BS EN 14582 pdf free download
BS EN 14582 pdf free download. Characterization of waste — Halogen and sulfur content — Oxygen combustion in closed systems and determination methods.
3 Terms and definitions For the purposes of this document, the following terms and definitions apply. NOTE Be aware that the above definitions are valid for this empirical EN only and do not comply with scientific definitions of sulfur and halogen content. 3.1 sulfur content sum of sulfur contained as organic and inorganic compounds that can be converted to sulphate by combustion and then absorbed or dissolved in an aqueous solution 3.2 halogen content sum of halogens contained as organic and inorganic compounds that can be converted to halides (fluoride, chloride, bromide, iodide) by combustion and then absorbed or dissolved in an aqueous solution 4 Principle The sample is oxidized by combustion in a closed system (a bomb containing oxygen under pressure). Halogenated and sulfur containing compounds are converted to fluoride, chloride, bromide, iodide and sulphate, which are absorbed and/or dissolved in an absorption solution. Several methods may be used for the determination of halides and sulphate concentrations in the absorption solution. The method may be used for samples that burn with difficulty, which involves the use of a combustion enhancer. 5 Interferences There are no interferences in the combustion step described in this standard but interferences may occur during the subsequent determination of sulphate and halides (see corresponding standards). Insoluble halides and sulphate present in the sample or produced during the combustion step are not completely determined by these methods. The choice of absorption solutions may introduce interferences depending on the analytical technique used. 6 Hazards Hydrogen peroxide is very caustic; potassium and sodium hydroxide are corrosive and hydrazine hydrate is harmful, toxic and carcinogenic. Thus the operator shall wear goggles and gloves and shall work under a fume hood when handling this reagent. As this method uses a gas (oxygen) at a high temperature and a high pressure, precautions shall be taken by the operator. 8 Sample conservation and pretreatment of test portion Biological active laboratory samples should be stored at 4 °C and the analyses of halogen and sulfur should be carried out within seven days after sampling. If this is not possible, the samples should be further preserved by e.g. freezing, if possible, to minimize biodegradation and loss of volatile halogenated and sulfur compounds. The test sample is prepared according to EN 15002. For solid materials, the particle size should be less than 200 µm. During preparation of the test sample, the use of halogenated polymers, e.g. PVC gloves, should be avoided. Drying the laboratory sample may be carried out for homogenization purposes if the sample, according to the accuracy of the method, contains only negligible amounts of halogen and sulfur compounds volatile at the temperature intended for the drying process. Dry matter is determined according to EN 14346 on a separate sub sample (the result will be used for calculation). Heterogeneous moist or paste like samples may be mixed with aluminium oxide (7.1.10) until granular material is obtained and then reduced to a granular powder, preferably with a particle size less than 200 µm. In this case, the ratio of aluminium oxide to sample should be incorporated into the calculation of the halogen and sulfur content and combustion enhancer should be added if necessary.BS EN 14582 pdf download.
