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GB/T 27652-2011: Methods of pretreatment for chemical analysis of preservative-treated wood
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 27652-2011 | English | 139 |
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Methods of pretreatment for chemical analysis of preservative-treated wood
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GB/T 27652-2011
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Basic data | Standard ID | GB/T 27652-2011 (GB/T27652-2011) | | Description (Translated English) | Methods of pretreatment for chemical analysis of preservative-treated wood | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B71 | | Classification of International Standard | 79-010 | | Word Count Estimation | 6,650 | | Date of Issue | 2011-12-30 | | Date of Implementation | 2012-04-01 | | Quoted Standard | GB/T 1933 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 22 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 chemical analysis of wood preservative pretreatment of four ways: Hydrogen peroxide nitric acid digestion method, perchloric acid digestion method, microwave nitric acid digestion and hydrogen peroxide sulfuric acid bath method. This standard applies to the analysis of wood preservative arsenic, chromium, copper, phosphate pretreatment active ingredient content. Among them, microwave nitric acid digestion and hydrogen peroxide sulfuric acid bath method is suitable for atomic absorption spectroscopy, inductively coupled plasma atomic emission spectroscopy and atomic fluorescence spectrometer wood preservative active ingredient in the analysis of pretreatment. | GB/T 27652-2011: Methods of pretreatment for chemical analysis of preservative-treated wood---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.
Methods of pretreatment for chemical analysis of preservative-treated wood
ICS 79-010
B71
National Standards of People's Republic of China
Wood preservative chemical pretreatment prior to analysis
Issued on. 2011-12-30
2012-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The standard reference American wood preservative association AWPA Standard A7-05 "Wood chemical analysis before ashing procedures" and Australia
AS/NZS1605.2006 "wood preservatives and sampling and analytical methods embalmed material" to develop.
This standard was proposed by the State Forestry Administration.
This standard by the National Standardization Technical Committee timber.
This standard is drafted by. Guangdong Provincial Academy of Forestry.
Participated in the drafting of this standard. Guangdong Provincial Forest Products Quality Supervision, Inspection Station, the State Forestry Administration Forest Products Quality Inspection and Testing Center
(Guangzhou).
The main drafters of this standard. Chen Lifang, Zhang Yanjun, Su Haitao, Xiegui Jun, ranking Solutions Language, Li Xingwei.
Wood preservative chemical pretreatment prior to analysis
1 Scope
This standard specifies four methods for chemical analysis of wood preservative before pretreatment. hydrogen peroxide - nitric acid digestion method, perchloric acid digestion, micro
Wave - nitric acid digestion and hydrogen peroxide - dilute sulfuric acid water bath method.
This standard applies to the analysis of pre-treatment of wood preservative active ingredient content of arsenic, chromium, copper, phosphate and the like. Wherein the microwave - nitric acid digestion
Law and hydrogen peroxide - sulfuric acid in a water bath method is suitable for atomic absorption spectrometry, inductively coupled plasma emission spectroscopy and atomic fluorescence spectrometer
In the analysis of pretreatment wood preservative active ingredient ago.
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 1933 Wood Density Determination
Preparation 3 wood flour samples
3.1 Sampling
Wood preservative test samples shall be taken from a representative sample from the timber tip 300mm or more, the sampling site should avoid knots, open
And stress cracking wood. After determining the location, take the middle section of the cross section of wood or wood with hollow drill to drill wood core.
3.2 Determination of the density of wood preservative
Determination of the density of the wood samples by the method of GB/T 1933 regulations.
3.3 sample preparation
Crusher plants will get 3.1 wood preservative pulverized sample, taken through a 30 mesh standard sieve flour, baking at about 125 ℃
2.5h to constant weight.
4 hydrogen peroxide - nitric acid digestion method
4.1 instruments and equipment
Analytical balance (0.1mg), temperature controlled electric heating plate, 250mL or 500mL Kjeldahl flask, 100mL or 200mL volumetric flask.
4.2 Reagents
Concentrated nitric acid (70% AR), hydrogen peroxide solution (30% AR).
4.3 process
Accurately weigh about 5g (accurate to 0.1mg) by 3.3 prepared flour sample was placed in 250mL or 500mL Kjeldahl flask, bottle along
Concentrated nitric acid was slowly added wall 75mL fully wetted wood flour (wood flour equivalent per gram of sample was added 15mL of concentrated nitric acid), then add 3 to 5
Glass beads, a temperature-controlled flask was then placed on a hot plate heated slowly.
After the initial formation of brown smoke reaction, heating was continued until the solution becomes clear and transparent. Cool, was added dropwise 5mL peroxide
Hydrogen solution. If the treatment solution after digestion less than the above-described clear, 5mL was added dropwise hydrogen peroxide solution, heating was continued until the solution
Clear.
Depending on how much of the alleged mass sample digestion will be fully transferred to 100mL or 200mL volumetric flask, and diluted with distilled water
Volume.
Prepare a 250mL or 500mL empty Kjeldahl flask, with an equal amount of flour sample above digested acids and other reagents,
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