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JJG 1044-2008 English PDF

US$369.00 · In stock
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JJG 1044-2008: Verification Regulation of Instrument for KF Coulometry Titration
Status: Valid

JJG 1044: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 1044-2008	English	369	Add to Cart	3 days [Need to translate]	Verification Regulation of Instrument for KF Coulometry Titration	Valid	JJG 1044-2008
JJG 1044-1993	English	RFQ	ASK	3 days [Need to translate]	Technical Specification of Measurement Assurance Pr-ogram for Activity of Re-dionuclides	Obsolete	JJG 1044-1993

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Basic data

Standard ID	JJG 1044-2008 (JJG1044-2008)
Description (Translated English)	Verification Regulation of Instrument for KF Coulometry Titration
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A61
Classification of International Standard	17.220
Word Count Estimation	16,188
Date of Issue	2008-09-27
Date of Implementation	2009-01-01
Quoted Standard	GB/T 7600-1987
Regulation (derived from)	?AQSIQ Announcement 2008 No.112;
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This standard applies to resolution no greater than 0. 5��m, the range of not more than 50mm of measuring the number of explicit instruction classes Calibrator and the value of not more than 10��m, the range of not more than 25mm mechanical gauges indicate class Calibrator initial verification, follow-up test and in-service inspection.

JJG 1044-2008: Verification Regulation of Instrument for KF Coulometry Titration

---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 Instrument for KF Coulometry Titration State verification procedures People's Republic of China Karl Fischer coulometry trace moisture analyzer Posted 2008-09-27 2009-01-01 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Karl Fischer coulometry trace moisture Analyzer test procedures Titration The regulations by the State Administration of Quality Supervision, Inspection and Quarantine approved on September 27, 2008, and from From January 1, 2009 implementation. Focal point. the National Technical Committee stoichiometric physical The main drafting units. Shandong Institute of Metrology Participated in the drafting unit. Zibo Kun Electronic Instrument Co., Ltd. This procedure commissioned the National Technical Committee of the stoichiometric physics responsible for the interpretation The main drafters of this procedure. Wang Yue new (Shandong Province Institute of Metrology) Richard Lam (Shandong Province Institute of Metrology) Wang (Shandong Province Institute of Metrology) Drafters participate. Zhao Wei (Zibo Kun Electronic Instrument Co., Ltd.)

1 Scope (1) 2. Referenced Documents (1) 3 Overview (1) 4 metering performance requirements (2) 4.1 Indication error (2) 4.2 Measurement repeatability (2) 4.3 Electrolytic speed (2) 4.4 Zero equilibrium time (2) 5 General Requirements (2) 5.1 appearance of the instrument (2) Cell systems 5.2 equipment (2) 5.3 instrumentation circuitry (2) 5.4 Display System (3) 5.5 safety indicators (3) 6 Control of measuring instruments (3) 6.1 Verification condition (3) 6.2 Verification Project (3) 6.3 Verification Methods (4) Processing 6.4 Verification Results (5) 6.5 test cycle (5) Calibration A micro syringe Appendix (6) Appendix B trace moisture analyzer test original records (7) Appendix C test certificate page format (9) Appendix D test results in the notice page format (10) Appendix E Karl Fischer reagent formulation (11) Karl Fischer coulometry trace moisture analyzer test procedures

1 Scope

The order applies to Karl Fischer (KarlFischer) coulometry trace moisture analyzer's initial verification, after Continued verification and in-service inspection, evaluation about the type of measurement performance requirements and test methods can refer to use.

2 Citations

GB/T 7600-1987 "in transformer oils - Determination of Moisture (coulometry)" When using this procedure, it should pay attention to using the currently valid version of the documents cited.

3 Overview

Karl Fischer coulometry trace moisture analyzer (hereinafter referred to as equipment) is mainly used to determine the petroleum, chemical, light Engineering, electricity, medicine, pesticides, environmental protection, geology, food and other industries in the moisture content of the product, it works as under. When the iodine oxidation of sulfur dioxide, will absorb moisture, Karl Fischer reagent (iodine, anhydrous pyridine dioxide Sulfur, a mixture of anhydrous methanol) and then reacted with water, the reaction end point is determined by electrode. Karl Fischer reagent with water-reactive chemical equation is. I2 SO2 3C5H5N H2 → O 2C5H5N · HI C5H5N · SO3 C5H5N · SO3 CH3 → OH C5H5N · HSO4CH3 As used Karl Fischer reagent solution by a certain concentration of elemental iodine and filled with dry pyridine sulfur dioxide, no Reagent mixing water or methanol from (see Appendix E), formed by electrolysis on the anode iodine, iodine and hydrogen reacts with water Periodic acid, the reaction until all the water has been completed. End of the reaction using a platinum electrode to detect the indication. During electrolysis, the electrode reaction as follows. Anode. 2I- → -2e I2 Cathode. I2 → 2e 2I- 2H → 2e H2 ↑ Throughout the process, the amount of sulfur dioxide substance consumed substances equal amount of water. Based on Faraday's law of electrolysis. M = nF Where. W --- moisture content of the sample, g; --- The M molar mass of water, g/mol; Q --- electrolysis power, C; --- Faraday constant F., C/mol; n --- the number of electron transfer. If the moisture content of the sample units taken μg, the molar mass of water taken 18g/mol, electrolytic power units take mC, France

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