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GB/T 24991-2010: Paper, board and pulps -- Determination of lead content -- Graphite furnace atomic absorption spectrometry method
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 24991-2010 | English | 209 |
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Paper, board and pulps -- Determination of lead content -- Graphite furnace atomic absorption spectrometry method
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GB/T 24991-2010
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Basic data | Standard ID | GB/T 24991-2010 (GB/T24991-2010) | | Description (Translated English) | Paper, board and pulps -- Determination of lead content -- Graphite furnace atomic absorption spectrometry method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y30 | | Classification of International Standard | 85-010 | | Word Count Estimation | 9,985 | | Date of Issue | 2010-08-09 | | Date of Implementation | 2010-12-01 | | Quoted Standard | GB/T 450; GB/T 462; GB/T 740; GB/T 6682 | | Regulation (derived from) | National Standard Approval Announcement 2010 No.3 (Total No.158) | | 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 graphite furnace atomic absorption spectrometry paper, paperboard and pulp methods lead content. This standard applies to a variety of available nitrate wet digestion, including pulp containing recycled fibers, including, paper and paperboard. | GB/T 24991-2010: Paper, board and pulps -- Determination of lead content -- Graphite furnace atomic absorption spectrometry method
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Paper, board and pulps. Determination of lead content. Graphite furnace atomic absorption spectrometry method
ICS 85-010
Y30
National Standards of People's Republic of China
Paper, board and pulp lead content
Graphite Furnace Atomic Absorption Spectrometry
Paper, boardandpulps-Determinationofleadcontent-
Issued on. 2010-08-09
2010-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The Standard Appendix A, Appendix B is an informative annex.
The standard proposed by China National Light Industry Council.
The standard paper by the National Standardization Technical Committee (SAC/TC141) centralized.
This standard was drafted. SZCIQ Industrial Testing Center, China Pulp and Paper Research Institute, Shenzhen test
Quarantine Science Research Institute.
The main drafters of this standard. Xu Rong, Chen Xuhui, Guhao Fei, Chen Xiangyang, Yi Feng.
Paper, board and pulp lead content
Graphite Furnace Atomic Absorption Spectrometry
1 Scope
This standard specifies the graphite furnace atomic absorption spectrometry paper, board and pulp lead content.
This standard applies to all kinds of wet nitric acid is available, including those containing recycled fiber, including pulp, paper and paperboard.
The detection limit of this method was about 60μg/kg.
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 450 and take samples to an aspect of paper and paperboard samples, positive and negative determination (GB/T 450-2008, ISO 186.
2002, MOD)
GB/T 462 paper, board and pulp - Determination of water sample (GB/T 462-2008; ISO 287. 1985, MOD;
ISO 638. 1978, MOD)
GB/T 740 pulp samples taken (GB/T 740-2003, ISO 7213. 1981, IDT)
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
Principle 3
In a closed container, with nitric acid at high temperature and pressure conditions of the sample, diluted to give the sample, standard addition method using graphite furnace
Determination of lead content by atomic absorption.
4 Reagents
Unless otherwise indicated, used in the analysis confirmed only for the gifted class pure reagents.
4.1 Water, GB/T 6682, Grade 2.
4.2 Concentrated nitric acid (HNO3), ρ = 1.40g/mL, the mass fraction is 65% to 68%.
4.3 Hydrogen peroxide (H2O2), ρ = 1.11g/mL, the mass fraction of ≥30%.
4.4 matrix modifiers. the selection of the matrix modifier may be determined by a blank test, we recommend the following matrix modifier.
4.4.1 palladium nitrate stock solution, 0.4%, taking 2.0g of Pd (NO3) 2 was dissolved in 10mL of concentrated nitric acid (4.2), and then washed with water in capacity
Bottle diluted to 500mL. Valid for six months.
4.4.2 Work palladium nitrate solution, 200mg/L, taking 5mL palladium nitrate stock solution (4.4.1), dilute with water to 100mL. That solution with
Ready to use.
4.4.3 ammonium dihydrogen phosphate magnesium nitrate solution, 1% 0.06%, taking 1.0g of NH4H2PO4 and 0.06g of Mg (NO3) 2 ·
6H2O was dissolved in water and diluted to 100mL. With a solution that is ready to use.
4.5 lead standard stock solution, 100mg/L, weighed 0.1598g lead nitrate [Pb (NO3) 2] in a beaker, add a little water, then add
After 20mL of concentrated nitric acid (4.2) were dissolved, diluted with water to 1L. Solution was kept in a sealed polyethylene container. Valid for six months.
5 Instruments
Conventional laboratory equipment and the following.
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