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NB/T 11264-2023: Determination of arsenic, mercury and selenium in oil shale - Atomic Fluorescence spectrometric method
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Determination of arsenic, mercury and selenium in oil shale - Atomic Fluorescence spectrometric method
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NB/T 11264-2023
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PDF similar to NB/T 11264-2023
Standard similar to NB/T 11264-2023 GB/T 38132 GB/T 36081 GB/T 33526 Basic data | Standard ID | NB/T 11264-2023 (NB/T11264-2023) | | Description (Translated English) | Determination of arsenic, mercury and selenium in oil shale - Atomic Fluorescence spectrometric method | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | A40;A49 | | Classification of International Standard | 73.010 | | Word Count Estimation | 9,941 | | Date of Issue | 2023-05-26 | | Date of Implementation | 2023-11-26 | | Issuing agency(ies) | National Energy Administration | NB/T 11264-2023: Determination of arsenic, mercury and selenium in oil shale - Atomic Fluorescence spectrometric method
---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.
ICS 73.010
CCSA40/49
Energy Industry Standards of the People's Republic of China
Determination of arsenic, mercury and selenium content in oil shale
Atomic fluorescence spectrometry
Published on 2023-05-26
Implemented on 2023-11-26
Released by the National Energy Administration
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is proposed by the China Coal Industry Association.
This document is under the jurisdiction of the National Coal Standardization Technical Committee (SAC/TC42).
This document was drafted by. Chongqing Institute of Geology and Mineral Resources, Xinjiang Uygur Autonomous Region Coalbed Methane Testing Research Institute (Xinjiang Uygur Autonomous Region
District Coal Product Quality Inspection Center), Chongqing Huadi Environmental Technology Co., Ltd.
The main drafters of this document. Zhou Min, Lu Xiaohai, Zhao Xuedao, Wang Chunlian, Gong Zhou, Yang Jie, Che Pingping, Wang Xiong.
Determination of arsenic, mercury and selenium content in oil shale
Atomic fluorescence spectrometry
Warning. Nitric acid and hydrochloric acid are highly corrosive. The sample digestion process should be carried out in a fume hood. Experimenters should pay attention to wearing protective equipment.
1 Scope
This document specifies the method summary, reagents and materials, instruments and equipment, analysis methods for the determination of arsenic, mercury and selenium content in oil shale by atomic fluorescence spectrometry.
Analytical steps, result calculation and expression, method precision and accuracy, quality assurance and quality control.
This document is applicable to the determination of arsenic, mercury and selenium content in oil shale.
The detection limits of arsenic, mercury and selenium content in oil shale determined by atomic fluorescence spectrometry. arsenic 0.0096 μg/g, mercury 0.0019 μg/g, selenium
0.0096μg/g.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 6379.2 Accuracy of measurement methods and results (correctness and precision) Part 2.Determination of repeatability of standard measurement methods
Basic methods of sex and reproducibility
GB/T 6682 Specifications and test methods for water used in analytical laboratories
3 Terms and definitions
There are no terms or definitions to be defined in this document.
4 Method summary
After the sample is digested by microwave, pentavalent arsenic is pre-reduced to trivalent arsenic using thiourea-ascorbic acid under acidic conditions, and then hydroborated.
Potassium is used as a reducing agent to reduce arsenic, mercury and selenium in the sample to arsine gas, mercury vapor and hydrogen selenide. Argon gas is used as the carrier gas to introduce atomization.
In the instrument, the contents of arsenic, mercury and selenium were measured on an atomic fluorescence spectrometer.
5 Reagents and materials
Unless otherwise stated, reagents confirmed to be of analytical grade or above and grade three or above evaporators that comply with GB/T 6682 are used in the analysis.
Distilled water or water of equivalent purity.
5.1 Potassium hydroxide.
5.2 Potassium borohydride.
5.3 Thiourea.
5.4 Ascorbic acid.
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