Standard Number: GB/T 10742-2008
Title: Raw fiber material - Determination of pectin content
Language: Simplified Chinese
Publication Date: 2008/8/19
Execute Date: 2009/5/1
Adopted International Standard: GB/T 2677.1;GB/T 2677.2;GB/T 6682
Standard Type: Method
International Classification for Standards (ICS)：
Publisher: Chinese Standards(GB)
Number of Pages:
Preface: Instead of this standard GB/T10742-1989 papermaking raw material pectin content determination. This standard and GB/T10742-1989 compared with the main changes are as follows: - increases the preface; - amend the reference standard to normative reference documents (1989 edition of the chapter 2, chapter 2 of this edition), Increases the reference standards; - changes the principle (in 1989 version 3.1; this version 3.1); - changes the reagent requirements (1989 edition of the 3.2; this version 3.2); - changed the instrument requirements (1989 edition of the 3.3; this version 3.3); - remove the 1 The 989 version of 3.4; - changes the test steps, the test process is divided into seven parts, and the individual steps are changed (in 1989 version 3.5; this version 3.4); - modified the calculation formula and results (in 1989 version 3.6; this version 3.5); - modified colorimetric method (1989 edition of the chapter 4, chapter 4 of this edition); - increased the test report (chapter 5 of this edition). This standard put forward by China light industry federation. This standard by the national paper industry standardization technical committee to review. This standard drafting unit: shenzhen entry-exit inspection and quarantine of the People's Republic of China? China's pulp made The paper research institute. Main drafter of this standard: hao-fei gu? Xu Rong? Yang ZuoJun? OuYangShan? ZhangYaLing. This standard replaced all previous releases of standard: GB/T10742-1989. This standard by the national paper industry standardization technical committee will be responsible for the explanation.
Description:This standard instead of gb/t 10742-1989 the papermaking raw material pectin content determination.
this standard specifies the determination methods of pectin content in paper making raw materials.
this standard applies to the determination of pectin content in all kinds of paper making raw materials.
this standard provides two methods for the determination of pectin content, namely the weight method and carbazole colorimetric method, two methods of measurement shall be equally authentic.
this standard and gb/t 10 742-1989 compared with the main changes are as follows:
- increases the preface;
--, amend the reference standard to normative reference file, add the reference standards;
- - changes the principle;
- modified reagents requirements;
- modified instrument requirements;
- deletes the 1989 edition of 3.4;
- modified the test steps , the test process is divided into seven parts, and the individual steps are changed;
--, modified the calculation formula and results;
- modified colorimetric method;
- increases the test report.
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Tile in English: Raw fiber material - Determination of pectin content