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GB/T 37838-2019 English PDF

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GB/T 37838-2019: Pulp - Determination of dynamic viscosity number in cupri-ethylenediamine (CED) solution
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 37838-2019	English	119	Add to Cart	3 days [Need to translate]	Pulp - Determination of dynamic viscosity number in cupri-ethylenediamine (CED) solution	Valid	GB/T 37838-2019

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Basic data

Standard ID	GB/T 37838-2019 (GB/T37838-2019)
Description (Translated English)	Pulp - Determination of dynamic viscosity number in cupri-ethylenediamine (CED) solution
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	Y30
Classification of International Standard	85.010
Word Count Estimation	6,647
Date of Issue	2019-08-30
Date of Implementation	2020-03-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 37838-2019: Pulp - Determination of dynamic viscosity number in cupri-ethylenediamine (CED) solution

---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.
Pulp - Determination of dynamic viscosity number in cupri-ethylenediamine(CED) solution ICS 85.010 Y30 National Standards of People's Republic of China Pulp copper ethylene diamine (CED) solution Determination of dynamic viscosity Published on.2019-08-30 2020-03-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This standard was proposed by the China Light Industry Association. This standard is under the jurisdiction of the National Paper Industry Standardization Technical Committee (SAC/TC141). This standard was drafted. South China University of Technology, Shenzhen Institute of Inspection and Quarantine, China Pulp and Paper Research Institute Co., Ltd., the country Paper Products Quality Supervision and Inspection Center. The main drafters of this standard. Wu Shubin, Gu Haofei, Wang Bo, Chen Chunxia, Xu Wei, Cheng Hao, Zhao Yuanyuan. Pulp copper ethylene diamine (CED) solution Determination of dynamic viscosity

1 Scope

This standard specifies the principle of determination of the dynamic viscosity of pulp in copper ethylene diamine (CED) solution, calibration of reagents, instruments, viscometers, and tests. Sample preparation, test procedures, calculations, test reports. This standard applies to a variety of pulp that can be completely dissolved in copper ethylene diamine solution.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 462 Determination of moisture in paper, paperboard and pulp analysis samples Determination of intrinsic viscosity value of GB/T 1548 pulp copper ethylene diamine (CED) solution GB/T 6682 Analytical laboratory water specifications and test methods

3 Terms and definitions

The following terms and definitions as defined in GB/T 1548 apply to this document. 3.1 Dynamic viscosity dynamicviscosity The proportionality between the friction between the two layers of liquid and the velocity gradient as the fluid flows. Note. expressed by the symbol η, the unit is millipascal seconds (mPa·s).

4 Principle

A certain amount of pulp dry sample is dissolved in copper ethylene diamine solution, the density of the solution is measured at 20 ° C and passed through the capillary The flow time of the viscometer is calculated from these measured values, and is expressed in mPa·s.

5 reagent

Unless otherwise stated, reagents identified as analytically pure should be used in the analysis. 5.1 Water, GB/T 6682, Level 3. 5.2 Copper ethylenediamine solution, concentration c (CED) = (1.00 ± 0.02) mol/L, containing 1.0 mol of copper and 2.0 mol of ethylene per liter of solution amine. The solution should be prepared and calibrated in accordance with the provisions of GB/T 1548. 5.3 A certified standard viscosity solution or a solution of known kinematic viscosity with an accurate kinematic viscosity at 20 °C. 5.4 Nitric acid solution, φ (HNO3) = 5% (volume fraction). 5.5 Acetone, CH3COCH3.

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