JJG 748-2007 English PDF

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JJG 748-2007: Verfication Regulation of Oscilloscopic Polarograph
Status: Valid

JJG 748: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 748-2007	389	Add to Cart	3 days	Verfication Regulation of Oscilloscopic Polarograph	Valid
JJG 748-1991	439	Add to Cart	4 days	Verification Regulation of Oscilloscopic Polarograph	Obsolete

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Basic data

Standard ID: JJG 748-2007 (JJG748-2007)
Description (Translated English): Verfication Regulation of Oscilloscopic Polarograph
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A56
Classification of International Standard: 17
Word Count Estimation: 15,163
Date of Issue: 2007-02-28
Date of Implementation: 2007-08-28
Older Standard (superseded by this standard): JJG 748-1991
Quoted Standard: AQSIQ Announcement No. 41 of 2007
Regulation (derived from): AQSIQ Announcement No. 41 of 2007
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to the oscilloscope and very very spectrometer spectrometer spectrometer has a very functional part of the oscilloscope instrument of initial verification, testing and use of follow-up inspection.

JJG 748-2007: Verfication Regulation of Oscilloscopic Polarograph

---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.
Verfication Regulation of Oscilloscopic Polarograph State verification procedures People's Republic of China Oscilloscope Polarograph Posted 2007-02-28 2007-08-28 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Oscilloscope Polarograph test procedures Replacing JJG 748-1991 The regulations by the State Administration of Quality Supervision, Inspection and Quarantine on February 28, 2007 for approval and self From August 28, 2007 into effect. Focal point. the National Technical Committee stoichiometric physical The main drafting units. China Institute of Metrology Participated in the drafting. Qiqihar Medical College of Pharmacy This procedure commissioned the National Technical Committee of the stoichiometric physics responsible for the interpretation The main drafters of this procedure. Shinai Jie (China Institute of Metrology) Drafters participate. Zhang Rong (Qiqihar Medical College of Pharmacy)

table of Contents

1 Scope (1) 2 Overview (1) 3 metering performance requirements (1) 3.1 The detection limit (1) 3.2 measurement repeatability (1) 3.3 linear indication error (1) 3.4 Anti-first reduced physical capacity (1) 3.5 Resolution (2) 3.6 Current ratio (2) 4 General Requirements (2) 4.1 appearance and function check (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 (5) 5.5 test cycle (5) Appendix A test records (6) Appendix B test certificate page format (8) Appendix C test results in the notice page format (9) Appendix D test solution preparation (10) Oscilloscope Polarograph test procedures

1 Scope

The order applies to the oscilloscope and spectrometer pole pole pole oscilloscope spectrometer spectrometer having a functional part of the instrument's initial verification, Subsequent verification and in-service inspection.

2 Overview

Oscilloscope pole spectrometer (hereinafter referred to as equipment) is an electrochemical analytical instrument, mainly used to measure oxidation or solution Reducing the amount of substance. The instrument consists of two portions of the electrodes and the electronic unit. Its working principle is. electric control efforts Pole every drop of mercury growth cycle, so that the potential of each scan are new mercury drop. The working electrode and the auxiliary electrode plus On a quick change at any time intercropping linear voltage by measuring current and voltage curves, determine the peak voltage and peak The existence and size of the current, qualitative and quantitative analysis of the amount of oxidizing or reducing its substance. Schematic diagram of the instrument shown in Figure 1. Figure 1 Schematic oscilloscope Polarograph 1- sawtooth generator; 2- electrolytic cell; 3- vertical amplifier; 5- display and data processing section; 4- horizontal amplifier

3 metering performance requirements

3.1 The detection limit Cadmium (Ⅱ) detection limit of no more than 20μg/L. 3.2 Measurement repeatability Measurement repeatability is not more than 1%. 3.3 linear indication error Linear indication error absolute value is not more than 0.05mg/L. 3.4 Anti-first reduced physical capacity First anti-reducing material should be more than 5000.1. ......

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