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建立了一种测定牛奶中链霉素、双氢链霉素、庆大霉素、大观霉素、新霉素、卡那霉素、阿米卡星和安普霉素8种氨基糖苷类药物的液相色谱-四极杆-静电场轨道阱高分辨质谱方法。样品经提取和分子印迹固相萃取柱净化,新型“液态分离池”Obelisc R色谱柱分离,1%甲酸水溶液与1%甲酸乙腈溶液作为流动相梯度洗脱,四极杆/静电场轨道阱高分辨质谱准确定性并定量。8种待测组分均获得足够的色谱保留和分离,在各自浓度范围内呈现良好的线性关系,相关系数(R2)均大于0.99,定量限在0.5~20 μg/kg之间,平均回收率在68.0%~104.6%之间,批内与批间RSD均不高于11.3%。该法区别于传统方法：不添加离子对试剂,不使用含缓冲盐流动相,最大限度减少了对质谱检测器的污染;采用高分辨质谱检测器定性定量,结果准确可靠;灵敏度较现行国标显著提高。该方法具有良好的可操作性和重现性,适用于牛奶中氨基糖苷类药物的快速筛查、定性筛选和定量测定。 相似文献
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超高效液相色谱-四级杆-静电场轨道肼高分辨质谱筛查测定饲料中19种磺胺类药物 总被引：1，自引：0，他引：1
建立了超高效液相色谱-四级杆-静电场轨道阱高分辨质谱联用(UPLC-Q-Exactive Orbitrap)快速筛查和确证定量饲料中19种磺胺类药物的分析方法。饲料样品经乙腈-0.1%甲酸溶液(80:20,V/V)超声提取,Agilent SB C18色谱柱(100 mm×3.0 mm,1.8μm)分离,以0.1%(V/V)甲酸乙腈溶液和0.1%(V/V)甲酸水溶液为流动相进行梯度洗脱。静电场轨道阱全扫描得到磺胺类药物的一级精确质量数与理论精确相对分子质量对比,相对质量偏差在0.006×10-6~1.252×10-6之间,有效去除了基质干扰,实现对饲料中磺胺类药物的快速筛查;同时建立了19种磺胺类药物的二级质谱数据库,实现对19种磺胺类药物的定性筛查及同步定量。19种磺胺类药物在0.1~200μg/L浓度范围内线性关系良好r0.99,方法检测限为50μg/kg,回收率在59.61%~106.45%之间。 相似文献
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建立了基于超高效液相色谱-四级杆-静电场轨道阱高分辨质谱联用(UPLC-Q-Exactive Orbitrap)快速筛查和确证定量饲料中16种硝基咪唑类药物的分析方法。饲料样品经含0.1%甲酸的乙腈-水(80:20,V/V)溶液震荡提取,Waters ACQUITY UPLC○R BEH C18色谱柱(2.1mm×100mm,1.7μm)分离,以(含0.1%甲酸)乙腈-甲醇(50:50,V/V)溶液和(含0.1%甲酸)水溶液为流动相进行梯度洗脱。静电场轨道阱全扫描得到16种硝基咪唑类药物的一级精确质量数与理论精确质量数对比,质量偏差在0.04975~0.93988mDa;同时建立了二级质谱数据库,实现对16种硝基咪唑类药物的定性筛查及同步定量。16种硝基咪唑类药物在0.1~200μg/L浓度范围内线性关系良好r>0.9990,方法检测限在25μg/Kg^100μg/Kg,回收率在49.47%~105.4%。 相似文献
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建立了鸡蛋中氟虫腈及其代谢物残留的液相色谱/串联质谱检测方法分析方法。样品经乙腈提取,PRIME HLB净化脂肪,采用电喷雾离子源负离子检测模式(ESI-)和多重反应监测(MRM)模式测定,外标法定量分析。结果表明：氟虫腈及其代谢物在0.1～20 ng/mL的范围内均具有良好的线性关系,相关系数（R2）不小于0.9997,在2、10和20μg/kg不同加标浓度下的平均加标回收率为99.92%～108.3%,相对标准偏差：1.96%～5.01%,方法检出限为0.008～0.023μg/kg。该方法快速、简便、灵敏,适用于鸡蛋中氟虫腈及其代谢物的快速测定。 相似文献
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开发建立了超高效液相色谱-二极管阵列-串联四级杆静电场轨道阱高分辨质谱联用分析杆菌肽组分的方法。采用(Phenomenex C18100 mm×3.0 mm,2.6μm)色谱柱,以0.1%甲酸溶液-0.1%甲酸甲醇乙腈(75+25)溶液为流动相,0.3 mL/min线性梯度洗脱分离,紫外吸收波长为254 nm。采集杆菌肽各组分质谱母离子及其对应子离子,并进行解析,推测组分的结构。在所建立的条件下,检测出9个组分,杆菌肽各组分之间分离良好。利用紫外与质谱归一化法测定含量,两种结果相对偏差在0.01%~3.53%之间。建立的超高效液相色谱-二极管阵列-串联四级杆静电场轨道阱高分辨质谱法能有效分析多肽类药物杆菌肽各组成成分,为杆菌肽的质量控制和工艺优化提供了参考。 相似文献
