【摘要】 <正> 测定水中矿物油的含量是环境保护监测重要项目之一,我国国标建(G.B.J)—1—62规定地面水中石油及石油产品最高容许浓度是:多硫的,0.1毫升/升;其它的,0.3毫克/升。世界卫生组织1971年公布的饮用水质标准中规定矿物油含量为0.1毫克/升,0.3毫克/升,而以后者为最大容许浓度。水中微量矿物油的测定方法有红外分光光度法,紫外分光光度法和萤光法等。在国内以紫外法应用较广并被推荐为水质污染的统一分析测试方法。紫外法是依据矿物油中所含的芳烃在紫外部分具有特征吸收能力作为理论基础的,但芳烃不是矿物油的主要成分,并且某些芳烃含量较低的矿物油的特征吸收峰呈平坦状,致使灵敏度降低。另外,更多还原

【Abstract】 A simple and rapid routine analytical method was developed to determine the micro-quantity of mineral oil in water.The water sample （200ml, PH 1—2） was extracted with carbon disulfide. The extract was evaporated under a current of air and then the residue was dissolved in cs₂ （0.2ml）.The cs₂ solution （5μl）was subjected to GLC on a stainless steel column （2M×4mm） packed with 4% of SE—30 on Gas Chrom Q （60—80mesh） and operated at 180℃ with FID. The heights of n-c₁₆ and n-c₁₇ peaks were used as representation of oil concentrations. The recovery of extraction was over 80%. The limit of detection was 0.1mg/L and standard deviation was ±5%.The gas chromatograms of residues in both improved JIS method and routine quantitative method showed that the former method, in comparing with the later method, gave better standard sample of mineral oil.更多还原