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JJG 950-2012 English PDF

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JJG 950-2012: Verification Regulation of Analyzers for Oil Content in Water
Status: Valid

JJG 950: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 950-2012English629 Add to Cart 5 days [Need to translate] Verification Regulation of Analyzers for Oil Content in Water Valid JJG 950-2012
JJG 950-2000English479 Add to Cart 4 days [Need to translate] Verification Regulation of Oil Content in Water Analyzers Obsolete JJG 950-2000

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Basic data

Standard ID JJG 950-2012 (JJG950-2012)
Description (Translated English) Verification Regulation of Analyzers for Oil Content in Water
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A60
Classification of International Standard 17.020
Word Count Estimation 27,266
Older Standard (superseded by this standard) JJG 950-2000
Adopted Standard ASTM D3921-1996, NEQ
Regulation (derived from) AQSIQ Announcement No. 96 of 2012
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to the principle of infrared spectrophotometry concentration of oil in water analyzer's initial verification, testing and use of follow-up checks.

JJG 950-2012: Verification Regulation of Analyzers for Oil Content in Water

---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.
Verification Regulation of Analyzers for Oil Content in Water State verification procedures People's Republic of China Oil in water concentration analyzer Issued on. 2012-06-18 2012-12-18 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Oil in water concentration analyzer Verification Regulation Analy Replacing JJG 950-2000 Focal point. the National Technical Committee on Environment stoichiometry Main drafting unit. Beijing Institute of Metrology detection Participated in the drafting unit. Beijing, Charcot a Instrument Technology Co., Ltd. Henan Institute of Metrology Foshan Analyzer Ltd. This procedure commissioned the National Technical Committee of the stoichiometric environment responsible for interpreting The main drafters of this procedure. Chen Zhengsheng (Beijing Institute of Metrology detection) Zhang Baozhu (Beijing Institute of Metrology detection) Drafters participate. Li Zi Cong (Beijing Institute of Metrology detection) Zhang Xinmin (Beijing, Charcot a Instrument Technology Co., Ltd.) Zhu Qian (Henan Institute of Metrology) Ye are one thousand (Foshan Analyzer Ltd.)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2 Overview (1) 3 metering performance requirements (1) 3.1 A class of instrument (1) 3.2 B class equipment (1) 4 General Requirements (2) 4.1 Appearance (2) 4.2 Insulation Resistance (2) 5 control of measuring instruments (2) 5.1 verification Conditions (2) 5.2 Verification Project (3) 5.3 Verification Methods (3) 5.4 Verification Results Processing (6) 5.5 test cycle (6) Appendix A test recording format (A type instrument) (7) Appendix B test recording format (Class B equipment) (9) Appendix C test certificate page format (A type instrument) (11) Appendix D test certificate page format (Class B instruments) (13) Appendix E test results in the notice page format (A type instrument) (15) Appendix F test results in the notice page format (B equipment category) (17) G carbon tetrachloride purification and testing methods Appendix (19)

Introduction

JJG 950-2012 is JJG 950-2000 revised version. Compared with JJG 950-2000, except Editorial changes outside the main technical changes are as follows. --- Increased introduction; --- This procedure is in accordance with the measured infrared GB/T 16488-1996 "water quality oil and animal and vegetable oils light Degree Law "oil in water concentration analyzer analysis methods were developed; --- Increased infrared spectrophotometry instrument test content; --- Added Appendix carbon tetrachloride purification and test methods; --- The procedures referenced ASTMD3921-96 "oil, grease and petroleum hydrocarbons in water Standard Test Law "(StandardTestMethodforOilandGreaseandPetroleumHydrocarbonsinWater). Oil in water concentration analyzer test procedures

1 Scope

The order applies to the principles of the water by infrared spectrophotometry oil concentration analyzer initial verification, use and subsequent verification Check.

2 Overview

Oil in water by infrared spectrophotometry concentration analyzer (hereinafter referred to as the oil content analyzer) is based on the molecules of the substance in the infrared region Characteristic absorption spectra and Lambert - Beer law, the extracted oil in water measurement points after the instrument. Water and oil through tetrachloride Carbon extraction in the wave number of 2930cm-1 (CH2 groups CH bond stretching vibration), 2960cm-1 (Stretching vibration CH3 groups CH bond) and 3030cm-1 (aromatic CH bond stretching vibration) All or part of the characteristic absorption bands, carbon tetrachloride extraction agent in the feature area no absorption peaks characteristic absorption material Mainly oil, animal and vegetable oils, and its content from the absorbance at the characteristic bands are calculated. Oil Analyzer into infrared spectrophotometry oil content analyzer (hereinafter referred to as Class A equipment) and non-dispersive infrared spectrophotometric measurement Oil meter (hereinafter referred to as Class B instruments) categories. A class instrument, you can wave number scanning, quantitative measurement of oil in multiple infrared absorption characteristics, such as the wave number 2930cm-1,2960cm-1 and characteristic peaks at 3030cm-1 is. Such equipment by using the experimental method is divided into Room, three kinds of portable and on-line. Class B instruments fixed wave number, usually only the feature 2930cm-1 absorption at 3.4μm or measured.

3 metering performance requirements

3.1 A class instrument 3.1.1 Indication error Measuring range ≤10mg/L, the indication error does not exceed ± 0.8mg/L; Measuring range > 10mg/L, the indication error does not exceed ± 8%. 3.1.2 Repeatability Not more than 2% repeatability. 3.1.3 Drift Laboratory equipment, portable instruments continuously running 30min, online instrument run continuously 3h, zero drift does not exceed Over ± 0.5mg/L, show drift of no more than ± 5%. 3.1.4 The minimum detectable concentration The minimum detectable concentration of not more than 0.5mg/L. 3.1.5 Effect of the supply voltage Using alternating current equipment, when the power supply voltage variation is within ± 10% of rated voltage, showing the value of the instrument error The difference shall meet the requirements of 3.1.1. 3.2 Class B instruments

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