收稿日期:2021-05-06;修回日期:2021-10-28;录用日期:2021-11-18*E-mail:jshi@xsyu.edu.cn苯基双胍制备体系的紫外光谱行为研究王立玮,史俊*,张睿辉(西安石油大学化学化工学院,陕西西安710065)摘要:采用紫外分光光度法对双氰胺与苯胺发生亲核加成得到苯基双胍的反应体系进行单组分与多组分共存时的检测发现,各物质的吸收带之间无明显干扰。以朗伯比尔定律计算出各物质相应的质量浓度,进行合成全过程中不经分离即可对各组分进行浓度监控的模拟。基于该亲核加成中酸催化剂的关键作用,经研究发现,pH对于该体系反应过程中浓度监控的影响,可用加入缓冲溶液来消除。关键词:双胍;紫外;检测中图分类号:TQ014;TQ031.2文献标志码:AStudyonUltravioletSpectrumBehaviorofPhenylbiguanidinePreparationSystemWangLiwei,ShiJun*,ZhangRuihui(SchoolofChemistryandChemicalEngineering,Xi′anShiyouUniversity,Xi′an,Shaanxi710065,China)Abstract:Ultravioletspectrophotometrywasusedtodetectthereactionsysteminwhichthenucleophilicadditionofdicyandiamideandanilineproducedphenylbiguanidewiththecoexistenceofsinglecomponentandmultiplecomponents.Itwasfoundthattherewasnoobviousinterferencebetweentheabsorptionbandsofeachsubstance.LambertBeer’slawisusedtocalculatethecorrespondingmassconcentrationofeachsubstance,andtheconcentrationmonitoringofeachcomponentcanbesimulatedduringthewholeprocessofsynthesiswithoutseparat...