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SN/T 4762-2017: Determination of fluorine and chlorine in coal--Ion chromatography
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| SN/T 4762-2017 | English | 229 |
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Determination of fluorine and chlorine in coal--Ion chromatography
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SN/T 4762-2017
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Basic data | Standard ID | SN/T 4762-2017 (SN/T4762-2017) | | Description (Translated English) | Determination of fluorine and chlorine in coal--Ion chromatography | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | D21 | | Word Count Estimation | 10,143 | | 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 4762-2017: Determination of fluorine and chlorine in coal--Ion chromatography---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Determination of fluorine and chlorine in coal - Ion chromatography)
People's Republic of China Entry-Exit Inspection and Quarantine Industry Standard
Determination of fluorine and chlorine in coal - Ion chromatography
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 is mainly drafted by. Shanxi Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.
The main drafters of this standard. Pan Yali, Zhao Fabao, Yuan Li, Kang Lihua, Liu Haifeng, Guo Xiaoxi, Yao Yating, Liu Xiaolin.
Determination of fluorine and chlorine in coal - Ion chromatography
1 Scope
This standard specifies the method of ion chromatography for the determination of fluorine and chlorine in coal.
This standard applies to the determination of fluoride ion (F-) and chloride ion (Cl-) content in coal. The limit of quantitation of the method. fluorine 10.3 μg/g,
Chlorine 0.0015%.
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
GB/T 213 coal calorific value measuring method
Preparation method of GB/T 474 coal sample
Preparation of standard solution for GB/T 602 chemical reagent impurity determination
GB/T 6682 Analytical laboratory water specifications and test methods
3 Method summary
A certain amount of coal is completely burned in an oxygen bomb filled with excess oxygen, and the released fluorine and chlorine are absorbed by the ammonium carbonate solution, and the oxygen bomb is rinsed with water.
Internally, the absorption liquid is completely transferred to the beaker, and after filtration and constant volume, the potassium hydroxide solution is used as the eluent, and the filtration is performed by ion chromatography external standard method.
The content of fluorine and chlorine in the liquid.
4 reagents and materials
Unless otherwise specified, the reagents used in this standard are of analytical grade, and the test water is the first grade water specified in GB/T 6682.
4.1 anhydrous ammonium carbonate, excellent grade pure.
4.2 10 g/L ammonium carbonate [(NH4) 2CO3] solution. Weigh 5.0 g of ammonium carbonate dissolved in water to prepare a 500 mL solution.
4.3 Potassium hydroxide eluent, prepared according to the instrument manual or electrolytic eluent generator. See Appendix A for the eluent gradient.
4.4 Oxygen, purity above 99.5%, free of combustible materials.
4.5 Fluorine standard stock solution (1000μg/mL). Prepare according to GB/T 602 method or directly use the national certified standard solution.
4.6 Chlorine standard stock solution (1000μg/mL). Prepare according to GB/T 602 method or directly use the national certified standard solution.
4.7 Mixed standard working solution. According to the ion concentration in Table 1, prepare mixed standard working solution (also according to the ion concentration in the sample solution)
The range is adjusted appropriately, or directly diluted with water using a standard aqueous solution of a standard with a standard substance certificate.
Table 1 Concentration standard of mixed ion standard solution is microgram per milliliter
Serial number F- Cl-
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