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GB/T 11446.4-2013 PDF English

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GB/T 11446.4-2013: Test method for resistivity of electronic grade water
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GB/T 11446.4: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB/T 11446.4-2013English160 Add to Cart 0-9 seconds. Auto-delivery Test method for resistivity of electronic grade water Valid
GB/T 11446.4-1997English199 Add to Cart 2 days Test methods for resistivity of electronic grade water Obsolete
GB 11446.4-1989English199 Add to Cart 2 days Test method for resistivity of electronic grade water Obsolete

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GB/T 11446.4-2013: Test method for resistivity of electronic grade water

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GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 31-030 L 90 Replacing GB/T 11446.4-1997 Test method for resistivity of electronic grade water Issued on. DECEMBER 31, 2013 Implemented on. AUGUST 15, 2014 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of PRC; Standardization Administration of PRC.

Table of Contents

Foreword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 Measuring principle... 6 5 Disturbing factors... 6 6 Reagents... 6 7 Measuring instruments... 7 8 Measurement procedures... 7 9 Report... 9 Appendix A (Normative) Temperature correction curve of resistivity... 10 Appendix B (Normative) Concentration and conductivity of potassium chloride conductivity standard solution... 11

Foreword

The expected structure of GB/T 11446 is as follows. - GB/T 11446.1 Electronic grade water; - GB/T 11446.2 (To be determined); - GB/T 11446.3 Generic rules for test methods of electronic grade water; - GB/T 11446.4 Test method for resistivity of electronic grade water; - GB/T 11446.5 Test method for measuring trace metals in electronic grade water by atomic absorption spectrophotometry; - GB/T 11446.6 Test method for SiO2 in electronic grade water by spectrophotometer; - GB/T 11446.7 Test method for trace anion in electronic grade water by ion chromatography; - GB/T 11446.8 Test method for total organic carbon in electronic grade water; - GB/T 11446.9 Test method for particles in electronic grade water by instrument; - GB/T 11446.10 Test method for total bacterial count in electronic grade water by membrane filters. This part is Part 4 of GB/T 11446. This part was drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 11446.4-1997 "Test methods for resistivity of electronic grade water". Compared with GB/T 11446.4-1997, this Part mainly has the following changes. - In "3 Terms and definitions", ADD the definition of "Cell constant" (see Chapter 3); - ADD "5 Interference factors" (see Chapter 5); - DELETE "9 Precautions" (Chapter 9 of the 1997 edition). This Part was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This Part shall be under the jurisdiction of China Electronics Standardization Institute. Drafting organizations of this Part. Special Material Quality Supervision and Inspection Center of the Ministry of Information Industry, Institute of Semiconductors of Chinese Academy of Sciences, China Electronics Standardization Institute, 46th Research Institute of China Electronics Technology Group Corporation. The main drafters of this Part. Chu Lianqing, Wang Yi, He Xiukun, Duan Shuguang, Ti Liu Wang, Liu Yun. This standard replaces the standard previously issued as follows. - GB/T 11446.4-1989, GB/T 11446.4-1997. Test method for resistivity of electronic grade water

1 Scope

This Part of GB/T 11446 specifies the test method for the electrical resistivity of electronic grade water. This Part applies to the testing of resistivity of electronic grade water.

2 Normative references

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 11446.1-2013 Electronic grade water GB/T 11446.3-2013 Generic rules for test methods of electronic grade water

3 Terms and definitions

The terms and definitions as defined in GB/T 11446.3-2013, as well as the following terms and definitions, apply to this document. 3.1 Electrical conductivity The conductivity is the reciprocal of the resistivity, which is represented by the symbol δ, in the unit of Siemens per centimeter (S/cm). The theoretical conductivity of pure water is 0.05482 µS/cm (25 °C).

4 Measuring principle

To measure the resistivity of water, a conductivity cell is required. When the two electrode plates of the parallel plate cell are filled with water, the effective distance between the two electrode plates is L (cm); the cross-sectional area of the space is A (cm2). Then the cell constant J (cm -1) is calculated according to formula (1).

5 Disturbing factors

5.1 Changes in the cell constant and temperature compensation, of the resistivity meter or conductivity meter, which is used for measurement, have an impact on the measurement results. 5.2 If the water sample absorbs or loses dissolved gas, it will change the conductivity. Strictly avoid exposing the water sample in the air.

6 Reagents

6.1 Water The EW-I electronic grade water, which is specified in GB/T 11446.1-2013.The water, which is used to prepare the potassium chloride conductivity standard solution, shall be exposed to the laboratory atmosphere, to achieve equilibrium. 6.2 Potassium chloride standard solution Bake the solid conductivity standard potassium chloride (standard substance BW 0401) at 110 °C, for 2 h, before use. Then put it in a desiccator, to cool to room temperature, before use.

7 Measuring instruments

7.1 Conductivity meter For the instrument used in this method, the AC signal, that passes through the conductivity cell, during measurement, shall be an AC signal; its frequency can be in the range of 25 Hz ~ 100 Hz. The measuring range of the thermometer shall be 0 °C ~ 35 °C, which has an accuracy of 0.1 °C. 7.4 Constant temperature water bath 25 °C ± 0.1 °C constant temperature water bath.

8 Measurement procedures

8.1 Determination of the cell constant Use the electronic grade water, that is exposed to the laboratory air, where the air reaches an equilibrium with the carbon dioxide in the air, to thoroughly clean the conductivity cell. Then use the corresponding potassium chloride standard solution, to rinse it 3 times. 8.2 Dynamic measurement of resistivity 8.2.1 Connect the measuring device to the water preparation system. Lead in water, to drive away the bubbles in the pipe and conductivity cell. Adjust the water flow rate (generally not less than 0.3 m/s). Install a thermometer, at the outlet of the conductivity cell.

9 Report

The test report shall be prepared, according to the format given in GB/T 11446.3-2013.

Appendix A

(Normative) Temperature correction curve of resistivity The temperature correction curve of resistivity is as shown in Figure A.1.

Appendix B

(Normative) Concentration and conductivity of potassium chloride conductivity standard solution B.1 Concentration and conductivity of potassium chloride conductivity standard solution The concentration and conductivity of potassium chloride conductivity standard solution are as shown in Table B.1.When using the following standard solutions, it shall ensure that. B.2 Cell constant and standard solution concentration used in different resistivity ranges The cell constant and standard solution concentration, which are used in different resistivity ranges, are as shown in Table B.2. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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