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GB/T 28025-2011: Determination of the residual chlorine in products with filling materials -- Water extraction method
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 28025-2011 | English | 139 |
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Determination of the residual chlorine in products with filling materials -- Water extraction method
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GB/T 28025-2011
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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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