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GB/T 20245.2-2013: Expression of performance of electrochemical analyzers -- Part 2: pH value
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 20245.2-2013 | English | 294 |
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Expression of performance of electrochemical analyzers -- Part 2: pH value
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GB/T 20245.2-2013
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Basic data | Standard ID | GB/T 20245.2-2013 (GB/T20245.2-2013) | | Description (Translated English) | Expression of performance of electrochemical analyzers -- Part 2: pH value | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N53 | | Classification of International Standard | 71.040.10 | | Word Count Estimation | 15,140 | | Quoted Standard | GB/T 20245.1-2006; ISO 9001; ISO 9002; ISO 9003 | | Adopted Standard | IEC 60746-2-2003, IDT | | Regulation (derived from) | National Standards Bulletin 2013 No. 10 | | 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 analyzer, sensor unit and electronic unit terms, definitions, and requirements described by the manufacturer for the determination of pH of aqueous solutions; establish such performance test analyzer, sensor unit and the electr | GB/T 20245.2-2013: Expression of performance of electrochemical analyzers -- Part 2: pH value---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.
Expression of performance of electrochemical analyzers Part 2.. PH value
ICS 71.040.10
N53
National Standards of People's Republic of China
Performance of electrochemical analyzers
Part 2. pH value
Part 2. pHvalue
(IEC 60746-2.2003, IDT)
Issued on. 2013-07-19
2013-12-15 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 20245 "performance of electrochemical analyzers" is divided into the following five sections.
--- Part 1. General;
Part --- Article 2. pH value;
--- Part 3. electrolyte conductivity;
--- Part 4. using coated current sensor measurement of dissolved oxygen;
--- Part 5. redox potential.
This section GB/T 20245 Part 2.
This section drafted in accordance with the rules of GB/T 1.1-2009 and GB/T 20000.2-2009 given.
This section uses the translation method is equivalent to using IEC 60746-2.2003 "performance of electrochemical analyzers - Part 2. pH value."
Consistency correspondence between this part of international documents and normative references of our files are as follows.
--- GB/T 19001-2008 quality management system requirements (ISO 9001.2008, IDT)
For ease of use, this section made the following editorial changes.
--- GB/T 20245.2 standard text used in "this part of GB/T 20245 of" instead of "IEC 60746 Part of the present";
--- Decimal symbol used in place of ",". ",";
--- Included IEC 60746-2 errata Errata 1 and 2 content;
--- Remove the foreword to international standards.
Please note that some of the content of this document may involve patents. Release mechanism of the present document does not assume responsibility for the identification of these patents.
This part is proposed by China Machinery Industry Federation.
This part of the measurement and control of Standardization Technical Committee (SAC/TC124) is administered by the National industrial processes.
This section drafted by. China Instrument Industry Association, Shanghai Electronics Scientific Instrument Co., Ltd., China Institute of Metrology,
Sichuan-Chongqing Analytical Instruments Co., FPI (Hangzhou) Co., Ltd. Hailei magnetic sensor, meter Shanghai
Technology Research Institute to test the amount of Beijing Institute of Metrology detection, Beijing Institute for the Analysis instruments.
The main drafters of this section. Maya Juan, Wang Qiaomei repair Hongyu, Li Xin, Wang Xinyuan, Wu Jianzhong, Wangzhen Tao, Wu Hong, Louxing Jun.
Performance of electrochemical analyzers
Part 2. pH value
1 Scope
GB/T 20245 purpose of this section is.
--- Manufacturer specifies the terms described for the determination of pH of aqueous solutions analyzer, sensor unit and electronic unit, definitions and
Claim;
--- Establishment of such a performance test analyzer, sensor unit and electronic unit;
--- Provide basic document for the ISO 9001, ISO 9002 and ISO 9003 quality management standard applications.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 20245.1-2006 performance of electrochemical analyzers represent - Part 1. General (IEC 60746.1.2003, IDT)
ISO 9001 quality management system requirements (Qualitymanagementsystems-Requirements)
Quality assurance model ISO 9002 quality system of production, installation and service (Qualitysystems-Modelforquality
assuranceinproduction, instalationandservicing)
ISO 9003 quality system for final inspection and test quality assurance model (Qualitysystems-Modelforquality
assuranceinfinalinspectionandtest)
3 Terms, definitions and symbols
3.1 Terms and Definitions
GB/T 20245.1-2006 and as defined in the following terms, definitions and symbols apply to this document.
3.1.1
pH value pHvalue
ΑH used to describe the activity of hydrogen ions in aqueous solution, with the following formula.
pH = -lgαH
pH is a pH value using a known standard buffer solution, the test sample is subjected to force E between the electrodes by measuring immersion
measured. Battery schematic view.
Reference pH electrode sample electrode E
In the standard buffer solution pH (S1), and with the same pair of electrodes at the same temperature, measured in accordance with the following figure.
Reference electrode buffer solution (S1) than the pH electrode E (S1)
Electromotive force difference E (S1) is defined as the potential of the right side (pH electrode) minus the left side (reference electrode) of potential.
Then the ideal pH value of the sample according to formula (1).
pH = pH (S1) -EE
(S1)
(1)
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