JJF 4.2-2010 English PDF
Basic dataStandard ID: JJF 4.2-2010 (JJF4.2-2010)Description (Translated English): Routine chemical components of tobacco and tobacco products, the continuous flow method for the determination of measurement the Uncertainty Evaluation Guide - Part 2: total alkali plants Sector / Industry: Metrology & Measurement Industry Standard Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine JJF 4.2-2010: Routine chemical components of tobacco and tobacco products, the continuous flow method for the determination of measurement the Uncertainty Evaluation Guide - Part 2: total alkali plants---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. Routine chemical components of tobacco and tobacco products, the continuous flow method for the determination of measurement the Uncertainty Evaluation Guide - Part 2. total alkali plants Ministry of People's Republic of China Metrology Technical Specifications JJF (Tobacco) 4.2-2010 Continuous flow of tobacco and tobacco products Determination of conventional chemical composition measurement uncertainty Degree assessment guide Part 2. Total alkaloids Released on.2010-12-27 2011-01-15 implementation National Tobacco Monopoly Bureau released Continuous flow of tobacco and tobacco products Determination of conventional chemical composition measurement uncertainty Degree assessment guide Part 2. Total alkaloids Part 2. TotalAlkaloids JJF (Tobacco) 4.2-2010 This specification was approved by the State Tobacco Monopoly Bureau on December 27,.2010, and since January.2011 Implemented on the 15th. Focal Point. National Tobacco Monopoly Bureau Main drafting unit. National Tobacco Quality Supervision and Inspection Center Shanghai Tobacco (Group) Co., Ltd. Shenzhen Tobacco Industry Co., Ltd. Shandong China Tobacco Industry Co., Ltd. Technology Center Qingdao Workstation Jiangsu Zhongyan Industry Co., Ltd. Xuzhou Cigarette Factory Hongyun Honghe Tobacco (Group) Co., Ltd. This specification is interpreted by the National Tobacco Standardization Technical Committee. JJF (Tobacco) 4.2-2010 The main drafters of this specification. Zhang Wei Flashing red light Participate in the drafters. Ma Yong Sui Dynasty Xu Ruyan Stone red geese Wang Lu Yang Yanping JJF (Tobacco) 4.2-2010 table of Contents1 Scope (1) 2 Citations (1) 3 Basic terms and concepts (1) 4 Mathematical models and uncertainty components (1) 5 synthetic standard uncertainty (6) 6 Extended uncertainty (6) Appendix A Standard Uncertainty Evaluation of Fitting Curve Parameters (7) JJF (Tobacco) 4.2-2010 Continuous flow of tobacco and tobacco products Determination of conventional chemical composition measurement uncertainty Degree assessment guide Part 2. Total alkaloids1 ScopeThe uncertainty assessment procedure provided by this specification is used to guide the continuous flow measurement of tobacco and tobacco products. Evaluation of the uncertainty of measurement of total plant alkali of chemical components.2 CitationsThis specification refers to the following documents. JJF 1059 Measurement Uncertainty Evaluation and Representation YC/T 31 Preparation of tobacco and tobacco product samples and moisture determination oven method YC/T 160 Tobacco and tobacco products - Determination of total alkaloids - Continuous flow method Use of this specification should be done with the current valid version of the above cited documents.3 basic terms and conceptsThe relevant terms and definitions given in JJF 1059, YC/T 31, and YC/T 160 apply to this specification.4 Mathematical models and uncertainty components4.1 Mathematical model of the measurement process From YC/T 160, the mathematical model of the total alkaloids of tobacco and tobacco products tested is shown in equation (1). TA=RT.A±RT.A× [urel(m)]2 [urel(W)]2 [urel(V)]2 [urel(C)]2 [urel(rep)]2 (1) In the formula. TA---total amount of plant alkali; RT.A---Measurement of total alkaloids; Urel(m)---the relative amount of influence introduced by sample quality measurement; Urel(W)---the relative amount of influence introduced by sample moisture measurement; Urel(V)--the relative amount of influence introduced by the volume measurement of the extract; Urel(C)---the relative amount of influence introduced by sample concentration measurement; Urel(rep)---Measures the relative amount of influence introduced by repeatability. 4.2 Uncertainty component evaluation 4.2.1 Uncertainty component introduced by sample quality measurement, urel(m) JJF (Tobacco) 4.2-2010 ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of JJF 4.2-2010_English be delivered?Answer: Upon your order, we will start to translate JJF 4.2-2010_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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