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BS ISO 16000-31:2014 pdf free

BS ISO 16000-31:2014 pdf free.Indoor air一Measurement of flame retardants and plasticizers based on organophosphorus compounds一Phosphoric acid ester
Emission measurements with building products and consumer goods under controlled climatic conditions are undertaken in order to establish substance-specific release rates [specific emission rates (SERs)].[12][13][14] The chamber air measurement takes place in a dust-free atmosphere so as to enable a simplified sampling procedure without particle separation as hereafter described. Care shall be taken with regard to the chamber volume, air exchange rate, and sampling volume so that the sampling volume is smaller than the amount of supplied air. The sample preparation, and in particular the sample storage,shall be coordinated with the test chamber measurement.
Due to the physical properties of the compound class, the measurement of the OPC emissions from building products and from devices for indoor use is a complex process. Principally, such emissions can be determined by the chamber analyses according to ISO 16000-9. If ISO 16000-9 developed for volatile organic compounds (VOCs) is applied to semi-volatile OPC (SVOC), the specific chamber properties (e.g.sink effects) shall be taken into consideration.14][15] A precondition for performing the test chamber analyses is the knowledge of ISO 16000-9.
The described physical and physical-chemical properties of OPC, as well as their wide distribution, lead to substantial difficulties in the quantification of OPC. It is recommended to regularly check each step of the procedure to be free of blanks or carry-over effects. In case of doubt, the blanks shall be checked prior to each determination.
The following interferences that should be avoided by the proper application of the guideline have been found in the course of the development of the method and during the drafting of this guideline:Relevant blanks and, consequently, carry-over effects are caused both by OPC-containing materials (e.g. paper filters) and by the losses from adsorptions on the apparatus walls. For example, cyclohexane is not in the position to keep strong polar OPC in the solution. When acetone/cyclohexane is used for extraction, it can be found that up to 100 % of the available TCEP is irreversibly adsorbed on the glass walls of the extraction or concentration apparatus if acetone is removed from the solvent mixture by distillation.BS ISO 16000-31 pdf download.


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