聚乙二醇水溶液中溶解氧的测定.pdfVIP

ofAnhui 安徽农业科学，Journal A酣．Sci．2010，38(30)：16715—16716，16743责任编辑乔利利责任校对傅真治 聚乙二醇水溶液中溶解氧的测定 梁明征，蓝丽红，蓝平，李媚，廖安平+ (广西民族大学化学与生态工程学院，化学与生物转化过程新技术重点实验室，广西南宁530006) 摘要[目的]测定聚乙二醇(PEG)水溶液中的溶解氧。[方法]以碘量法测定水中溶解氧反应为基础，采用分光光度法测定PEG水溶 液中的溶解氧，并考察了PEG分子量、浓度对测定结果的影响。[结果]在选定条件下，分光光度法和碘量法测定结果的最大相对误差 为2．25％。在相同浓度下，PEG水溶液中溶解氧的质量浓度随PEG分子量的增加而下降；在相同分子量时，溶解氧质量浓度随PEG浓 度的增加而下降。[结论]分光光度法测定PEG水溶液中的溶解氧是可行的。 关键词聚乙二醇水溶液；溶解氧；测定；分光光度法 中国分类号S132文献标识码A 文章编号c1517—66ll(2010)30—16715—02 DeterminationofDissolvedin aycol Solution OxygenPolyethyleneAqueous LIANG etal ofChemicaland of and Ming·zheng(KeyLaboratory BiologicalTransformingPmcess，CollegeChemistlyEco—engineering， for GuangxiUniversityNationalities，Nanning，Guangxi530006) aimwastodeterminethedissolvedin on Abstract[Objective]11Ie oxygenpolyethyleneglycol(PEG)aqueous was thedeterminationofdissolvedinwater dissolvedinPEG solutiondetermined oxygen byiedimetry．theoxygen aqueous byspectrophotome- ofPEGmolecularandconcentrationonthedeterminationwere Underthe try．Meanwhile。effectsweight studied．【Resuhgivenconditions， the ellorofdeterminationbetween and was2．25％．UnderthesameconcentrationsofPEG．tlle maximumrelatire soeetrophotometryiodimetry in solution ofPEGmolecular underthesalneme- nlas8concentrationofdissolved PEGaqueous decreasedwiththeincrease weight．and oxygen is todeterminedissolvedin lecular of decreasedwiththeincreaseofPEG feasible the weightPEG。it concentration．[Conclusion]It oxygen PEG solution aqueous byspeetrophotometry． words Key solution；D