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SN/T 4764-2017 English PDF

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SN/T 4764-2017: Determination of total carbon, hydrogen, nitrogen and sulfur content in coal--Elemental analyzer method
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SN/T 4764-2017English229 Add to Cart 3 days [Need to translate] Determination of total carbon, hydrogen, nitrogen and sulfur content in coal--Elemental analyzer method Valid SN/T 4764-2017

PDF similar to SN/T 4764-2017


Standard similar to SN/T 4764-2017

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Basic data

Standard ID SN/T 4764-2017 (SN/T4764-2017)
Description (Translated English) Determination of total carbon, hydrogen, nitrogen and sulfur content in coal--Elemental analyzer method
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard D21
Word Count Estimation 10,139
Date of Issue 2017-05-12
Date of Implementation 2017-12-01
Regulation (derived from) State-Quality-Inspection-Accreditation (2017) 228
Issuing agency(ies) General Administration of Customs

SN/T 4764-2017: Determination of total carbon, hydrogen, nitrogen and sulfur content in coal--Elemental analyzer method


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(Determination of Carbon, Hydrogen, Nitrogen and Sulfur in Coal by Elemental Analyzer) People's Republic of China Entry-Exit Inspection and Quarantine Industry Standard Determination of carbon, hydrogen, nitrogen and sulfur in coal Elemental analyzer Released on.2017-05-12 2017-12-01 implementation People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the National Certification and Accreditation Administration. This standard was drafted. Zhejiang Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China, Hebei Entry-Exit Inspection and Quarantine Bureau, Shanxi Entry-Exit Inspection and Quarantine Bureau, People's Republic of China Tianjin Entry-Exit Inspection and Quarantine Bureau, People's Republic of China Jiangsu Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard. Feng Tao, Tang Zhaoguan, Wang Junhui, Zhang Wei, Yang Puchen, Wang Jing, Qiao Zhu, Wang Ji, Deng Hongyi, He Jun. Determination of carbon, hydrogen, nitrogen and sulfur in coal Elemental analyzer

1 Scope

This standard specifies the elemental analyzer test method for carbon, hydrogen, nitrogen and sulfur content in coal. This standard applies to the determination of carbon, hydrogen, nitrogen and sulfur in lignite, bituminous coal and anthracite.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. Industrial analysis method of GB/T 212 coal Preparation method of GB/T 474 coal sample GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values

3 Method summary

The general analysis of the known mass test coal is fully burned in the high temperature and oxygen flow, and the carbon, hydrogen, nitrogen and sulfur in the coal are completely burned to form two A mixture of carbon oxide, water, nitrogen, nitrogen oxides, sulfur dioxide, and sulfur trioxide. Filter out the effects of interference from the measurement by a specific processing system Factors such as combustion products such as chlorine, and all of the nitrogen oxides are reduced to nitrogen, and all of the sulfur trioxide is reduced to sulfur dioxide. Carbon in coal, The contents of hydrogen, nitrogen and sulfur are determined by thermal conductivity detector, infrared detector, etc. in the form of carbon dioxide, water vapor, nitrogen and sulfur dioxide, respectively. Measured.

4 reagents and materials

4.1 Carrier gas. Helium or other suitable high purity gas with a concentration of not less than 99.999%. 4.2 Oxygen. Oxygen at a concentration of not less than 99.995%. 4.3 Reagents. Reagents specified in the instrument manuals such as powdered tungsten trioxide and tin foil. 4.4 Calibration substance. used for calibration, calibration verification and calibration inspection of the instrument. The calibration materials given in Table 1 are recommended. Table 1 Commonly used calibration materials and their carbon, hydrogen, nitrogen and sulfur contents (mass fraction) Name formula Chemical material Login ID Element content /% Hydrocarbon nitrogen BBOT2,5-bis(5-tert-butyl-2-oxazolyl)thiophene C26H26N2O2S 52232-33-4 72.52 6.09 6.51 7.44 Sulfadiazine C10H10N4O2S 68-35-9 41.81 4.65 16.25 18.26 L-cystine C6H12N2O4S2 56-89-3 29.99 5.03 11.66 26.69 p-Aminobenzenesulfonic acid C6H7NO3S 121-57-3 41.61 4.07 8.09 18.50

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