《水质石油类的测定紫外分光光度法(试行)》(HJ970-2018)中的问题探讨

Problems Discussed on the Water Quality-Determination of Petroleum-Ultraviolet Spectrophotometric Method(Trial)(HJ970—2018)

基于新实施的《水质石油类的测定紫外分光光度法(试行)》(HJ970-2018),结合实际操作中遇到的问题,通过试验,在正己烷透光率、样品采集、萃取、脱水、吸附等方面探讨了(HJ970-2018)中发现的问题。结果表明,不同品牌不同级别的正己烷透光率有显著差异,这对石油类的测定起关键作用;样品采集、萃取、脱水、吸附可进一步改进,并给出了相应对策建议。

Based on the newly implemented method Water Quality-Determination of Petroleum-Ultraviolet Spectrophotometric Method(Trial)(HJ970—2018),combined with the problems encountered in actual operation,via experiments,the problems found in(HJ970-2018)such as the light transmittance of n-hexane,sample collection,extraction,dehydration and adsorption were discussed.The results have showed that the there exist significant differences in light transmittances of n-hexanes of different brands and different grades,were sigrificantly different which played a key role in the determination of petroleum;sample collection,extraction,dehydration and adsorption can be further iniproved,the corresponding countermeasures and suggestions were given.