GB/T 24991-2010Paper,board and pulps - Determination of lead content - Graphite furnace atomic absorption spectrometry method (English PDF)
纸、纸板和纸浆 铅含量的测定 石墨炉原子吸收法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
August 9, 2010
Implementation date
December 1, 2010
Scope
GB/T 24991-2010 is the English-translated version of 纸、纸板和纸浆 铅含量的测定 石墨炉原子吸收法.
GB/T 24991-2010 is the Chinese standard "Paper,board and pulps - Determination of lead content - Graphite furnace atomic absorption spectrometry method". Its scope clause reads: 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. Its clauses include reagents; instruments.
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Document preview — GB/T 24991-2010
National Standard of the People's Republic of China
- ICS
- 85.010
- Classification
- Y 30
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 4 Reagents
- 5 Instruments
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), rho = 1.40g/mL, the mass fraction is 65% to 68%.
4.3
Hydrogen peroxide (H2O2), rho = 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.
GB/T 24328.3-2020 | GB/T 27741-2018 | GB/T 31905-2015 | GB/T 24988-2020 | GB/T 24999-2018 | GB/T 24990-2010 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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