[目的]建立“染红食品”中苏丹红Ⅰ、Ⅱ、Ⅲ和Ⅳ残留量的高效液相色谱(HPLC)初筛、质谱确认分析方法。[方法]以Merck RP-18柱为分析柱,流动相:乙腈∶水=90∶10,Waters-2996二极管矩阵检测器(PDA)和FinniganLCQ Deca XP MAX质谱仪为检测...[目的]建立“染红食品”中苏丹红Ⅰ、Ⅱ、Ⅲ和Ⅳ残留量的高效液相色谱(HPLC)初筛、质谱确认分析方法。[方法]以Merck RP-18柱为分析柱,流动相:乙腈∶水=90∶10,Waters-2996二极管矩阵检测器(PDA)和FinniganLCQ Deca XP MAX质谱仪为检测器。[结果]回归方程和相关系数为:苏丹红Ⅰ:y=0.163104x+0.019217,r=0.99993;苏丹红Ⅱ:y=0.153674x-0.2212981,r=0.99993;苏丹红Ⅲ:y=0.305919x-5.0810264,r=0.9997;苏丹红Ⅳ:y=0.239273x-5.260669,r=0.9997。平均回收率(%):87.3、83.0、86.7和90.0。[结论]用HPLC-PDA-MS法检测食品中的苏丹红方法简便,重现性好,灵敏度高,定性准确,定量精确。展开更多
This paper considers the uplink of a cooperative Code-Division Multiple-Access (CDMA) system where parts of mobile nodes serve as source nodes while the others serve as relay nodes at any instant in time. When the non...This paper considers the uplink of a cooperative Code-Division Multiple-Access (CDMA) system where parts of mobile nodes serve as source nodes while the others serve as relay nodes at any instant in time. When the non-orthogonal spreading codes are adopted,Multiple Access Interference (MAI) will exist at both the relay nodes and the base node,causing diversity gain to diminish. To mitigate MAI and exploit full advantages of cooperation,the Probabilistic Data Association (PDA) is developed at the relay nodes and the base node. Simulation results demonstrate that some performance gains can be obtained by the PDA detector over the Minimum Mean Square Error (MMSE) detector at high Signal-to-Noise Ratio (SNR) and conversely at low SNR.展开更多
文摘[目的]建立“染红食品”中苏丹红Ⅰ、Ⅱ、Ⅲ和Ⅳ残留量的高效液相色谱(HPLC)初筛、质谱确认分析方法。[方法]以Merck RP-18柱为分析柱,流动相:乙腈∶水=90∶10,Waters-2996二极管矩阵检测器(PDA)和FinniganLCQ Deca XP MAX质谱仪为检测器。[结果]回归方程和相关系数为:苏丹红Ⅰ:y=0.163104x+0.019217,r=0.99993;苏丹红Ⅱ:y=0.153674x-0.2212981,r=0.99993;苏丹红Ⅲ:y=0.305919x-5.0810264,r=0.9997;苏丹红Ⅳ:y=0.239273x-5.260669,r=0.9997。平均回收率(%):87.3、83.0、86.7和90.0。[结论]用HPLC-PDA-MS法检测食品中的苏丹红方法简便,重现性好,灵敏度高,定性准确,定量精确。
基金Supported by the National Natural Science Foundation of China (No. 60772061)Science Foundation of Nanjing University of Posts and Telecommunications (No. NY207132)the Postdoctoral Research Programs (No. 0801054B)
文摘This paper considers the uplink of a cooperative Code-Division Multiple-Access (CDMA) system where parts of mobile nodes serve as source nodes while the others serve as relay nodes at any instant in time. When the non-orthogonal spreading codes are adopted,Multiple Access Interference (MAI) will exist at both the relay nodes and the base node,causing diversity gain to diminish. To mitigate MAI and exploit full advantages of cooperation,the Probabilistic Data Association (PDA) is developed at the relay nodes and the base node. Simulation results demonstrate that some performance gains can be obtained by the PDA detector over the Minimum Mean Square Error (MMSE) detector at high Signal-to-Noise Ratio (SNR) and conversely at low SNR.