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GB/T 27503-2011: Test solutions of electrolytic conductivity analyzer -- Preparation method of sodium chloride solutions
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| GB/T 27503-2011 | English | 349 |
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Test solutions of electrolytic conductivity analyzer -- Preparation method of sodium chloride solutions
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GB/T 27503-2011
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Basic data | Standard ID | GB/T 27503-2011 (GB/T27503-2011) | | Description (Translated English) | Test solutions of electrolytic conductivity analyzer -- Preparation method of sodium chloride solutions | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N53 | | Classification of International Standard | 71.040.01 | | Word Count Estimation | 15,190 | | Date of Issue | 2011-10-31 | | Date of Implementation | 2012-01-01 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 15 of 2011 | | 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 atmosphere sodium solution preparation reagents, instruments or equipment, preparation steps and the solution concentration and resistivity of the correspondence. This standard applies to the desired conductivity meter test sodium chloride solution (hereinafter referred to as solution) preparation. | GB/T 27503-2011: Test solutions of electrolytic conductivity analyzer -- Preparation method of sodium chloride solutions
---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.
Test solutions of electrolytic conductivity analyzer. Preparation method of sodium chloride solutions
ICS 71.040.01
N53
National Standards of People's Republic of China
Conductivity Meter test solution
Sodium chloride solution preparation
Issued on. 2011-10-31
2012-01-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
The standard proposed by China Machinery Industry Federation.
The standard measurement and control of the instruments Standardization Technical Committee Technical Committee (SAC/TC124/SC6) by the National Industrial Process
Centralized.
This standard was drafted. Shanghai Precision Scientific Instrument Co., Ltd., Shanghai Measurement and Testing Technology Research Institute, East China Normal University, Shanghai Lei
Pudong magnetic Instrument Factory Lianying Chang.
The main drafters of this standard. Kim Chun law, Wang Qiaomei, Wu Jianzhong, Wang Ye, HE Pin-Gang, He Haidong.
Conductivity Meter test solution
Sodium chloride solution preparation
1 Scope
This standard specifies the correspondence between the sodium chloride solution was prepared using reagents, instruments or equipment, preparation steps and solution concentration and resistivity.
Preparation of sodium chloride solution (hereinafter referred to as a solution) is required for this standard applies to the conductivity meter test.
2 Reagents
Preparation of the solution required reagents.
a) Sodium chloride. AR;
b) Water. water or a laboratory conductivity no greater than 0.2 × 10-6S/cm of distilled or deionized water.
3 instruments or apparatus
Preparation of the solution required for instruments or apparatus.
a) balance. the largest weighing not more than 200g, verification scale value of 0.1mg;
b) electric oven. (0 ~ 300) ℃.
Step 4 Preparation
4.1 Environmental conditions
Solution should be prepared in the following environmental conditions.
a) Ambient temperature. (20 ± 2) ℃;
b) Relative humidity. less than 85%.
4.2 Solution Preparation
After the sodium chloride placed in an electric oven, the temperature control (220 ~ 240) ℃ range, dried for at least 2h, cooled to room temperature, depending on the count
Count, weigh a certain amount of sodium chloride was added to a certain quality of water and thoroughly mixed to obtain the desired mass fraction of the solution, the uncertainty does not exceed
More than 0.25%.
5 solution resistivity and conductivity
5.1 solution resistivity
Table 1 shows the different concentrations of the solution 18 ℃ when the resistivity;
Table 2 (0 to 140) ℃ temperature coefficient within the temperature range of the solution [alpha];
Table 3 is a correction value in the low concentration range of 5% solution of the temperature coefficient α;
The resistivity of the solution by the formula (1) calculation of the other temperatures.
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