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JJF 1822-2020 English PDF

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US$369.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1822-2020: Calibration Specification for Urea Analyzers of Water Sample Detection
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1822-2020	369	Add to Cart	4 days	Calibration Specification for Urea Analyzers of Water Sample Detection	Valid

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Basic data

Standard ID: JJF 1822-2020 (JJF1822-2020)
Description (Translated English): Calibration Specification for Urea Analyzers of Water Sample Detection
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A60
Classification of International Standard: 17.020
Word Count Estimation: 16,183
Date of Issue: 2020
Date of Implementation: 2020-04-17
Issuing agency(ies): State Administration for Market Regulation

JJF 1822-2020: Calibration Specification for Urea Analyzers of Water Sample Detection

---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.
Calibration Specification for Urea Analyzers of Water Sample Detection National Measurement Technical Specification of the People's Republic of China Calibration specification of urea detector for water sample detection 2020-01-17 release 2020-04-17 Implementation Issued by the State Market Supervision Administration Urea detector for water sample detection Calibration specifications Focal point. National Biometrics Technical Committee Main drafting unit. Shanghai Institute of Measurement and Testing Technology Participated in the drafting unit. China Academy of Metrology This specification entrusts the National Biometrics Technical Committee to interpret The main drafters of this specification. Ding Min (Shanghai Institute of Metrology and Testing Technology) Xu Qin (Shanghai Institute of Metrology and Testing Technology) Participating drafters. Gao Yunhua (Chinese Academy of Metrology) Gang Liu (Shanghai Institute of Metrology and Testing Technology)

Introduction (Ⅱ) 1 Scope (1) 2 References (1) 3 Overview (1) 4 Measurement characteristics (1) 5 Calibration conditions (1) 5.1 Environmental conditions (1) 5.2 Standard materials, reagents and instruments for calibration (2) 6 Calibration items and calibration methods (2) 6.1 Stability (2) 6.2 Indication error (2) 6.3 Measurement repeatability (2) 7 Expression of calibration results (3) 8 Recalibration time interval (3) Appendix A Method for preparing calibration standard solution (4) Appendix B Reference Format for Calibration Record of Urea Tester (5) Appendix C Examples of Uncertainty Evaluation of Indication Error Measurement Results (6) Appendix D. Internal Format of Calibration Certificate (10)

Introduction

This specification is written in accordance with the requirements of JJF 1071-2010 "Rules for Compiling National Measurement and Calibration Specifications". This specification refers to JJG179-1990 "filter photoelectric colorimeter" and JJF 1059.1-2012 "measurement uncertainty" Degree evaluation and expression "formulation. This specification is the first release. Calibration specification of urea detector for water sample detection

1 Scope

This specification applies to the calibration of water sample urea detectors based on the principle of colorimetry.

2 Reference documents

JJF 1071-2010 Compilation Rules for National Measurement and Calibration Specifications GB/T 6682-2008 Analytical laboratory water specifications and test methods 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 Overview

The urea detector for water sample detection (hereinafter referred to as the instrument) uses the colorimetric principle to detect the urea content in the water sample Measurement. The urea in the water sample reacts with the matching reagent to develop a color, and the degree of color development within a certain range is related to the urea in the tested sample. The content is proportional, and the urea content of the sample is calculated according to the absorbance value of the coloring solution. There are three main principles of color reaction. The first is the diacetyl-oxime-antipyrine method. Under strong acid and heating conditions, urea and diacetyl-oxime-an The reaction of tepirin is yellow, with a maximum absorption peak at a wavelength of about 460nm. The linear range of the method is (0.5 ~ 10) mg/L. The second is the sodium dichloroisocyanurate-thymol method, in the presence of soluble starch, urea can be combined with dichloroisocyanurate The reaction of sodium urea and thymol produces a yellow compound with a maximum absorption wavelength of about 470nm. square The normal linear range is (0.5 ~ 5) mg/L. The third is the urease blue method. The ammonia nitrogen generated when urease hydrolyzes urea is used to neutralize sodium phenolate and secondary in a strong alkaline medium. The sodium chlorate reacts to form a blue-green compound with a maximum absorption wavelength of about 610nm. The line of urea solution in this reaction The sex range is (0.1 ~ 2.5) mg/L. In order to meet the needs of use, the detection range of urea can be reached through sample dilution To (0.1 ~ 5) mg/L. The instrument is mainly composed of light source, monochromator, sample room, detector, data processing, display unit and matching reagents, etc. composition.

4 Measurement characteristics

4.1 Stability 4.2 Indication error 4.3 Measurement repeatability

5 Calibration conditions

5.1 Environmental conditions ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1822-2020_English be delivered?

Answer: Upon your order, we will start to translate JJF 1822-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1822-2020_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1822-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.