GB/T 21994.1-2008 English PDFUS$149.00 · In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 21994.1-2008: Chemical analysis of magnesium fluoride -- Part 1: Preparation and storage of test samples Status: Valid
Basic dataStandard ID: GB/T 21994.1-2008 (GB/T21994.1-2008)Description (Translated English): Chemical analysis of magnesium fluoride -- Part 1: Preparation and storage of test samples Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H12 Classification of International Standard: 77.040.30 Word Count Estimation: 5,545 Date of Issue: 2008-06-09 Date of Implementation: 2008-12-01 Quoted Standard: GB/T 6679 Regulation (derived from): National Standard Approval Announcement 2008 No.9 (Total No.122) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies the sample preparation and storage of raw magnesium fluoride and dry samples. This section applies to the preparation and storage of the original sample of magnesium fluoride and drying of the sample. GB/T 21994.1-2008: Chemical analysis of magnesium fluoride -- Part 1: Preparation and storage of test samples---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. Chemical analysis of magnesium fluoride Part 1. Preparation and storage of test samples ICS 77.040.30 H12 National Standards of People's Republic of China Chemical analysis of magnesium fluoride Part 1. Preparation and storage of test samples Posted 2008-06-09 2008-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordGB/T 21994 "Chemical analysis of magnesium fluoride" is divided into eight sections. --- Part 1. Preparation and storage of test samples; --- Part 2. Determination of the weight of water in the wet method; --- Part 3. Determination of distillation of fluorine content - thorium nitrate volumetric method; --- Part 4. Determination of magnesium content - EDTA volumetric method; --- Part 5. Determination of calcium content by flame atomic absorption spectrometry; --- Part 6. Determination of silicon dioxide content - Molybdenum blue spectrophotometric method; --- Part 7. Determination of iron oxide content phenanthroline spectrophotometry; --- Part 8. Determination of sulfate content of barium sulfate gravimetric method. This is Part 1. This part is proposed by the China Nonferrous Metals Industry Association. The non-ferrous metal part by the National Standardization Technical Committee. This section is Hunan Nonferrous fluorine chemical limited liability company, China Nonferrous Metals Industry Institute of Standards Metrology and Quality is responsible for drafting. This section is drafted. Hunan Nonferrous fluorine chemical limited liability company. Participated in the drafting of this section. Fluoride Chemicals Co., Ltd., Silver fluoride limited liability company. The main drafters of this section. Li Zhijian, Liao Zhihui, Chen Xiang Yu, Zhu Liang, Xu Jin Xue, Wang Jianping, Guo Xianhui, Bo, Li Ye. Chemical analysis of magnesium fluoride Part 1. Preparation and storage of test samples1 ScopeThis section provides the sample preparation and storage of the original magnesium fluoride and dry sample. This section applies to the preparation and storage of the original sample and the magnesium fluoride dried sample.2 Normative referencesThe following documents contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to this part of the research agreement Whether the latest versions of these documents. For undated references, the latest edition to adapt to this section. GB/T 6679 General rules for sampling solid chemical products Preparation and storage of specimens 3 3.1 laboratory sample Using GB/T 6679 stipulated in laboratory sample preparation and storage methods. 3.2 Preparation of the original sample For some geometric properties measured for testing certain physical and physico-chemical properties, as well as for determination of hygroscopic moisture. Take about 300g solid Laboratory sample (3.1), which was stored in a sealed container, the container is almost filled sample is appropriate. 3.3 Preparation of dry sample Chemical tests for the determination of certain geometrical characteristics and certain physical and chemical physics test. 3.3.1 Sample grinding The sample was milled and sieved until all of 0.125mm sieve pore size of up. Sieved sample mixed in 110 ℃ ± 5 ℃ drying 2h. 3.3.2 Equipment 3.3.2.1 test sieve. its sieve size of 0.125mm. Made without introducing an impurity element measured material, according to magnesium fluoride and miscellaneous test Nature element selected quality test sieves. 3.3.2.2 mortar. steel made of jade or agate. 3.3.2.3 electric oven. Natural convection ventilation, to control the temperature of 110 ℃ ± 5 ℃. 3.3.3 Procedure 3.3.3.1 About 100g laboratory sample (3.1) through the test sieve (3.3.2.1), the sieve residue particles on the mortar (3.3.2.2 ) Milled and sieved again, sieved material was added to the front of the screen carefully mixing the compound. Repeated grinding, screening, mixing until all samples All through a sieve so far. 3.3.3.2 The sample (3.3.3.1) into a platinum dish, and put into an electric oven (3.3.2.3), the control temperature of 110 ℃ ± 5 ℃ drying 2h. and After removing the platinum dish from an electric oven, placed in a desiccator to cool to room temperature. 3.3.3.3 The sample (3.3.3.2) stored in airtight containers for the storage requirements of the container volume to be almost completely filled with sample Appropriate.4 container tagContainer must be labeled, marked with the following. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 21994.1-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 21994.1-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 2 working days. 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