[Objectives]This study was conducted to establish an uncertainty evaluation method for the determination of ethyl maltol by ultra-high performance liquid chromatograph-mass spectrometer(UPLC-MS).[Methods]A mathematica...[Objectives]This study was conducted to establish an uncertainty evaluation method for the determination of ethyl maltol by ultra-high performance liquid chromatograph-mass spectrometer(UPLC-MS).[Methods]A mathematical model of uncertainty was established by analyzing the method for determining ethyl maltol using UPLC-MS.The sources of uncertainty were analyzed,and the components of uncertainty were calculated to evaluate the expanded uncertainty of the method.[Results]When the content of ethyl maltol in edible vegetable oil was 1657μg/kg,the expanded uncertainty was 22.4μg/kg(K=2,P=95%).[Conclusions]The uncertainty in this evaluation model mainly came from standard solution preparation,sample weighing,dilution of sample to constant volume,standard curve fitting,and repeated measurement.展开更多
采用蒙德火灾、爆炸及毒性评价方法(imperial chemical industries,ICI)对乙基麦芽酚生产过程中的主要反应单元——氯化工艺单元进行危险性评价,根据物质特性和标准规定,确定了主要可燃物质的物质系数.从单元实际情况出发,计算火灾负荷...采用蒙德火灾、爆炸及毒性评价方法(imperial chemical industries,ICI)对乙基麦芽酚生产过程中的主要反应单元——氯化工艺单元进行危险性评价,根据物质特性和标准规定,确定了主要可燃物质的物质系数.从单元实际情况出发,计算火灾负荷指数、装置内部爆炸指数及单元毒性指数等系数.进一步考虑安全补偿系数,得到乙基麦芽酚氯化单元的全体危险性评分,评价结果为安全管理方式的改进提供理论支撑.展开更多
文摘[Objectives]This study was conducted to establish an uncertainty evaluation method for the determination of ethyl maltol by ultra-high performance liquid chromatograph-mass spectrometer(UPLC-MS).[Methods]A mathematical model of uncertainty was established by analyzing the method for determining ethyl maltol using UPLC-MS.The sources of uncertainty were analyzed,and the components of uncertainty were calculated to evaluate the expanded uncertainty of the method.[Results]When the content of ethyl maltol in edible vegetable oil was 1657μg/kg,the expanded uncertainty was 22.4μg/kg(K=2,P=95%).[Conclusions]The uncertainty in this evaluation model mainly came from standard solution preparation,sample weighing,dilution of sample to constant volume,standard curve fitting,and repeated measurement.
文摘采用蒙德火灾、爆炸及毒性评价方法(imperial chemical industries,ICI)对乙基麦芽酚生产过程中的主要反应单元——氯化工艺单元进行危险性评价,根据物质特性和标准规定,确定了主要可燃物质的物质系数.从单元实际情况出发,计算火灾负荷指数、装置内部爆炸指数及单元毒性指数等系数.进一步考虑安全补偿系数,得到乙基麦芽酚氯化单元的全体危险性评分,评价结果为安全管理方式的改进提供理论支撑.