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SN/T 2843-2011 English PDF

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SN/T 2843-2011: Test method for the gum percentage of raw silk
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Basic data

Standard ID SN/T 2843-2011 (SN/T2843-2011)
Description (Translated English) Test method for the gum percentage of raw silk
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard W40
Classification of International Standard 59.060.10
Word Count Estimation 5,576
Date of Issue 2011-02-25
Date of Implementation 2011-07-01
Quoted Standard GB/T 6682; GB/T 8170
Regulation (derived from) ?AQSIQ-Inspection [2011] 90
Issuing agency(ies) General Administration of Customs
Summary This standard specifies the method for the determination of raw silk with plastic rate. This standard applies to any specification of raw silk.

SN/T 2843-2011: Test method for the gum percentage of raw silk

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Test method for the gum percentage of raw silk People's Republic of China Entry-Exit Inspection and Quarantine Standards Silk Determination of gum content Issued on. 2011-02-25 2011-07-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China Exit Inspection and Quarantine Xiaoshan, Hangzhou, People's Republic of China Entry-Exit Inspection and Quarantine Bureau, People's Republic of China Ningbo Exit Inspection and Quarantine. The main drafters of this standard. Hu Wei, Wan Wang Jun, Pan Lulu, Yang Lisheng, Chen Yu, Tan Meng, ranking Pei Hua, Zhimin Xu. Silk Determination of gum content

1 Scope

This standard specifies the method for determination of raw silk with plastic rate. This standard applies to any specifications of raw silk.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. Laboratory use specifications and test methods GB/T 6682 Analysis GB/T 8170 repair value expressed about the rules and limit values and judgment Principle 3 Sericin not use alkali-resistant features, neutral soap or sodium carbonate were scouring of raw silk, raw silk by calculating the difference in weight before and after scouring the dry, draw Gum containing raw silk percentage.

4 Reagents

4.1 Industrial neutral soap solution. Weigh neutral industrial soap 10g, accurate to 0.01g, dissolved in 1000mL two water (see GB/T 6682), Formulated as a 10g/L solution of neutral soap industry. 4.2 Sodium carbonate solution. Weigh 0.5g of sodium carbonate (AR), accurate to 0.01g, dissolved in water 1000mL two configured 0.5g/L of carbon Sodium. 5. Apparatus 5.1 purple copper pots (length 840mm × width 285mm × height 310mm) or stainless steel pot (specifications are not limited, but at least meet 5L capacity). 5.2 Cleaning the pool. Open specifications to ensure clean quality prevail. 5.3 electric or gas stove. 5.4 Oven with balance. to control the temperature (105 ℃ ± 2 ℃); balance. accuracy 0.01g or more.

6 Test procedure

6.1 Sampling Take a representative sample of three, each about 10g, in which the two as samples, one as a backup sample. 6.2 dry weight before scouring The sample was placed in an oven (5.4), under the conditions of 105 ℃ ± 2 ℃ drying to constant weight, accurate to 0.01g.