GB/T 2915-2013 English PDF

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GB/T 2915-2013: Determination of conductivity of water extract of polyvinyl chloride resins
Status: Valid

GB/T 2915: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 2915-2013	149	Add to Cart	2 days	Determination of conductivity of water extract of polyvinyl chloride resins	Valid
GB/T 2915-1999	199	Add to Cart	2 days	Determination of conductivity of water extract of poly (vinyl chloride) Resins	Obsolete
GB/T 2915-1982	RFQ	ASK	3 days	Determination of conductivity of aqueous extract of polyvinyl chloride resins	Obsolete

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Basic data

Standard ID: GB/T 2915-2013 (GB/T2915-2013)
Description (Translated English): Determination of conductivity of water extract of polyvinyl chloride resins
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G32
Classification of International Standard: 83.080.20
Word Count Estimation: 5,516
Older Standard (superseded by this standard): GB/T 2915-1999
Regulation (derived from): National Standards Bulletin 2013 No. 17
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: a conductivity meter measuring the conductivity of aqueous extract of PVC resin methods.

GB/T 2915-2013: Determination of conductivity of water extract of polyvinyl chloride resins

---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.
Determination of conductivity of water extract of polyvinyl chloride resins ICS 83.080.20 G32 National Standards of People's Republic of China Replacing GB/T 2915-1999 Determination of polyvinyl chloride resin aqueous extract conductivity Issued on. 2013-09-06 2014-01-31 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard replaces GB/T 2915-1999 "PVC resin water extract conductivity measurement", and GB/T 2915-1999 phase Ratio, the main technical changes are as follows. --- The name was changed to "PVC resin aqueous extract conductivity measurement"; --- Remove the normative references (Chapter 2, 1999); --- Increased warnings; --- The "high water" to "deionized water" (see 5.1, Section 3, Chapter 6); --- Adjust the sample weight of deionized water and isopropyl alcohol and amount of precision, modify the cooling temperature of the aqueous extract (see Chapter 6); --- Added "If the two measured values \u200b\u200bare not greater than 2.0μS/(cm · g), then ignore the deviation, to calculate the average direct" requirement (See 7.2); --- The "coefficient of variation" instead of "relative standard deviation" represents repeatability and reproducibility of the method (see 7.2, 7.3). The standard reference ASTMD1755.2009 "Standard Specification for PVC resin" Chapter XIV "the conductivity of aqueous extract." The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee of plastic PVC resin product Technical Committee (SAC/TC15/SC7) centralized. This standard was drafted. Jinxi Chemical Industry Research Institute, Xinjiang Tianye (Group) Co., Ltd., Guangzhou Institute of Materials Co., Ltd. The main drafters of this standard. Tan Chen Lijuan, Shi Yang Qiu, Li Fang, Chenpei Yun, Wang Haojiang. This standard replaces the standards previously issued as follows. --- GB/T 2915-1982, GB/T 2915-1999. Determination of polyvinyl chloride resin aqueous extract conductivity Warning. Use of this standard should have practical experience in regular laboratory work. This standard does not point out all possible security asked question. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.

1 Scope

This standard specifies the electrical conductivity measured with a polyvinyl chloride resin aqueous extract conductivity method.

2 Terms and definitions

The following terms and definitions apply to this document. 2.1 Conductivity conductivity Side length 1cm cube solution between two relatively flat reciprocal exchanges resistance (ohms) value at a predetermined temperature, in the micro-Simon Each sub-centimeter (μS/cm). Principle 3 The aqueous dispersion of the resin is heated to a boil, resins ionic impurities in the water extract conductivity increased by comparing it with deionized The difference between the water conductivity to determine the conductivity of resin per unit mass of the aqueous extract.

4 Instrument

4.1 conductivity meter measurement range (0 ~ 2) S/cm, the accuracy of ± 1% (FS), with temperature compensation. Conductivity electrode 4.2, 0.1, 1, cell constant.

5 Reagents

5.1 deionized water, conductivity of no greater than 3μS/cm. 5.2 isopropanol, AR. Step 6 In previously with boiling deionized water twice conical flask was added 2.0g sample to the nearest 0.01g. Then added 5mL iso Propanol, shake flasks, so that the sample completely wet, and then 100mL deionized water added. Put a pan on the surface of the flask, the flask was placed On electric heating, boil 5min, cooled to room temperature. After sinking resin, the conductivity electrode into the conical flask of water extract, 30s after reading Take the conductivity of aqueous extract. At the same time a blank test. ......

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