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GB/T 29905-2013: Laboratory method of determining the leachability of wood preservatives
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GB/T 29905-2013: Laboratory method of determining the leachability of wood preservatives

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Laboratory method of determining the leachability of wood preservatives ICS 79-010 B71 National Standards of People's Republic of China Test methods for wood preservatives wastage Issued on. 2013-11-12 2014-04-11 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard was proposed by the State Forestry Administration. This standard by the National Standardization Technical Committee timber (SAC/TC41) centralized. This standard was drafted. China Forestry Science Institute of Wood Industry. The main drafters of this standard. Jiang Mingliang, Li Zhiqiang. Test methods for wood preservatives wastage

1 Scope

This standard specifies the wood preservatives turnover laboratory test methods. This standard applies to all kinds of analysis of wood preservatives turnover rate.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 14019 wood preservative term GB/T 23229-type water-borne wood preservatives Analysis

3 Terms and Definitions

Terms and definitions GB/T 14019 apply to this document defined. 4 Prepare, embalmed and sample loss method Sample preparation 4.1 4.1.1 Sample choice of species Select Masson Pine (Pinusmassoniana) or slash pine (P.elliottii) species, according to need and select specific species should note Ming brief sample species origin and site conditions. 4.1.2 Sample Preparation It should be treated without chemicals healthy specimen, defect-free sapwood. Sample size. 20mm × 20mm × 20mm, the test Kind of ring width moderate, end of about four to six rings, between the sample density deviation does not exceed 15%. 4.2 embalmed 4.2.1 anti-corrosion treatment Each test preservatives choose to use two to four concentrations, the concentration of the test should be based on the target drug load may be, to give two to four drug the amount. Specimen before corrosion treatment should be individually numbered, dried and weighed. Samples under vacuum (-0.08MPa ~ -0.085MPa) into condition Row embalmed, processing time is 20min, the sample reached substantially saturated absorption liquid, remove the sample when using filter paper to gently wipe the surface of the liquid-free Weighing, for calculating the amount of the drug. Air-dry the sample to below 19% moisture content and stored at 20 ℃ ~ 28 ℃ environment. 4.2.2 Calculation of the total sample of wood preservative analyte mass Wood preservatives total mass of the sample under test component (m) according to equation (1). m = c × mG × 1000 (1) ...