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LY/T 1082-2021: Test method for analysis of raw materials and products of vegetable tannin extracts
Status: Valid LY/T 1082: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| LY/T 1082-2021 | English | 509 |
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Test method for analysis of raw materials and products of vegetable tannin extracts
| Valid |
LY/T 1082-2021
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| LY/T 1082-2008 | English | 479 |
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Test method for analysis of vegetable tannin extracts
| Obsolete |
LY/T 1082-2008
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| LY/T 1082-1993 | English | 479 |
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(Tannin test methods)
| Obsolete |
LY/T 1082-1993
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PDF similar to LY/T 1082-2021
Basic data | Standard ID | LY/T 1082-2021 (LY/T1082-2021) | | Description (Translated English) | Test method for analysis of raw materials and products of vegetable tannin extracts | | Sector / Industry | Forestry Industry Standard (Recommended) | | Classification of Chinese Standard | B72 | | Word Count Estimation | 22,257 | | Issuing agency(ies) | State Forestry and Grassland Administration | LY/T 1082-2021: Test method for analysis of raw materials and products of vegetable tannin extracts
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Test method for analysis of raw materials and products of vegetable tannin extracts
ICS 71:040:99
CCSB72
People's Republic of China Forestry Industry Standard
Replacing LY/T 1082-2008, LY/T 1083-2008
Test methods for raw materials and products of tannin extract
Published on 2021-06-30
2022-01-01 Implementation
Released by the State Forestry and Grassland Administration
directory
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Test conditions 1
5 Reagents or materials 1
6 Instruments 2
7 Sample 2
7:1 Sampling and sample preparation 2
7:1:1 Sampling and sample preparation of tannin extract raw materials 2
7:1:2 Sampling and sample preparation of finished tannin extract 2
7:1:3 Sampling of semi-finished products (extracts and gums) 3
7:2 Preparation of test solutions 3
7:2:1 Preparation of test solution from tannin extract raw material 3
7:2:2 Preparation of test solution 3 from semi-finished product (extract or thick glue)
7:2:3 Preparation of test solutions from finished products 3
8 Test procedure and data processing 4
8:1 Appearance 4
8:2 Moisture 4
8:2:1 Moisture (raw material) 4
8:2:2 Moisture (semi-finished and finished) 4
8:2:2:1 Test Step 4
8:2:2:2 Result calculation 4
8:3 Total extract4
8:3:1 Test Step 4
8:3:2 Result calculation 4
8:4 Insolubles 5
8:4:1 Test Step 5
8:4:2 Result calculation 5
8:5 Tannins5
8:5:1 Test Step 5
8:5:2 Result calculation 6
8:6 pH 6
8:7 Color 6
8:7:1 Test Step 6
8:7:2 Result calculation 7
8:8 Precipitation 7
8:8:1 Test Step 7
8:8:2 Result calculation 7
9 Test report8
Appendix A (normative) Preparation of tannin extract raw material test solution 9
Appendix B (informative) Sampling amount of several tannin extract raw materials12
Appendix C (Informative) The relationship between Baume degree and concentration of several tannin extract solutions 13
Appendix D (informative) Sampling amount of several powdered tannin extracts14
Appendix E (normative) Determination of chrome skin powder blank residue 15
Appendix F (Informative) Temperature Correction Coefficient (K) for Determining Precipitation of Several Tannin Extracts 16
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents"
drafted:
This document replaces LY/T 1082-2008 "Test method for analysis of tannin extract" and LY/T 1083-2008 "Test method for raw material analysis of tannin extract"
Law":
Compared with LY/T 1082-2008, the main technical changes of this document are as follows, except for editorial changes:
--- Modified the standard name and scope of application, and merged the analytical test method of tannin extract raw materials into this document;
--- Modified the expression of the calculation formula of insoluble content and precipitation;
--- Modified the normative Appendix E for the determination of the blank residue of chrome skin powder;
---Increased the sampling amount of Acacia tannin extract in "Appendix B":
This document is proposed by the State Forestry and Grassland Administration:
This document is under the jurisdiction of the National Standardization Technical Committee of Forest Chemical Products (SAC/TC558):
This document is drafted by: Forest Products Chemical Industry Research Institute, Chinese Academy of Forestry, Guangxi Wuming Tannin Extract Factory, Qinhuangdao City, Hebei Province Yun
Crown tannin extract Co:, Ltd:, Guangxi Baise Linhua General Plant:
The main drafters of this document: Wang Yongmei, Xu Man, Zhang Liangliang, Lu Mingzhao, Yan Xiuzhen, Xie Yunbo, Hu Xinyu:
The previous versions of this document and its superseded documents are as follows:
---LY/T 201-1972, GB/T 2615-1981;
---LY/T 1082-1993, LY/T 1082-2008;
---LY/T 1083-1993, LY/T 1083-2008:
Test methods for raw materials and products of tannin extract
1 Scope
This document specifies the test methods for various tannin extract raw materials, semi-finished products (extract and thick rubber) and finished products of tannin extract: The test items include water
Fractions, total extracts, insolubles, tannins, pH, color and precipitation:
This document is applicable to raw materials, semi-finished products and finished products of various tannin extracts:
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document:
GB/T 6284 General Method for Determination of Moisture in Chemical Products Loss on Drying Method
GB/T 6682 Analysis Laboratory Water Specifications and Test Methods
GB/T 9724 General rules for the determination of pH value of chemical reagents
LY/T 1639 chrome skin powder
3 Terms and Definitions
There are no terms and definitions that need to be defined in this document:
4 Test conditions
The temperature of the measurement environment should be 20°C ± 2°C:
5 Reagents or materials
Unless otherwise specified, the reagents used are of analytical grade, and the water is grade 3 water specified in GB/T 6682:
5:1 Gelatin:
5:2 Sodium chloride:
5:3 1% gelatin-sodium chloride solution: Dissolve 1 g of gelatin and 10 g of sodium chloride in about 50 mL of water (the water temperature does not exceed 60 °C): put the solution
Transfer to a 100mL volumetric flask, dilute to volume with water, shake well, and prepare as needed:
5:4 Kaolin: chemically pure, should meet the following requirements:
a) The soluble residue is less than 0:5g/kg: weigh 2g of kaolin clay sample and place it in a 250mL wide-mouth bottle, add:200mL of water, shake well, shake
After swirling for 10 min, filter with filter paper until clear, draw 100 mL of the filtrate into an evaporating dish with constant weight, evaporate to dryness, after constant weight, the residue
The amount should be less than 0:001g:
b) pH value 4:5~6:0: Weigh 1g of kaolin clay sample and disperse it in 100mL of water: After 5min, measure the test solution with a pH meter:
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