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Program of Pattern Evaluation of On-line Automatic Determinators for Chemical Oxygen Demand (COD)
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JJF 1786-2019
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Basic data Standard ID | JJF 1786-2019 (JJF1786-2019) | Description (Translated English) | Program of Pattern Evaluation of On-line Automatic Determinators for Chemical Oxygen Demand (COD) | Sector / Industry | Metrology & Measurement Industry Standard | Classification of Chinese Standard | A61 | Classification of International Standard | 17.020 | Word Count Estimation | 26,215 | Date of Issue | 2019 | Date of Implementation | 2020-03-31 | Issuing agency(ies) | State Administration for Market Regulation |
JJF 1786-2019: Program of Pattern Evaluation of On-line Automatic Determinators for Chemical Oxygen Demand (COD) ---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.
Program of Pattern Evaluation of On-line Automatic Determinators for Chemical Oxygen Demand (COD)
National Measurement Technical Specification of the People's Republic of China
Chemical oxygen demand (COD) online automatic monitor
Type evaluation outline
Published on December 31,.2019
2020-03-31 Implementation
Issued by the State Administration of Market Supervision and Administration
Chemical oxygen demand (COD) online automatic
Outline of type evaluation of monitor
ChemicalOxygenDemand (COD)
Focal point. National Technical Committee for Environmental Chemometrics
Main drafting unit. Shandong Institute of Metrology
Jiangxi Metrology and Testing Institute
Shandong Environmental Monitoring Center Station
Participated in the drafting unit. China Institute of Test Technology
Qingdao Jiaming Measurement and Control Technology Co., Ltd.
This specification entrusts the National Environmental Chemometrics Technical Committee to interpret
The main drafters of this specification.
Sui Feng (Shandong Institute of Metrology)
Yang Yuzhe (Jiangxi Metrology and Testing Institute)
Liu Wei (Shandong Environmental Monitoring Center Station)
Participating drafters.
Yun Wang (Shandong Institute of Metrology)
Yuan Li (China Institute of Testing Technology)
Sen Zhang (Shandong Institute of Metrology)
Gao Xingang (Qingdao Jiaming Measurement and Control Technology Co., Ltd.)
table of Contents
Introduction (Ⅱ)
1 Scope (1)
2 References (1)
3 Terminology (1)
4 Overview (1)
5 Legal management requirements (1)
5.1 Requirements for units of measurement (1)
5.2 Logo (2)
6 Measurement requirements (2)
7 General technical requirements (2)
7.1 Appearance and power-on inspection (2)
7.2 Power environment adaptability (2)
7.3 Climate and environment adaptability (2)
7.4 Long-term stability (2)
8 List of Type Evaluation Items (3)
9 Provide the number of prototypes and how to use them (3)
9.1 Number of prototypes provided (3)
9.2 How to use the prototype (3)
10 Test methods and conditions of test items, data processing and qualification criteria (4)
10.1 Legal management requirements (4)
10.2 Measurement requirements (4)
10.3 General technical requirements (6)
11 Table of measuring instruments used in test items (9)
12 Judgment of type evaluation results (10)
13 Type evaluation record format (10)
Appendix A COD Standard Solution Preparation and Value Determination Method and Chloride Interference Test Solution Preparation Method (11)
Appendix B. Chemical Oxygen Demand (COD) Online Automatic Monitor Type Evaluation Record Format (12)
Introduction
This type evaluation outline is based on JJF 1016-2014 "Guidelines for Compiling Type Evaluation Outline of Measuring Instruments",
JJF 1015-2014 "General Specification for Type Evaluation of Measuring Instruments" was written.
The technical indicators of this type evaluation outline refer to JJG1012-2019 "Chemical Oxygen Demand (COD) Online Self
Dynamic monitor ", GB/T 32208-2015" chemical oxygen demand (COD) measuring instrument ", GB/T 11606-2007
Technical regulations and standards such as "Analytical Instruments Environmental Test Method".
This type evaluation outline is released for the first time.
Chemical oxygen demand (COD) online automatic monitor
Type evaluation outline
1 Scope
This type of evaluation outline is applicable to the measurement equipment classification code of 46361500 and measurement range (16 ~ 1000) mg/L
The evaluation of the type of chemical oxygen demand (COD) online automatic monitor.
2 Reference documents
This specification refers to the following documents.
GB/T 11606-2007 Environmental testing methods of analytical instruments
HJ828-2017 Water quality—Determination of chemical oxygen demand—Dichromate method
For dated reference documents, only the dated version applies to this specification; for those without date references
The latest version (including all amendments) is applicable to this specification.
3 Terminology
3.1 Chemical oxygen demand chemicaloxygendemand, COD
Under the condition of strong acid and heating, the amount of oxidant consumed when the water sample is treated with potassium dichromate as the oxidant.
The concentration (mg/L) to express.
3.2 memory effect
Also known as the residual effect, the effect of the instrument on the next measurement result after the determination of a standard solution or water sample.
4 Overview
The chemical oxygen demand (COD) online automatic monitor (hereinafter referred to as the instrument) is mainly used to detect domestic sewage,
The detection method of COD in industrial waste water and surface water is generally divided into potassium dichromate oxidation-redox drop
Determination method, potassium dichromate oxidation-spectrophotometry, potassium dichromate oxidation coulometric titration method, etc. The instrument consists of an automatic sampling unit,
It consists of oxidation reaction unit, detection unit, data processing unit and data transmission.
The key parts and materials of the instrument are shown in Table 1.
Table 1 Key parts and materials table
Remarks on the main performance indicators of the serial number project
1 Sampling unit --- according to design requirements
2 Digestion unit --- according to design requirements
3 Testing unit --- according to design requirements
5 Legal management requirements
5.1 Measurement unit requirements
The instrument should use the legal unit of measurement.
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