JJG 877-2011 English PDFUS$419.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. JJG 877-2011: Verification Regulation of Vapor Pressure Osmometers Status: Valid JJG 877: Historical versions
Basic dataStandard ID: JJG 877-2011 (JJG877-2011)Description (Translated English): Verification Regulation of Vapor Pressure Osmometers Sector / Industry: Metrology & Measurement Industry Standard Classification of Chinese Standard: A53 Classification of International Standard: 17.100 Word Count Estimation: 18,147 Date of Issue: 2011-11-14 Date of Implementation: 2012-05-14 Older Standard (superseded by this standard): JJG 877-1994 Regulation (derived from): AQSIQ Announcement No. 165 of 2011 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine Summary: This standard applies to the determination of the number-average molar mass at 1 �� 10000g �� mol-1 below the vapor pressure of the polymer permeability tester (also known as gas osmotic device, referred to as VPO) of the initial verification, testing and use of follow-up checks. JJG 877-2011: Verification Regulation of Vapor Pressure Osmometers---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 Vapor Pressure Osmometers State verification procedures People's Republic of China Vapor pressure osmometer Issued on. 2011-11-14 2012-05-14 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Vapor Pressure Osmometer verification procedures Vap Replacing JJG 877-1994 The regulations by the State Administration of Quality Supervision, Inspection and Quarantine on November 14, 2011 for approval and self From May 14, 2012 into effect. Focal point. the National Technical Committee stoichiometric physical The main drafting units. China Institute of Metrology Participated in the drafting. Leipzig letter (China) Technology Development Co., Ltd. This procedure commissioned the National Technical Committee of the stoichiometric physics responsible for the interpretation The main drafters of this procedure. Qi Xin (China Institute of Metrology) Repair Hongyu (China Institute of Metrology) Drafters participate. Liu member (Leipzig letter (China) Technology Development Co., Ltd.) table of Contents1 Scope (1) 2 Overview (1) 3 metering performance requirements (1) 4 General Requirements (2) 4.1 Visual inspection (2) 4.2 boot check (2) 5 control of measuring instruments (2) 5.1 verification Conditions (2) 5.2 test equipment and certified reference materials (2) 5.3 test items and test methods (2) 5.4 test results processing (4) 5.5 test cycle (4) Appendix A instrument parameters (K) calibration method (5) Appendix B solution preparation concentration range table (7) Appendix C of polystyrene and dextran CRMs solution preparation method (8) Appendix D vapor pressure osmometry common solvents suitable measuring temperature and concentration range reference table (9) Appendix E Vapor Pressure Osmometer test record format (11) Vapor Pressure Osmometer verification procedures1 ScopeThe order applies to the determination of the number average molar mass in 1 × 104g · mol-1 or less polymer vapor pressure osmometry (Also known as vapor pressure osmometer, Acronym VPO) initial verification, use and subsequent verification check.2 OverviewVapor pressure osmometer is determined on the basis of a non-volatile solvent vapor high pressure drop caused by the principles of solute in solution Number-average molar mass of the copolymer Mn. There are two good matches thermistor probe in the instrument, placed in a sealed constant Warm, filled with some kind of saturated vapor pond pure solvent. When the same pure solvent drops are hanging on the two thermistor probes When, due to the vapor pressure of the solvent is the same, no solvent vapor condensation heat generation, thus reflecting the two thermistor temperature probes Difference is zero. If one drops a thermistor probe was replaced with a solution containing the same solvent, since the solvent of the solution was evaporated Low pressure, solvent molecules will gather from the saturated vapor phase into the solution drops, release condensation heat, the temperature of the solution drops Increased. At equilibrium, the temperature difference between the two thermistor probes generated. This difference can be converted into an instrument electronic measuring system Response amount, and solute response number-average molar mass (Mn), there is a relationship between the concentration (ci). That is an inherent value in response to different concentrations (Δdi/ci) for the vertical axis, concentration (ci) as the abscissa, plotted and Get a straight line. Linear intercept (Δdi/ci) c → 0 by extrapolation, calculated by the formula (1) obtained. Δdi ic → 0 = KMn (1) Mn = KΔdi ic → 0 (2) Where. K --- instrument parameters; --- Number of Mn average molar mass of the sample; ci --- concentration; Δdi --- response temperature difference value; Δdi ic → 0 --- Value inherent response.3 metering performance requirementsPerformance measurement instrumentation requirements are listed in Table 1. Table 1 metrological requirements No. test items measured performance indicators 1 instrument sensitivity inspection > 100 value 2 measuring chamber temperature indication error does not exceed ± 0.2 ℃ ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of JJG 877-2011_English be delivered?Answer: Upon your order, we will start to translate JJG 877-2011_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of JJG 877-2011_English with my colleagues?Answer: Yes. The purchased PDF of JJG 877-2011_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. 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Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
