Dajing Cu-Sn-Ag-Pb-Zn ore deposit, in the Inner Mongolia Autonomous Region of China, is a fissure-filling hydrothermal ore deposit. The d D values of quartz-hosted inclusion water are centered at -100 — -130. The d 3...Dajing Cu-Sn-Ag-Pb-Zn ore deposit, in the Inner Mongolia Autonomous Region of China, is a fissure-filling hydrothermal ore deposit. The d D values of quartz-hosted inclusion water are centered at -100 — -130. The d 34S values of sulfide ore minerals and d 13C values of carbonate gangue minerals vary from 0.3 to 2.6 and from -2.9 to -7.0, respectively. Integrated isotopic data point to two major contributions to the mineralizing fluid that include a dominant meteoric-derived groundwater, and sulfur and carbon species from hypogene magma. Linear trends are exhibited on the gaseous H2O versus CO2 plot, and plots of CO, N2, CH4, and C2H6. It is shown by quantitative simulation that magma degassing cannot explain the linear trends. Hence, these linear trends are interpreted in terms of mixing of CO2-rich magmatic fluid with meteoric-derived groundwater. The groundwater circulated in Paleozoic sedimentary rocks and absorbed CO, N2, CH4, C2H6 and radiogenic Ar from organic matter. Cooling effects resulting from mixing have caused the precipitation of ore minerals.展开更多
目的建立超高效液相色谱-单四极杆质谱(ultra performance liquid chromatography-quadrupole mass spectrometer, UPLC-QDa)同时测定奶粉及酸奶中33种(咪唑类、β受体激动剂和大环内酯类)兽药残留的检测方法。方法样品经水溶解分散后以...目的建立超高效液相色谱-单四极杆质谱(ultra performance liquid chromatography-quadrupole mass spectrometer, UPLC-QDa)同时测定奶粉及酸奶中33种(咪唑类、β受体激动剂和大环内酯类)兽药残留的检测方法。方法样品经水溶解分散后以3%(V:V)甲酸乙腈超声提取,离心后上清液用PRIME HLB固相萃取柱净化后氮吹浓缩,采用0.1%甲酸水溶液(A)和乙腈(B)作为流动相进行梯度洗脱,以选择离子监测模式对各个目标化合物定量离子进行监测分析。结果33种兽药在各自浓度范围内线性关系良好,相关系数均大于0.991。33种兽药在2种基质中的加标回收率为59.4%~108.5%,相对标准偏差(relative standard deviation, RSD)为1.68%~13.70%(n=6),检出限(S/N=3, limits of detection, LOD)和定量限(S/N=10, limits of quantification, LOQ)分别为0.06~4.66μg/kg和0.19~23.68μg/kg。结论该方法快捷简单,灵敏度高,适用于奶粉及酸奶样品中多种兽药检测。展开更多
基金This work was supported by the Chinese Academy of Sciences(Grant Nos.KZCX1-07-04 and IGG CX2000-02).
文摘Dajing Cu-Sn-Ag-Pb-Zn ore deposit, in the Inner Mongolia Autonomous Region of China, is a fissure-filling hydrothermal ore deposit. The d D values of quartz-hosted inclusion water are centered at -100 — -130. The d 34S values of sulfide ore minerals and d 13C values of carbonate gangue minerals vary from 0.3 to 2.6 and from -2.9 to -7.0, respectively. Integrated isotopic data point to two major contributions to the mineralizing fluid that include a dominant meteoric-derived groundwater, and sulfur and carbon species from hypogene magma. Linear trends are exhibited on the gaseous H2O versus CO2 plot, and plots of CO, N2, CH4, and C2H6. It is shown by quantitative simulation that magma degassing cannot explain the linear trends. Hence, these linear trends are interpreted in terms of mixing of CO2-rich magmatic fluid with meteoric-derived groundwater. The groundwater circulated in Paleozoic sedimentary rocks and absorbed CO, N2, CH4, C2H6 and radiogenic Ar from organic matter. Cooling effects resulting from mixing have caused the precipitation of ore minerals.
文摘目的建立超高效液相色谱-单四极杆质谱(ultra performance liquid chromatography-quadrupole mass spectrometer, UPLC-QDa)同时测定奶粉及酸奶中33种(咪唑类、β受体激动剂和大环内酯类)兽药残留的检测方法。方法样品经水溶解分散后以3%(V:V)甲酸乙腈超声提取,离心后上清液用PRIME HLB固相萃取柱净化后氮吹浓缩,采用0.1%甲酸水溶液(A)和乙腈(B)作为流动相进行梯度洗脱,以选择离子监测模式对各个目标化合物定量离子进行监测分析。结果33种兽药在各自浓度范围内线性关系良好,相关系数均大于0.991。33种兽药在2种基质中的加标回收率为59.4%~108.5%,相对标准偏差(relative standard deviation, RSD)为1.68%~13.70%(n=6),检出限(S/N=3, limits of detection, LOD)和定量限(S/N=10, limits of quantification, LOQ)分别为0.06~4.66μg/kg和0.19~23.68μg/kg。结论该方法快捷简单,灵敏度高,适用于奶粉及酸奶样品中多种兽药检测。
