LY/T 1083-2008 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
LY/T 1083-2008	359	Add to Cart	3 days	Test method for analysis of raw materials of vegetable tannin extracts	Obsolete
LY/T 1083-1993	359	Add to Cart	3 days	(Tannin material test methods)	Obsolete

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Basic data

Standard ID: LY/T 1083-2008 (LY/T1083-2008)
Description (Translated English): Test method for analysis of raw materials of vegetable tannin extracts
Sector / Industry: Forestry Industry Standard (Recommended)
Classification of Chinese Standard: B72
Classification of International Standard: 71.040.99
Word Count Estimation: 9,951
Date of Issue: 2008-03-31
Date of Implementation: 2008-05-01
Older Standard (superseded by this standard): LY/T 1083-1993
Quoted Standard: GB/T 6682; GB/T 9724; LY/T 1082-2008; LY/T 1639-2005
Regulation (derived from): State Forestry Administration Announcement (Website)
Issuing agency(ies): State Forestry Administration
Summary: This standard specifies the various tannin extraction and analysis of raw materials test methods. This standard applies to all kinds of dry tannin raw materials.

LY/T 1083-2008: Test method for analysis of raw materials of vegetable tannin extracts

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Test method for analysis of raw materials of vegetable tannin extracts ICS 71.040.99 B72 People's Republic of China Forestry Industry Standard Replacing LY/T 1083-1993 Silicone raw material analysis test method Released on.2008-03-31 2008-05-01 implementation State Forestry Administration released

Foreword

This standard replaces LY/T 1083-1993 "Test Method for Silicone Raw Materials". Compared with LY/T 1083-1993, the main changes of this standard are as follows. --- The standard name was changed to "Test Method for Analysis of Silicone Raw Materials"; --- The title of Chapter 1 was changed to "Scope" and the content was modified; --- The title of Chapter 2 was changed to "normative reference document" and the content was modified and supplemented; --- Added Chapter 3 "Sampling"; --- The extraction rate of the raw material sample is specified in the measurement clause of "total extract"; --- Added the contents of Chapter 5 "Analysis Report" and canceled the original Appendix B. Appendix A of this standard is an informative annex. This standard is proposed and managed by the Institute of Chemical Industry of Forest Products of the Chinese Academy of Forestry. This standard is drafted by. Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry. Participated in the drafting of this standard. Inner Mongolia Sengong Rubber Products Co., Ltd., Guangxi Wuming Rubber Factory, Guangxi Baise Linhua General Factory. The main drafters of this standard. Chen Yuhong, Wu Dongmei, Wang Yumei, Wu Zaiyu. The previous versions of the standards replaced by this standard are. ---LY/T 201-1972; ---GB/T 2615-1981; ---LY/T 1083-1993. Silicone raw material analysis test method

1 Scope

This standard specifies the test methods for the extraction and analysis of various silicone raw materials. This standard applies to all kinds of silicone raw materials for air drying.

2 Normative references

The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard. GB/T 6682 Analytical laboratory water specifications and test methods GB/T 9724 Chemical reagent pH determination rules LY/T 1082-2008 Silicone Analysis Test Method LY/T 1639-2005 chrome skin powder

3 sampling

3.1 Sampling steps 3.1.1 Bark. first cut into 5cm size, then use the quadruple method to sample, at least 1kg. 3.1.2 Shell. such as rubber. Choose 2 times to 3 times per shift, choose 2kg~3kg each time, and choose 1kg by quadruple method. 3.2 Preparation of samples 3.2.1 The raw materials such as shells and bark that are taken are broken into small pieces with a wooden hammer, and then crushed through a 0.4cm sieve by a micro-plant mill. Plate, mix evenly. 3.2.2 Divide the sample into two parts, and put them into a clean, dry, jar with a grinder. The name of the raw material, the place of origin and Date of sampling. 1 for inspection and 1 for retention. 3.2.3 The sample should be inspected as soon as possible after it has been made. The retention period for the retained samples is 6 months.

4 Test methods

4.1 Moisture 4.1.1 Principle The sample was dried to constant weight at 105 ° C ± 2 ° C, and then the reduced mass of the sample was measured. 4.1.2 Instruments 4.1.2.1 Constant temperature drying oven. The temperature can be controlled at 105 °C ± 2 °C. 4.1.2.2 Analytical balance. Sensitivity 0.0001g. 4.1.2.3 Weighing bottle. inner diameter 4.5cm, height 2.5cm. 4.1.3 Analysis steps In the weighing bottle that has been weighed to constant weight, weigh 1g ~ 2g sample, weighed to 0.0001g, placed in a constant temperature drying oven at 105 °C ± 2 °C Dry for 2h. It was transferred to a desiccator and cooled for 30 min and then weighed. Repeat until constant weight. 4.1.4 Calculation of results The moisture is expressed in mass fraction X1, and the value is expressed in %, calculated according to formula (1). ......

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