BS 46-1 pdf free download
BS EN 46-1-2016 pdf free download.Wood preservatives – Determination of the preventive action against recently hatched larvae of Hylotrupes bajulus (Linnaeus) – Part 1: Application by surface treatment (laboratory method).
This European Standard specifies a method for the determination of the preventive action of a wood preservative against recently hatched larvae of Hylotrupes bajulus (Linnaeus) when the preservative is applied as a surface treatment to wood. This method is applicable to:
— water-insoluble chemicals which are being studied as active insecticides;
— organic formulations, as supplied or as prepared in the laboratory by dilution of concentrates;
— organic water-dispersible formulations as supplied or as prepared in the laboratory by dilution of concentrates; and
— water-soluble materials, for example salts. The method is applicable whether or not the test specimens have been subjected to appropriate ageing procedures.
2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 73, Wood preservatives
— Accelerated ageing of treated wood prior to biological testing
— Evaporative ageing procedure EN 84, Wood preservatives
— Accelerated ageing of treated wood prior to biological testing
— Leaching procedure EN ISO 3696, Water for analytical laboratory use
— Specification and test methods (ISO 3696)
3 Terms and definitions For the purposes of this document, the following terms and definitions apply.
3.1 representative sample sample having its physical and/or chemical characteristics identical to the volumetric average characteristics of the total volume being sampled [SOURCE: EN 1001-2:2005, 4.71] 3.2 supplier sponsor of the test (person or company providing the sample of wood preservative to be tested) Note 1 to entry: Adapted from EN 1001–2:2005, 4.83.
4 Principle Depending on the test being carried out either: — on a set of test specimens of a susceptible wood species that is surface treated with a solution of the preservative; or — if toxic values are to be determined, on several sets of test specimens of a susceptible wood species that are surface treated with a series of solutions in which the concentration of preservative is ranged in a given progression. The treated test specimens are exposed to recently hatched larvae of Hylotrupes bajulus. The resulting attack is observed and compared with those in untreated control test specimens. If the preservative has been prepared in the laboratory by dilution of a concentrate or by dissolution of a solid, the resulting attack is also compared to that in solvent or diluent treated control test specimens.
5 Test materials
5.1 Biological material
5.1.1 Hylotrupes bajulus (Linnaeus) larvae, within three days of hatching.
5.1.2 Source of larvae. Obtain the larvae from cultures reared, e.g. as described in Annex B.
5.1.3 Provision of larvae. Collect larvae from eggs laid by different females.
5.1.4 Choice of larvae. Use a mixed batch of these larvae for the test. Use ten larvae per treated test specimen or control test specimen.
5.2 Products and reagents
5.2.1 Paraffin wax, for fixing the glass plate and for sealing the end faces of test specimens to be treated with solutions in all cases in which water is the continuous phase.
NOTE Paraffin wax with a setting point of 52 °C to 54 °C has been found to be suitable.
5.2.2 Gelatin, for sealing the end faces of test specimens to be treated with solutions in which an organic solvent is the continuous phase.
5.2.3 Water, complying with grade 3 of EN ISO 3696.
5.2.4 Solvent or diluent, a volatile liquid that will dissolve or dilute the preservative but does not leave a residue in the wood at the end of the post-treatment conditioning period that has a toxic effect on the insects.BS EN 46-1 pdf download.
