GB/T 4372.1-2014 English PDF

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GB/T 4372.1-2014: Methods for chemical analysis of zinc oxide produced by direct process -- Part 1: Determination of zinc oxide content-Na2EDTA titration method
Status: Valid

GB/T 4372.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4372.1-2014	139	Add to Cart	3 days	Methods for chemical analysis of zinc oxide produced by direct process -- Part 1: Determination of zinc oxide content-Na2EDTA titration method	Valid
GB/T 4372.1-2001	199	Add to Cart	2 days	Methods for chemical analysis of zinc oxide produced by direct process -- Determination of zinc oxide content -- Na2 EDTA titration method	Obsolete
GB/T 4372.1-1984	RFQ	ASK	3 days	Methods for chemical analysis of zinc oxide (direct process)--The potassium ferrocyanide volumetric method for the determination of zinc oxide content	Obsolete

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GB/T 3884.2   GB/T 3884.1   GB/T 4103.14   GB/T 4372.4   GB/T 4372.3   GB/T 4372.5   

Basic data

Standard ID: GB/T 4372.1-2014 (GB/T4372.1-2014)
Description (Translated English): Methods for chemical analysis of zinc oxide produced by direct process -- Part 1: Determination of zinc oxide content-Na2EDTA titration method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H13
Classification of International Standard: 77.120.60
Word Count Estimation: 6,615
Date of Issue: 12/5/2014
Date of Implementation: 8/1/2015
Older Standard (superseded by this standard): GB/T 4372.1-2001
Regulation (derived from): Announcement of Newly Approved National Standards 2014 No. 27
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 Direct determination of zinc oxide zinc oxide content. This Standard is applicable to the determination of zinc oxide, zinc oxide direct method, the measuring range ��98. 00%.

GB/T 4372.1-2014: Methods for chemical analysis of zinc oxide produced by direct process -- Part 1: Determination of zinc oxide content-Na2EDTA titration 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.
Methods for chemical analysis of zinc oxide produced by direct process.Part 1. Determination of zinc oxide content-Na2EDTA titration method ICS 77.120.60 H13 National Standards of People's Republic of China Replacing GB/T 4372.1-2001 Zinc oxide direct method of chemical analysis methods Part 1. Determination of the amount of zinc oxide Na2EDTA titration Part 1. Determinationofzincoxidecontent- Issued on. 2014-12-05 2015-08-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 4372 "Methods for chemical analysis of zinc oxide direct method" is divided into seven sections. --- Part 1. Determination of the amount of zinc oxide Na2EDTA titration; --- Part 2. Determination of the amount of lead oxide flame atomic absorption spectrometry; --- Part 3. Determination of the amount of copper oxide flame atomic absorption spectrometry; --- Part 4. Determination of the amount of cadmium oxide by flame atomic absorption spectrometry; --- Part 5. Determination of manganese content by flame atomic absorption spectrometry; --- Part 6. zinc inspection; --- Part 7. Determination of ferric oxide by flame atomic absorption spectrometry amount. This is Part 1. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 4372.1-2001 "the determination of zinc oxide direct method of chemical analysis methods Na2EDTA titration amount of zinc oxide" Compared with GB/T 4372.1-2001, have the following main changes. --- Text format has been modified. --- Added precision and test reports. The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized. This section is responsible for drafting unit. Shuikoushan Hunan Nonferrous Metals Group Co., Ltd., Hunan Nonferrous Metal Research Institute. This section is drafted. Shuikoushan Hunan Nonferrous Metals Group Co., Ltd. Zhuzhou Smelter Group Co., Ltd., China Nonferrous Guilin Institute of Geology for Mineral Resources Ltd., Hunan Nonferrous Geological Prospecting Institute, Hunan Nonferrous Metal Research Institute, Beijing General Research Institute of Mining and Metallurgy. The main drafters of this section. Zeng Guangming, Baobing Hui, Mao Yanling, Zhang Ping, Jiang Qing, Yuan Yonghai, Xu Hua, Li Yan, Wei Xianghui, Pang Wenlin, Tangfei Yan, Jiang Tao demand. This part of the standard replaces the previous editions are. --- GB/T 4372.1-1984; GB/T 4372.1-2001. Zinc oxide direct method of chemical analysis methods Part 1. Determination of the amount of zinc oxide Na2EDTA titration

1 Scope

GB/T 4372 provisions of this part of the determination of the amount of zinc oxide zinc oxide direct method. This section applies to the determination of the amount of zinc oxide, zinc oxide direct method. Measuring range ≥98.00%.

2 Method summary

The sample is dissolved with dilute sulfuric acid at pH 5 to 6 hexamethylenetetramine - sulfuric acid buffer solution was added potassium iodide masking cadmium, by adding Sodium masking lead to xylenol orange as indicator, titrate with standard Na2EDTA to bright yellow as the end point.

3 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity. 3.1 ascorbic acid. 3.2 Reference zinc oxide (wZnO≥99.999%). before use at 800 ℃ burning 2h ~ 3h, removed, placed in a desiccator to cool to room temperature. 3.3 sulfate (ρ1.84g/mL). 3.4 ammonia. 3.5 sulfate (13). 3.6 Aqueous ammonia (11). 3.7 hexamethylenetetramine - sulfuric acid buffer solution (pH value 5-6). Weigh 300g hexamine in 2000mL beaker 950mL dissolved in water (if there is a red solution with a cotton filter), then add 50mL sulfuric acid (11), and mix. 3.8 sodium sulfite solution. Weigh 30g of anhydrous sodium sulfite dissolved in 200mL of water was added 50mL sulfurous acid, pH 6 left control Right (effective today). 3.9 potassium iodide solution (200g/L). Weigh 20g of potassium iodide was dissolved in 100mL of water, add a little faded to yellow ascorbic acid (when used Preparation). 3.10 methyl red solution (1.0g/L). 3.11 XO solution (2g/L). 3.12 disodium ethylenediaminetetraacetate (by Na2EDTA) standard solution (c≈0.06mol/L) Preparation. Weigh 22.87gNa2EDTA, add water, heat gently to dissolve, cooled to room temperature and transferred to 1000mL volumetric flask, dilute to the mark with water Degree and mix thoroughly. Calibration after placing 3d. Calibration. Accurately weigh in at 800 ℃ take 0.50000g (accurate to 0.00002g) benchmark zinc (3.2) 3 parts (front oxide in porcelain dish Burning 2h ~ 3h) in 300mL beaker, calibrated by analyzing step 6.3. Averaged, the difference does not meet the requirements should be re-calibrated. Along with the calibration for the blank test. According to formula (1) calculating Na2EDTA standard solution (3.12) of the actual concentration. c = (V-V0) × 0.08137 (1) ......

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