GB/T 28724-2012 English PDFUS$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 28724-2012: Determination of melting temperature for chemicals (pharmaceuticals) -- Differential scanning calorimetry (DSC) Status: Valid
Basic dataStandard ID: GB/T 28724-2012 (GB/T28724-2012)Description (Translated English): Determination of melting temperature for chemicals (pharmaceuticals) -- Differential scanning calorimetry (DSC) Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G04 Classification of International Standard: 71.040.01 Word Count Estimation: 6,674 Quoted Standard: ASTM E967 Regulation (derived from): National Standards Bulletin 2012 No. 24 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies the differential scanning calorimetry melting point of principle, equipment, analytical procedures, test reports and accuracy. This standard applies to the thermal stability of a clear melting point melting point determination of o GB/T 28724-2012: Determination of melting temperature for chemicals (pharmaceuticals) -- Differential scanning calorimetry (DSC)---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. ICS71.040.01 G04 National Standards of People's Republic of China Determination of the melting point of the solid organic chemicals Differential scanning calorimetry Issued on. 2013-02-01 2012-09-03 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis standard rule according to GB/T 1.1-2009 given draft. The standard reference method using redrafted ASTM E794.2006 "Standard Test Method for Determination of thermal analysis melting point and crystallization point" preparation. This standard Using only one standard test method for melting, crystallization point is not stated. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee Chemistry (SAC/TC63) centralized. This standard was drafted. Shandong Provincial Academy of Inspection and Quarantine Science and Technology, Shandong Exit Inspection and Quarantine, Guangdong Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard. Lin Yu Fei, Wang Yan, Sun Jian, high-Mei, with Liu, Cai hair, Chengu Feng, Ji Lei, Duheng Qing, HE Fei, Yang Sheng eagle, Harpole. Determination of the melting point of the solid organic chemicals Differential scanning calorimetry Warning. The specimen may produce harmful and corrosive gases in the molten state, laboratory personnel should have sufficient understanding of the sample, to avoid people Staff and equipment causing damage.1 ScopeThis standard specifies the principle of differential scanning calorimetry melting point determination, equipment, analysis step, test reports and precision. This standard applies to have a clear melting point of the thermal stability of the melting point of organic chemicals.2 Normative referencesThe following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. For undated references, the latest edition (including any amendments) applies to this document. ASTME967 differential scanning calorimeter and temperature calibration standard methods of differential thermal analyzer Principle 3 Measured by Temperature Programmed rate of heat flow difference between the sample and reference substances melting enthalpy curve of the sample, make enthalpy curve group Line, the baseline and the tangent enthalpy curve start melting zone extends intersect, the intersection of the melting point.4 Instrument4.1 differential scanning calorimeter, including the following sections. a) differential scanning calorimetry pool. In the test temperature range of the sample and the reference were heated to stabilize the rate of temperature rise, and a temperature sensor Thermal (accuracy 0.01 ℃) and differential heat flow rate sensor (precision 1μW) monitoring the temperature of the sample and the sample and reference material between Flow rate differential can provide 10mL/min ~ 50mL/min (flow rate accuracy of 1mL/min) of an inert gas such as nitrogen; b) temperature control device. Can the sample of at least 10 ℃/min heating rate stable and has sufficient precision heating (Temperature Accuracy 0.01 ℃/min). 4.2 Sample dish. sealed sample cell, the sample according to the sample case chose not to react with the sample cell. 4.3 Pressure Prototype. seal pressure can be like. 4.4 Analysis of balance. weighing accuracy of 0.01mg.5 Sample5.1 specimens should be uniform and representative of the test sample. 5.2 Avoid grinding and similar operations, such as the presence of mechanical and heat treatment before being measured shall be recorded in the final report. The samples should be heat-treated Weigh loss. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 28724-2012_English be delivered?Answer: Upon your order, we will start to translate GB/T 28724-2012_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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