GB/T 4372.5-2014 English PDF

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GB/T 4372.5-2014: Methods for chemical analysis of zinc oxide produced by direct process -- Part 5: Determination of zinc oxide manganese content -- Flame atomic absorption spectrometry method
Status: Valid

GB/T 4372.5: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4372.5-2014	139	Add to Cart	3 days	Methods for chemical analysis of zinc oxide produced by direct process -- Part 5: Determination of zinc oxide manganese content -- Flame atomic absorption spectrometry method	Valid
GB/T 4372.5-2001	199	Add to Cart	2 days	Methods for chemical analysis of zinc oxide produced by direct process -- Determination of zinc oxide manganese content -- Atomic absorption spectrometry method	Obsolete
GB/T 4372.5-1984	RFQ	ASK	3 days	Methods for chemical analysis of zinc oxide (direct process)--The anthraquinone method for the detection of metallic zinc	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 4372.2   

Basic data

Standard ID: GB/T 4372.5-2014 (GB/T4372.5-2014)
Description (Translated English): Methods for chemical analysis of zinc oxide produced by direct process -- Part 5: Determination of zinc oxide manganese content -- Flame atomic absorption spectrometry method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H13
Classification of International Standard: 77.120.60
Word Count Estimation: 6,622
Date of Issue: 12/5/2014
Date of Implementation: 8/1/2015
Older Standard (superseded by this standard): GB/T 4372.5-2001
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 the method for determination of the direct method zinc oxide manganese content. This section applies to the determination of the direct method zinc oxide manganese content. Determination of the range of 0.000 to 0.001 0% 1%.

GB/T 4372.5-2014: Methods for chemical analysis of zinc oxide produced by direct process -- Part 5: Determination of zinc oxide manganese content -- Flame atomic absorption spectrometry 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 5. Determination of zinc oxide manganese content - Flame atomic absorption spectrometry method. ICS 77.120.60 H13 National Standards of People's Republic of China Replacing GB/T 4372.5-2001 Zinc oxide direct method of chemical analysis methods Part 5. Determination of the amount of manganese Flame Atomic Absorption Spectrometry Part 5. Determinationofmanganesecontent- 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 5. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 4372.5-2001 "zinc oxide direct method of chemical analysis by flame atomic absorption spectrometry manganese content", and GB/T 4372.5-2001 compared to the main changes are as follows. --- The lower limit of detection by the adjustment of 0.00005% 0.0001%; --- 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. Beijing Nonferrous Metal Research Institute, Hunan Nonferrous Metals Group Co., Ltd. Shuikoushan, Guilin, China Nonferrous minerals Institute of Geological Ltd., Zhuzhou Smelter Group Co., Ltd. Fangchenggang Entry-Exit Inspection and Quarantine Bureau. The main drafters of this section. LI Yan-fen, Liu Ying, Zang Muwen, Tan Qian, Jie Hui, Wang Jiang Liang, ancient dry line, Xie Xiqing, Jiang Qing, Wei Xin-hong, He Long cool. This part of the standard replaces the previous editions are. --- GB/T 4372.5-1984; GB/T 4372.5-2001. Zinc oxide direct method of chemical analysis methods Part 5. Determination of the amount of manganese Flame Atomic Absorption Spectrometry

1 Scope

GB/T 4372 provisions of this part of the determination of the direct method zinc oxide manganese content. This section applies to the determination of the direct method zinc oxide manganese content. Determination range of 0.0001% to 0.0010%.

2 Method summary

Sample dissolved in nitric acid, ferric hydroxide as a co-precipitating agent, a large number of trace manganese and zinc substrate separated and enriched, atomic test solution Absorption spectrometer wavelength 279.5nm measured absorbance in the working curve method for the determination of manganese content.

3 Reagents and materials

Unless otherwise indicated in the analysis using only recognized as analytical reagents; the water is deionized water, the resistivity of not less than 18.2MΩ. 3.1 ammonium persulfate. Nitrate 3.2 (ρ1.42g/mL). 3.3 Hydrogen peroxide (ρ1.44g/mL). 3.4 ammonia. 3.5 nitric acid (11). 3.6 nitric acid (19). Hydrogen peroxide 3.7 - nitrate mixture. 100mL nitric acid (3.6) was added 5mL of hydrogen peroxide (3.3). 3.8 ferric chloride solution. Weigh 1.43g ferric chloride in 300mL beaker with water wet, add 30mL of nitric acid (3.5), to be dissolved completely shifted 500mL flask, washed with water several times a beaker and poured into a volumetric flask, dilute to the mark, and mix the solution 1mL iron 2.0mg. 3.9 manganese standard stock solution. Weigh 0.1000g of manganese metal (wMn≥99.99%), placed in 300mL beaker, add 20mL of nitric acid (3.5), and heated to dissolve completely cooled. Moved into 1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL containing 100μg manganese. 3.10 Manganese standard solution. Pipette 2.5mL manganese standard stock solution (3.9) in 100mL volumetric flask, dilute with water to volume, and mix. this Solution 1mL manganese 2.5μg.

4 Instrument

Atomic absorption spectrometer, with a manganese hollow cathode lamp. Under optimum working conditions, can be achieved by the following indicators can be used. Sensitivity. In line with the measurement sample solution matrix solution, characteristic concentration of manganese should not exceed 0.020μg/mL. Precision. measuring the absorbance at 10 times the highest concentration of the standard solution, the standard deviation should not exceed the average absorbance of 1.0%; most Low concentrations of the standard solution (not a zero standard solution) absorbance measured 10 times, and the standard deviation should not exceed the mean absorbance of the highest concentration of the standard 0.5% luminosity. Linear curve. The curve is divided into five sections according to concentration, than the difference between the absorbance of the absorbance difference between the highest and the lowest segment segment, It should not be less than 0.7. ......

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