GB/T 22401-2008 English PDF

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GB/T 22401-2008: Photography -- Processing chemicals -- Specifications for anhydrous sodium metabisulfite
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22401-2008	154	Add to Cart	3 days	Photography -- Processing chemicals -- Specifications for anhydrous sodium metabisulfite	Valid

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Basic data

Standard ID: GB/T 22401-2008 (GB/T22401-2008)
Description (Translated English): Photography -- Processing chemicals -- Specifications for anhydrous sodium metabisulfite
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G84
Classification of International Standard: 37.040.30
Word Count Estimation: 8,818
Date of Issue: 2008-10-10
Date of Implementation: 2009-06-01
Quoted Standard: GB/T 20432.1-2006; GB/T 20432.5-2007; GB/T 20432.9-2007
Adopted Standard: ISO 3627-2001, IDT
Regulation (derived from): National Standard Approval Announcement 2008 No.17 (Total No.130)
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 test methods for photographic grade anhydrous sodium metabisulfite chemical purity requirements and test purity.

GB/T 22401-2008: Photography -- Processing chemicals -- Specifications for anhydrous sodium metabisulfite

---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.
Photography. Processing chemicals. Specifications for anhydrous sodium metabisulfite ICS 37.040.30 G84 National Standards of People's Republic of China GB/T 22401-2008/ISO 3627.2001 Photography - Processing chemicals Anhydrous sodium metabisulfite (ISO 3627.2001, IDT) Posted 2008-10-10 2009-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is identical with ISO 3627.2001 "photographic processing chemicals --- --- anhydrous sodium metabisulphite Specifications" (in English). This standard is equivalent translation ISO 3627.2001. For ease of use, this standard made the following editorial changes. --- "This International Standard" or "ISO 3627" to "this standard"; "." --- With a decimal point instead of a comma as the decimal point, ""; --- Delete ISO 3627.2001 Foreword Introduction; --- International standards set forth in Chapter 2, "Normative references" instead equivalents translate national standards. Please note that some of the content of this standard may involve patents, the issuing authority of this standard should not bear the responsibility to identify these patents. The standard proposed by China Petroleum and Chemical Industry Association. The photosensitive material standard by the National Standardization Technical Committee (SAC/TC102) centralized. This standard was drafted. China Lucky Film Group Corporation Baoding Lucky Chemical Co., photography. Drafters of this standard. Jingbo places. GB/T 22401-2008/ISO 3627.2001 Photography - Processing chemicals Anhydrous sodium metabisulfite

1 Scope

This standard specifies the test method for level Photographic Chemicals anhydrous sodium metabisulfite purity requirements and test purity.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 20432.1-2006 Photographic grade chemicals - Test methods - Part 1. General (ISO 10349-1.2002, IDT) Determination of heavy metals and iron content. GB/T 20432.5-2007 Photographic grade chemicals - Test methods - Part 5 (ISO 10349-5.1992, IDT) Part 9 GB/T 20432.9-2007 Photographic grade chemicals - Test method. Reaction of silver nitrate and ammonia solution (ISO 10349-9.1992, IDT)

3 Overview

3.1 Physical properties Anhydrous sodium metabisulfite (Na2S2O5) as a white or light cream colored particles, relative molecular mass of 190.10. 3.2 Hazard Anhydrous sodium metabisulfite no risk in taking the usual protection operation, avoid contact with acids. 3.3 HANDLING AND STORAGE Anhydrous sodium metabisulfite should be stored in closed containers at room temperature.

4 Requirements

Requirement in Table 1. Table 1 Requirements Project Test Limit Test Standard Terms Content /% ≥ 95.0 7.1 This standard The mass fraction of heavy metals (Pb) /% ≤ 0.005 7.2 GB/T 20432.5-2007 The mass fraction of iron (as Fe) /% ≤ 0.005 7.3 GB/T 20432.5-2007 The reaction of ammonia and silver nitrate solution qualified 7.4 GB/T 20432.9-2007 pH value of 3.7 to 4.6 7.5 Standard Thiosulfate mass fraction (in S2O2-3 meter) /% ≤ 0.03 7.6 This standard Appearance transparent solution without insolubles (except micro floc) 7.7 standard

5 Reagents and glassware

Unless otherwise specified, all reagents, glassware and materials shall comply with GB/T 20432.1-2006 requirements. Detailed operation step GB/T 22401-2008/ISO 3627.2001 ......

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