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GB/T 4372.4-2015 English PDF

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GB/T 4372.4-2015: Methods for chemical analysis of zinc oxide produced by direct process -- Part 4: Determination of cadmium oxide content -- Flame atomic absorption spectrometry method
Status: Valid

GB/T 4372.4: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 4372.4-2015English149 Add to Cart 3 days [Need to translate] Methods for chemical analysis of zinc oxide produced by direct process -- Part 4: Determination of cadmium oxide content -- Flame atomic absorption spectrometry method Valid GB/T 4372.4-2015
GB/T 4372.4-2001English199 Add to Cart 3 days [Need to translate] Methods for chemical analysis of zinc oxide produced by direct process -- Determination of cadmium oxide content -- Atomic absorption spectrometry method Obsolete GB/T 4372.4-2001
GB/T 4372.4-1984EnglishRFQ ASK 3 days [Need to translate] Methods for chemical analysis of zinc oxide (direct process)--The potassium periodate photometric method for the determination of manganese content Obsolete GB/T 4372.4-1984

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Basic data

Standard ID GB/T 4372.4-2015 (GB/T4372.4-2015)
Description (Translated English) Methods for chemical analysis of zinc oxide produced by direct process -- Part 4: Determination of cadmium oxide 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 7,746
Date of Issue 2015-09-11
Date of Implementation 2016-04-01
Older Standard (superseded by this standard) GB/T 4372.4-2001
Regulation (derived from) National Standard Announcement 2015 No.25
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

GB/T 4372.4-2015: Methods for chemical analysis of zinc oxide produced by direct process -- Part 4: Determination of cadmium oxide 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.
(Direct method zinc oxide chemical analysis - Part 4. Determination of the amount of cadmium oxide by flame atomic absorption spectrometry ICS 77.120.60 H13 National Standards of People's Republic of China Replacing GB/T 4372.4-2001 Direct method of chemical analysis of zinc oxide Part 4. determination of cadmium oxide content Flame atomic absorption spectrometry Part 4. Determination ofcadmiumoxidecontent- 2015-09-11 release 2016-04-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

GB/T 4372 "Direct method of zinc oxide chemical analysis method" is divided into seven parts. - Part 1. Determination of zinc oxide content Na2EDTA titration; - Part 2. Determination of lead oxide - Flame atomic absorption spectrometric method; - Part 3. Determination of copper oxide - Flame atomic absorption spectrometric method; - Part 4. Determination of cadmium oxide - Flame atomic absorption spectrometric method; - Part 5. Determination of manganese content - Flame atomic absorption spectrometric method; - Part 6. Inspection of metallic zinc; - Part 7. Determination of ferric oxide content - Flame atomic absorption spectrometric method. This part is part 4 of GB/T 4372. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part of the GB/T 4372.4-2001 "Direct method of zinc oxide chemical analysis of atomic absorption spectrometry determination of cadmium content." Compared with GB/T 4372.4-2001, the main changes in this section are as follows. --- the text format has been modified; - Added precision and test reports. This standard is owned by the National Committee for the Standardization of Nonferrous Metals (SAC/TC243). This standard is responsible for drafting units. Hunan Shuikou Nonferrous Metals Group Co., Ltd., Hunan Nonferrous Metals Research Institute. This part of the drafting unit. Hunan Shuikou Nonferrous Metals Group Co., Ltd., Beijing Nonferrous Metals Research Institute, China Nonferrous Guilin Mineral Quality Research Institute Co., Ltd., Hunan Nonferrous Geological Exploration Institute, Guangzhou Nonferrous Metals Research Institute, Yunnan Yun Copper Zinc Industry Co., Ltd. This part of the main drafters. Xia Bingwei, Ouyang Li Li, Zheng Xueying, Ding Hao, Li Manzhi, Wang Jiangliang, Lu Qiyu, Li Jinyan, Wei Xianghui, Xie Hui, Li Xiaoling, Yang Deli, Huang Ping, Jiang Bo, Yang Hongxian. This part of the previous version of the standard to replace the release of the situation. --- GB/T 4372.4-1984; --- GB/T 4372.4-2001. Direct method of chemical analysis of zinc oxide Part 4. determination of cadmium oxide content Flame atomic absorption spectrometry

1 Scope

This part of GB/T 4372 specifies the method for the determination of cadmium oxide in direct zinc oxide. This part applies to the determination of cadmium oxide in direct zinc oxide. Measuring range. 0.0020% ~ 0.300%.

2 method summary

The sample was dissolved in nitric acid and used in a dilute nitric acid medium using an air-acetylene flame at a wavelength of 228.8 nm at the atomic absorption spectrometer Cadmium absorbance, the standard curve method to calculate the amount of cadmium oxide.

3 reagent

Unless otherwise stated, only the reagents identified as analytical reagents and distilled or deionized water or comparable purity were used in the analysis. 3.1 nitric acid (ρ = 1.42 g/mL). 3.2 nitric acid (1 1). 3.3 Cadmium standard storage solution. Weigh 1.0000g metal cadmium (wCd ≥ 99.99%) placed in 250mL beaker, add 10mL nitric acid (3.2), slightly heat dissolved, remove the cooling, into the 1000mL volumetric flask, add 40mL nitric acid (3.2), diluted with water to the mark, mix. 1 mL of this solution contains 100 μg of cadmium. 3.4 Cadmium standard solution. Remove 10.00mL cadmium standard storage solution (3.3) in 100mL volumetric flask, add 5mL nitric acid (3.2), with Water diluted to the mark, mix well. 1 mL of this solution contains 10 μg of cadmium, respectively

4 instruments

Atomic Absorption Spectrometer, Cadmium Hollow Cathode Lamp. In the best working conditions of the instrument, who can meet the following indicators can be used. Sensitivity. The concentration of copper and cadmium should not be greater than 0.035 μg/mL in solutions consistent with the measurement sample solution matrix. Precision. the highest concentration of the standard solution measured 10 times the absorbance, the standard deviation should not exceed 1.0% of the average absorbance; with the most Low standard solution (not zero standard solution) measured 10 times the absorbance, the standard deviation does not exceed the maximum concentration of standard solution average absorbance 0.5% of the degree. The linearity of the working curve. the ratio of the difference between the absorbance difference and the absorbance difference of the lowest section is divided into five segments according to the concentration, Should not be less than 0.7.

5 samples

5.1 Specimen size should be less than 0.10mm.

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