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GB/T 2441.8-2010 English PDF (GBT2441.8-2010)

GB/T 2441.8-2010 English PDF (GBT2441.8-2010)

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GB/T 2441.8-2010: Determination of urea -- Part 8: Sulphate content -- Visible turbidimetric method

This Part of GB/T 2441 specifies determination of sulphate content in industrial used urea by visible turbidimetric method. This Part is applicable to the determination of sulphate content in urea produced by the synthesis of ammonia and carbon dioxide.
GB/T 2441.8-2010
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 65.080
G 20
Replacing GB/T 2441.8-2001
Determination of Urea ?€? Part 8. Sulphate
Content ?€? Visible Turbidimetric Method
ISSUED ON. JUNE 30, 2010
IMPLEMENTED ON. JANUARY 1, 2011
Issued by. General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Principles ... 4
4 Reagents and Solutions ... 4
5 Apparatus ... 5
6 Analytical Procedures ... 5
7 Expression of Analytical Results ... 5
Determination of Urea ?€? Part 8. Sulphate
Content ?€? Visible Turbidimetric Method
1 Scope
This Part of GB/T 2441 specifies determination of sulphate content in industrial used urea by visible turbidimetric method.
This Part is applicable to the determination of sulphate content in urea produced by the synthesis of ammonia and carbon dioxide.
2 Normative References
The provisions in following documents become the provisions of this Part through reference in this Part of GB/T 2441. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.
HG/T 2843 Chemical Fertilizer Products - Standard Volumetric, Standard, Reagent and Indicator Solutions for Chemical Analysis
3 Principles
Add barium chloride solution into the acidic medium; which reacts with sulfate ion and produces white suspension particles of barium sulfate, the turbidity formed by which shall be compared with the standard turbidity.
4 Reagents and Solutions
When no specification and preparation method are specified for the reagents, solutions and water used in this Part, they shall conform to the provisions of HG/T 2843. 4.1 Barium chloride solution, 50g/L;
4.2 Hydrochloric acid solution, 1+3;

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