GB/T 28025-2011 English PDF

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GB/T 28025-2011: Determination of the residual chlorine in products with filling materials -- Water extraction method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 28025-2011	139	Add to Cart	3 days	Determination of the residual chlorine in products with filling materials -- Water extraction method	Valid

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Basic data

Standard ID: GB/T 28025-2011 (GB/T28025-2011)
Description (Translated English): Determination of the residual chlorine in products with filling materials -- Water extraction method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: W59
Classification of International Standard: 59.080.99
Word Count Estimation: 6,689
Date of Issue: 2011-10-31
Date of Implementation: 2012-02-01
Quoted Standard: GB/T 6682; GB 18383
Regulation (derived from): Announcement of Newly Approved National Standards No. 15 of 2011
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 the water extraction method for the determination of residual chlorine with wadding method. This standard applies to products with wadding.

GB/T 28025-2011: Determination of the residual chlorine in products with filling materials -- Water extraction method

---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 the residual chlorine in products with filling materials. Water extraction method ICS 59.080.99 W59 National Standards of People's Republic of China With wadding chlorine test methods Water extraction method Issued on. 2011-10-31 2012-02-01 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 is proposed and managed by China Fiber Inspection Bureau. This standard was drafted. Fiber Inspection Bureau, Zhejiang Province. The main drafters of this standard. Shiyan Yan, Xu Qin, Yu Suying, the aftermath. With wadding chlorine test methods Water extraction method

1 Scope

This standard specifies the determination of water extraction with wadding in chlorine method. This standard applies to products with wadding.

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 18383 with wadding General technical requirements

3 Terms and Definitions

GB 18383 and defined by the following terms and definitions apply to this document. 3.1 Chlorine residualchlorine Product chlorine residual sum. Principle 4 With wadding extracted a certain time at 30 ℃ water bath after which the residual chlorine in the water can be extracted. Then the use of N, N- diethyl-p Phenylenediamine (DPD) with free chlorine in water color and fast response nature of its content was determined by spectrophotometry.

5 Reagents

Unless otherwise indicated, the reagents used in the analysis were of analytical grade and water for the three water GB/T 6682 regulations. 5.1 sulfuric acid. 5.2 Anhydrous disodium hydrogen phosphate (Na2HPO4). 5.3 anhydrous potassium dihydrogen phosphate (KH2PO4). 5.4 disodium edetate (Na2-EDTA). 5.5 N, N- diethyl-p-phenylenediamine hydrochloride [H2N · C6H4 · N (C2H5) 2 · 2HCl]. 5.6 N, N- diethyl-p-phenylenediamine sulfate [H2N · C6H4 · N (C2H5) 2 · H2SO4 · 5H2O]. 5.7 potassium permanganate (KMnO4), pure class distinctions. 5.8 phosphate buffer solution (pH6.5). Weigh 12.00g of anhydrous disodium hydrogen phosphate (5.2), 23.00g of anhydrous potassium dihydrogen phosphate (5.3) and 0.40g disodium edetate (5.4), mixed successively dissolved and diluted to 500mL. 5.9 N, N- diethyl-p-phenylenediamine (DPD) solution (1g/L). amount of 1mL of sulfuric acid (5.1) slowly inject the right amount of water, cooling, shake ......

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