标准摘要
[中文适用范围]： 将测试部分在环境温度下蒸发，并用四氯化碳萃取残留物中所含的油。 残余物中所含的油可以通过蒸发有机溶剂并称重残余物来进行重量分析，或者通过在约3.42 m的波长下对有机相的吸光度进行光谱测量来测定。 重量法适用于含油量等于或大于10mg/kg的产品。 红外光谱法灵敏度较高，适用于含油量大于1mg/kg的产品。 [外文原描述]： A test portion is evaporated at ambient temperature and the oil contained in the residue is extracted with carbon tetrachloride. The oil contained in the residue is determined either gravimetrically by evaporation of the organic solvent and weighing of the residue or by spectrometric measurement of the absorbance of the organic phase at a wavelength of approximately 3.42 m. The gravimetric method is applicable to products having an oil content equal to or greater than 10 mg/kg. The infra-red spectrometric method, being more sensitive, is applicable to products having an oil content greater than 1 mg/kg.
英文名称Liquefied anhydrous ammonia for industrial use — Determination of oil content — Gravimetric and infra-red spectrometric methods