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GB/T 20245.4-2013: Expression of performance of electrochemical analyzers -- Part 4: Dissolved oxygen in water measured by membrane covered amperometric sensors
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 20245.4-2013 | English | 454 |
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Expression of performance of electrochemical analyzers -- Part 4: Dissolved oxygen in water measured by membrane covered amperometric sensors
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GB/T 20245.4-2013
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Basic data | Standard ID | GB/T 20245.4-2013 (GB/T20245.4-2013) | | Description (Translated English) | Expression of performance of electrochemical analyzers -- Part 4: Dissolved oxygen in water measured by membrane covered amperometric sensors | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N53 | | Classification of International Standard | 71.040.10 | | Word Count Estimation | 23,237 | | Quoted Standard | GB/T 20245.1-2006 | | Adopted Standard | IEC 60746-4-1992, 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 | The standard provides: solution for the determination of dissolved oxygen content sensors, analyzers and electronic unit Performance tests and factory made ??= requirements, terms and definitions. This standard applies to the use of Xiao membrane current | GB/T 20245.4-2013: Expression of performance of electrochemical analyzers -- Part 4: Dissolved oxygen in water measured by membrane covered amperometric sensors
---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 4.. Dissolved oxygen in water measured by membrane covered amperometric sensors
ICS 71.040.10
N53
National Standards of People's Republic of China
Performance of electrochemical analyzers
Part 4. The current-type film sensor
Dissolved oxygen
Part 4. Dissolvedoxygeninwatermeasuredbymembranecovered
(IEC 60746-4.1992, 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 Part of 420,245.
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 60746-4.1992 "performance of electrochemical analyzers - Part 4. The current film
Sensors measuring dissolved oxygen. "
This part of IEC 60746-4.1992 technical differences and their reasons are as follows.
a) Delete the international standard concentration units 3.4 ppm, ppb;
b) an increase in work 6.3.1 error part; because the international standard IEC 746-82 referenced content in 6.7.1, in
GB/T 20245.1-2006 (IEC 60746-1.2003, IDT) is not involved, it is supplemented by the legacy content.
For ease of use, this section made the following editorial changes.
--- GB/T 20245.4 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 ",". ",";
--- 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, Hangzhou condensing Environmental Protection Technology Co., Shanghai Electronics Shares have scientific instruments
Ltd., Sichuan-Chongqing Analytical Instruments Co., Ltd., China Institute of Metrology, Hailei magnetic sensor Technology Co., Ltd., Shanghai metering
Testing Technology Research Institute, Beijing Institute of Metrology detection, Beijing Institute for the Analysis instruments.
The main drafters of this section. Maya Juan, Mitsuhiro item, Wangqiao Mei, Li Xin, repair Hongyu, Wu Jianzhong, Ye Hong, Chen Zhengsheng, Louxing Jun.
Performance of electrochemical analyzers
Part 4. The current-type film sensor
Dissolved oxygen
1 Scope
This section GB/T 20245 specifies the performance test sensor for measuring dissolved oxygen content of the aqueous solution, and an electronic analyzer unit
Factory inspection requirements and proposed terms and definitions.
This section applies to the use of coating a current sensor for continuous monitoring of dissolved oxygen partial pressure or content analyzer, also suitable for measuring drinking
Water, water, industrial wastewater, sewage and storage tanks industrial processes (such as lakes, rivers, harbors water) of dissolved oxygen analyzer.
For discussion of the analyzer using a current sensor film is not fully applicable to the non-film electrochemical sensor, but can be used as a general reference
literature.
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)
3 Terms, definitions and symbols
GB/T 20245.1-2006 and as defined in the following terms, definitions and symbols apply to this document.
3.1 Symbol
pO2 --- vapor-liquid equilibrium under conditions of partial pressure of oxygen in the gas phase.
CO2 --- dissolved oxygen concentration in the solution.
3.2
Film Current Sensor membranecoveredamperometricsensors
Sensor generally comprises a cathode (typically manufactured material such as gold, silver or platinum) and an anode (manufactured material is typically silver or lead), Oxygen
The child is reduced at the cathode, reversible oxidation reaction at the anode; a suitable electrolyte; a suitable sensor for isolating and
To limit the spread of the polymer film of the test medium, the other function is to make the sensor electrode and an electrolyte and a number of normally present in water samples
Contaminants isolation. Coating may be a current type oxygen sensor cell may be a primary battery.
3.3 influence quantity
3.3.1
Temperature temperature
Temperature changes limit the proliferation of film oxygen permeability, which could affect performance coating current type oxygen sensor, which is a reversible over
Away. When the sample temperature changes, the solubility of oxygen in the sample will change, therefore, for direct reading instrument output density, through
Often take compensatory measures to compensate for the oxygen solubility with temperature changes.
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