Reconstructed synsedimentary paleogeomorpholgy is an effective method in predicting the distribution of sandbodies and can provide valid evidence in the search for reservoirs. Based on a synsedimentary paleogeomorphol...Reconstructed synsedimentary paleogeomorpholgy is an effective method in predicting the distribution of sandbodies and can provide valid evidence in the search for reservoirs. Based on a synsedimentary paleogeomorpholgy reconstruction of the third member of the Dongying formation (Ed3) in the Qikou sag,the basic paleogeomorphic characteristics of Ed3 are described and the spatial distributions of denudation and subsidence areas are discussed. Key boundary faults controlling the deposition of important sediment bodies are proposed and the interrelations among faulted slope-break belts or flexure belts,intra-depression uplifts and sags,sediment sources and sediments input points have been investigated.展开更多
基于QuEChERS的快速、简便的优势,建立了一种同时测定食品中展青霉素(PAT)、呕吐毒素(DON)、黄曲霉毒素B_(1)、B_(2)、G_(1)、G_(2)(AFB_(1)、AFB_(2)、AFG_(1)、AFG_(2))、玉米赤霉烯酮(ZEN)、赭曲霉毒素A(OTA)等8种真菌毒素的方法。...基于QuEChERS的快速、简便的优势,建立了一种同时测定食品中展青霉素(PAT)、呕吐毒素(DON)、黄曲霉毒素B_(1)、B_(2)、G_(1)、G_(2)(AFB_(1)、AFB_(2)、AFG_(1)、AFG_(2))、玉米赤霉烯酮(ZEN)、赭曲霉毒素A(OTA)等8种真菌毒素的方法。样品采用乙腈-水-乙酸(70:29:1,V/V/V)混合提取液提取,经乙二胺-N-丙基硅烷(PSA)、碳十八键合硅胶(C18)、石墨化碳黑(GCB)和无水硫酸镁混合型固相分散净化,净化液过滤膜后通过Phenomenex Luna C_(18)(2)100Å(150×2.0 mm,3μm)色谱柱分离,以电喷雾电离串联质谱多反应监测模式(MRM)进行确证和检测,氘代同位素内标法定量,分别对流动相、提取溶剂、固相净化剂的选择进行了优化。结果表明:8种真菌毒素显示了良好的线性关系(r≥0.9984);在低、中、高3个添加水平下目标物的加标平均回收率为70.1%~119%,相对标准偏差(RSD)为2.45%~9.97%;方法的检出限(LOD,S/N=3)为0.28~42.18μg/kg。该方法前处理快速简便、灵敏度高、重现性好,适用于花生、玉米、薏米仁中多种真菌毒素的测定。展开更多
基金Projects 40872077 supported by the National Natural Science Foundation of China2008CDA098 by the Key Natural Science Foundation of Hubei Province
文摘Reconstructed synsedimentary paleogeomorpholgy is an effective method in predicting the distribution of sandbodies and can provide valid evidence in the search for reservoirs. Based on a synsedimentary paleogeomorpholgy reconstruction of the third member of the Dongying formation (Ed3) in the Qikou sag,the basic paleogeomorphic characteristics of Ed3 are described and the spatial distributions of denudation and subsidence areas are discussed. Key boundary faults controlling the deposition of important sediment bodies are proposed and the interrelations among faulted slope-break belts or flexure belts,intra-depression uplifts and sags,sediment sources and sediments input points have been investigated.
文摘基于QuEChERS的快速、简便的优势,建立了一种同时测定食品中展青霉素(PAT)、呕吐毒素(DON)、黄曲霉毒素B_(1)、B_(2)、G_(1)、G_(2)(AFB_(1)、AFB_(2)、AFG_(1)、AFG_(2))、玉米赤霉烯酮(ZEN)、赭曲霉毒素A(OTA)等8种真菌毒素的方法。样品采用乙腈-水-乙酸(70:29:1,V/V/V)混合提取液提取,经乙二胺-N-丙基硅烷(PSA)、碳十八键合硅胶(C18)、石墨化碳黑(GCB)和无水硫酸镁混合型固相分散净化,净化液过滤膜后通过Phenomenex Luna C_(18)(2)100Å(150×2.0 mm,3μm)色谱柱分离,以电喷雾电离串联质谱多反应监测模式(MRM)进行确证和检测,氘代同位素内标法定量,分别对流动相、提取溶剂、固相净化剂的选择进行了优化。结果表明:8种真菌毒素显示了良好的线性关系(r≥0.9984);在低、中、高3个添加水平下目标物的加标平均回收率为70.1%~119%,相对标准偏差(RSD)为2.45%~9.97%;方法的检出限(LOD,S/N=3)为0.28~42.18μg/kg。该方法前处理快速简便、灵敏度高、重现性好,适用于花生、玉米、薏米仁中多种真菌毒素的测定。
