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1、热带作物学报2012,33(12):2273-2278ChineseJournalofTropicalCrops咪鲜胺在香蕉防腐保鲜储藏中的残留消解动态分析郑雪虹1,21,21,21,21,2,谢德芳,吕岱竹,冯信平,潘永波1中国热带农业科学院分析测试中心,海南海口5711012农业部热作产品质量安全风险评估实验室,海南海口571101摘要气相色谱分析45%咪鲜胺香蕉常温储藏和冷库储藏下的消解动态规律和最终残留。采用咪鲜胺药液浸泡法处理刚采摘的香蕉,经检测咪鲜胺在香蕉中的消解动态符合负指数方程,半衰期:常温下是10.06~10.33d,在冷库条件下19.64~21.80d。室温储藏28
2、d后,咪鲜胺的分解率达86.22%以上,冷库条件下70d达90%以上。最终残留量,以高剂量900mg/kg浸果一次,储藏天数7~21d,常温条件和冷库条件下果肉中的残留未检出,全果中的残留常温下是0.925~3.345mg/kg,冷库条件下是2.789~4.182mg/kg。常温储藏较低温储藏降解速度显著加快,其残留代谢物主要集中于果皮,而果肉部分残留极少。按GB2763-2005,咪鲜胺在香蕉上的MRL值为5mg/kg,45%咪鲜胺乳油在香蕉贮藏时采用500~1000倍浸果,浸果1min,且浸果1次,贮藏保鲜7d以上,是安全的。关键词咪鲜胺;香蕉;残留消解;安全性中图分类号S668.
3、1;S482.295文献标识码AResidualDynamicsof45%ProchlorazinStorageBanana1,21,2··1,21,21,2ZHENGXuehong,XIEDefang,LuDaizhu,FENGXinping,PANYongbo1AnalyzingandTestingCenter,ChineseAcademyofTropicalAgriculturalSciences,Haikou,Hainan571101,China2LaboratoryofQuality&SafetyRiskAssessmentforTropicalProducts(Haikou
4、),MinistryofAgriculture,Haikou,Hainan571101,ChinaAbstractTheresidualprochlorazinstorage-bananaweredeterminedbyGCwithECDNi63·Thebananaspickedforashorttimeweresoakedinprochlorazliquid.Theresultsshowedthattheresiduedeclineofprochlorazinthebananaswasfoundtoconformtoexponentialequation.Thehalf-lifeof
5、prochlorazwas10.06-10.33dinroomtemperature(20℃-25℃)and19.64-21.80dincooltemperature(13℃-14℃),respectively.Theprochlorazwasdegradedbymorethan86.22%inthenormaltemperaturewarehouseafter28d.After70d,theprochlorazwasdegradedbymorethan90.00%intherefrigerationhouse.Thefinalresidueresultsshowedthatdurin
6、g7-28daysstorageatroomtemperature,soakedforonetimeinhighdosage(900mg/kg),thebananasprochlorazresidueswere0.925-3.345mg/kg;andwere2.789-4.182mg/kgatcooltemperature.Theprochlorazresiduewasnotfoundinbananapulps.Theresiduewasmostlyleftinthebananapeelandthemetabolicrateofprochlorazstoredinnormalenvir
7、onmentwasmorerapidthanthatincooltemperaturestorage.WithreferencetotheMRL(5mg/kg)ofGB2763-2005,itwassuggestedthatthesafetyperiodwas7daftersoakingin45%prochlorazdilutedby500-1000times,soaked1timefor1minute.KeywordsProchloraz;B