ISO 17183:2016 土质 通过测定乳化指数受光的衰减筛选土壤有机化合物的可萃取异丙醇

标准编号：ISO 17183:2016

中文名称：土质 通过测定乳化指数受光的衰减筛选土壤有机化合物的可萃取异丙醇

英文名称：Soil quality — Screening soils for isopropanol-extractable organic compounds by determining emulsification index by light attenuation

发布日期：2016-04

标准范围

This International Standard specifies the procedure to screen highly contaminated soils to detectorganic compounds extractable with isopropanol, including a wide range of fuels, oils, and greases.The method is useful for finding hot spots. It is applicable both in laboratories and for site screeningin the field. The working range is approximately 0,01 to 0,3 in absorbance units, corresponding toapproximately 500 mg/kg to 10 000 mg/kg of isopropanol-extractable organic compounds in soil.The light attenuation due to light scattering/absorption approach in this method is designed to quicklyscreen soil samples using calibration with the most appropriate substance(s) likely to be present on agiven site to indicate the concentration levels.This screening technique is applicable for a broad spectrum of organic compounds, mainlyhydrocarbons. Organic compounds are a very broadly defined mixture of compounds, which show theirown specific emulsification indices (see Annex A) and a gross emulsification index in a mixture sample,defined primarily by their insolubility in water. The more insoluble the compounds (e.g. non-polarcompounds), the higher the response. Hydrocarbons are generally less-reactive and have little polarity.Determination of emulsification indexes uses their non-polar nature to detect organic compoundsincluding a wide range of hydrocarbons from about C8 to about C36.NOTE This method can also be applied to biological substances such as vegetable oils.This method is not applicable for determination of specific organic compounds or groups of compoundsthat may be part of a larger organic compound mixture. As with other screening techniques, it isadvisable to confirm a certain percentage of both positive and negative test results, especially whennear or above a regulatory action limit or when the presence of background or when interfering organiccompounds such as surface active substances are suspected to be present.This method does not address the evaporation of any volatile organic compound mixtures (i.e.,gasoline) during sampling, preparation and detection. Although the screening method can be usedfor the quantitative detection of volatile hydrocarbons, it is not intended that the method be used forthe quantitative determination of volatile petroleum hydrocarbons unless evaporation during samplehandling is addressed; the response factor be appropriately corrected, or the method performance bedemonstrated on real samples.If emulsifiers or surface active substances (e.g. detergents) are present, significantly negatively-biasedor false negative results can be obtained. If there is any evidence for the presence of surfactances in thesoil, this method cannot be applied.

标准预览图