination error sulfur dioxide stationary source iodine titration method determination method principle iodine titration method determination error
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1 Scope

This standard specifies the iodine titration method to determine the concentration of sulfur dioxide from exhausted gas of stationary source and the determination of emission rate of sulfur dioxide.

2 Normative References

The following normative document contains provisions which, through reference in this standard, constitute provisions of this standard. It is valid as this standard.

GB/T 16157-1996 The Determination of Particulates and Sampling Methods of Gaseous Pollutants Emitted from Exhaust Gas of Stationary Source

3 Determination Method Principle, Determination Range and Determination Error

Sulfur dioxide in exhausted gas is absorbed by mixed solution of ammonium sulfamate, titrate with iodine standard solution. Calculate the sulfur dioxide concentration by titration. The reaction formula are as follows:

SO2+H2O═H2SO3
H2SO3+H2O+I2═H2SO4+2HI

Determination scope: 100~6000mg/m³; the intra-assay error of the method is not larger than ±6%.

4 Influencing Factors

4.1 When the boiler fuel is burnt in normal operating conditions, the content of reducing substances in exhausted gas such as H2S is very small, whose influence on the determination may be neglected.

Foreword I
1 Scope
2 Normative References
3 Determination Method Principle, Determination Range and Determination Error
4 Influencing Factors
5 Apparatus
6 Reagents
7 Sampling
8 Determination
9 Calculation
10 Calculation of Sulfur Dioxide Emission Rate