GB/T 8943.2-2008 English PDF

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GB/T 8943.2-2008: Paper, board and pulp -- Determination of iron
Status: Obsolete

GB/T 8943.2: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 8943.2-2008	319	Add to Cart	3 days	Paper, board and pulp -- Determination of iron	Obsolete
GB/T 8943.2-1988	199	Add to Cart	2 days	Paper, board and pulp--Determination of iron content	Obsolete

Similar standards

GB/T 6546   GB/T 7979   GB/T 12914   GB/T 8941   GB/T 8944.1   

Basic data

Standard ID: GB/T 8943.2-2008 (GB/T8943.2-2008)
Description (Translated English): Paper, board and pulp -- Determination of iron
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y30
Classification of International Standard: 85.060
Word Count Estimation: 8,850
Date of Issue: 2008-01-04
Date of Implementation: 2008-09-01
Older Standard (superseded by this standard): GB/T 8943.2-1988
Quoted Standard: GB/T 462; GB/T 741; GB/T 742
Adopted Standard: ISO 779-2001, MOD
Regulation (derived from): National Standard Approval Announcement 2008 No.1 (Total No.114)
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 the determination of two sheets of iron content. Ie 1. 10 phenanthroline spectrophotometry and flame atomic absorption spectrometry (or plasma jet spectroscopy). This section applies to all kinds of paper, paperboard and pulp determination of iron content.

GB/T 8943.2-2008: Paper, board and pulp -- Determination of iron

---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.
Paper, board and pulps. Determination of iron ICS 85.060 Y30 National Standards of People's Republic of China Replacing GB/T 8943.2-1988 Paper, board and pulp iron content (ISO 779.2001, MOD) Posted 2008-01-04 2008-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 8943 is divided into four parts. --- GB/T 8943.1 "paper, board and pulp - Determination of copper content"; --- GB/T 8943.2 "paper, board and pulp - Determination of iron content"; --- GB/T 8943.3 "paper, board and pulp - Determination of manganese content"; --- GB/T 8943.4 "Paper, paperboard and pulp calcium and magnesium content determination." This section GB/T 8943 Part 2, corresponding to the international standards ISO 779.2001 "Paper, paperboard and pulp - Determination of iron content." This part is GB/T 8943.2-1988 "Pulp, paper and board - Determination of iron content," the amendment. The partial modification of international standards ISO 779.2001. This part of International Standard ISO 779.2001 compared to the following changes. --- Adding a new test method A (see Section 3 of this chapter). This part of ISO 779.2001 technical differences are listed in Appendix A. This part of ISO 779.2001 structure comparison are listed in Appendix B. This Part replaces GB/T 8943.2-1988. This portion of the GB/T 8943.2-1988 have compared the following changes. --- Increasing the normative references (see edition Chapter 2); --- Adding a new test method (see Chapter 4 of this edition); --- Adjust the reagent in the order (see this edition 3.2,4.2); --- Modify the contents of the instrument (see this edition 3.3); --- Adjust the sequence and content of the test procedure (see this edition 3.5,4.5,3.5.2.2). This section of the Appendices A and B are informative appendices. This part is proposed by the China National Light Industry Council. This part of the paper by the National Standardization Technical Committee (SAC/TC141) centralized. This part by the Tianjin Institute of Light Industry Technology Paper drafted. The main drafters of this section. Nie Jun red. This part of the standard replaces the previous editions are. --- GB/T 8943.2-1961, GB/T 8943.2-1981, GB/T 8943.2-1988. This part of the National Standardization Technical Committee is responsible for interpreting the paper industry. Paper, board and pulp iron content

1 Scope

GB/T 8943 provisions of this part of the test two methods of measuring the iron content of the paper, that is 1,10-phenanthroline spectrophotometry and flame Atomic absorption spectrometry (or a plasma jet spectroscopy). This section applies to the determination of a variety of paper, board and pulp iron content.

2 Normative references

The following documents contain provisions which, through GB/T reference in this 8943 constitute provisions of this part. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section. However, encouraged to reach agreement under this section All parties that proposed to use the latest versions of these documents, undated reference documents, the latest versions apply to this section. GB/T 462 Paper and board Determination of moisture (GB/T 462-2003, ISO 287. 1985, MOD) GB/T 741 Determination of pulp sample moisture (GB/T 741-2003, ISO 638. 1978, MOD) GB/T 742 paper, paperboard and pulp residue (ash) determination (900 ℃) (GB/T 742-2003, ISO 2144.1997, MOD) 3 Method A. 1,10- phenanthroline spectrophotometry 3.1 Principle Ashing the sample, and then the ash dissolved in hydrochloric acid, ferric chloride reduction of hydroxylamine (hydroxylamine hydrochloride). In a buffer solution medium, divalent Iron with 1,10-phenanthroline to form a complex at a wavelength of 510nm to this complex photometrically. 3.2 Reagents Unless otherwise indicated, the analysis should use the same analytical reagent and distilled water or purified water. 3.2.1 Sodium acetate trihydrate (NaCOOCH3 · 3H2O) solution. 540g/L. 3.2.2 hydrochloric acid solution. about 6mol/L. 3.2.3 0.1g/L standard iron solution Ⅰ. 0.100g of pure iron wire in 1000mL volumetric flask, dissolved in as little hydrochloric acid (density Of 1.19g/mL) in. Then diluted with water to the mark, and mix well. 1mL of this standard solution contains 0.1mg of iron. 3.2.4 0.01g/L standard iron solution Ⅱ. Pipette standard iron solution Ⅰ (3.2.3) 100mL to 1000mL volumetric flask, dilute with water to Scale and mix well. 1mL of this standard solution containing 0.01mg of iron. The solution is unstable, it should be day by day with. 3.2.5 hydroxylamine chloride (hydroxylamine hydrochloride) (HONH3Cl) solution. 20g/L. 3.2.6 hydrochloride 1,10 phenanthroline (C12H8N2 · HCl · H2O) solution. 10g/L. The reagent can be used a considerable amount of 1,10-phenanthroline instead. When storage solution, avoid light exposure. Note that only use a colorless solution. 3.3 Instrument General laboratory instruments and 3.3.1 spectrophotometer, or 3.3.2 photoelectric colorimeter equipped with a 500nm ~ 520nm in wavelength between the maximum transmittance of the filter and lid cuvette. 3.4 Sample Preparation The air-dried sample torn fragments of the appropriate size, it should not be used shearing, punching knives or other tools that may occur in the preparation of metal contamination sample. ......

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