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建立了生鲜牛乳中链霉素、双氢链霉素、庆大霉素、妥布霉素、卡那霉素、阿米卡星和安普霉素共7种氨基糖苷类抗生素残留的超高效液相色谱-串联质谱检测方法。样品经100mL/L三氯乙酸-乙腈提取和WCX固相萃取柱净化后,采用亲水作用色谱分离,四极杆-静电场轨道阱高分辨质谱检测。对样品前处理条件、液相色谱流动相及质谱条件进行了优化。结果表明,7种氨基糖苷类抗生素在20μg/L~500μg/L范围内线性关系良好,生鲜牛乳中的加标回收率为88.7%~111.2%,相对标准偏差为6.3%~13.1%,该方法灵敏、准确,可用于生鲜牛乳中多种氨基糖苷类抗生素残留的同时检测。 相似文献
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建立超高效液相色谱-串联质谱法测定全蛋粉、蛋黄粉及乳制品中氟虫腈及其代谢物的通用检测方法。样品经乙腈提取,饱和氯化钠使乙腈和水分层,低温冷冻沉淀蛋白质,取上清液转移至HLB固相萃取小柱净化,Acquity UPLC BEH C18色谱柱（2.1 mm×50 mm,1.7 μm）分离,以水-乙腈为流动相进行梯度洗脱,电喷雾离子源负离子模式、多反应监测模式测定,外标法定量。结果表明：氟虫腈及其代谢物在0.5～20.0 μg/L质量浓度范围内线性关系良好,R2均大于0.990;检出限均为0.2 μg/kg,定量 相似文献
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超高效液相色谱-串联质谱法测定牛奶中的赛拉嗪残留 总被引：1，自引：0，他引：1
采用乙腈提取,HLB固相萃取柱净化、超高效液相色谱-串联质谱测定,建立了一种简单、快速的牛奶中赛拉嗪残留的检测方法.对样品的提取、净化过程进行了优化改进,经ACQUITY UPLCTM BEH C18色谱柱分离,正离子电喷雾电离串联质谱测定,牛奶中赛拉嗪的检测限为0.2 μg/kg,定量限为0.5μg/kg.选取0.5... 相似文献
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Beran GW 《Preventive veterinary medicine》2008,86(3-4):198-207
When early people made their appearance, zoonotic infectious diseases were already waiting, but epidemic diseases did not appear in human history until people began to live in large numbers under conditions of close contact, mainly during the last 10,000 years. Disease has decimated urban populations, conquered armies, and disrupted society. The focus here is on (1) the plague of Athens and the Black Death; (2) smallpox, influenza, and rabies; (3) avian influenza prion diseases, and foot & mouth disease; and (4) emerging and re-emerging diseases. All have veterinary public health associations. In Athens, Greece, in 430 BC, when the Spartans ravaged the countryside, hordes crowded into Athens so that orderly movements, space in which to live, and adequate supplies of food became impossible. Crowding of any population fosters disease transmission; chaos and disorder enhance it all the more. Out of northern Egypt came a terrible plague from across the Mediterranean Sea. The identity of the plague of Athens remains unsure, but the well-considered conclusion is Rift Valley Fever, a mosquito borne, viral zoonosis. The Black Death, also called the Plague, raged in Asia for centuries. In 1347, the Black Death was brought by a ship out of Asia to Sicily. The scenes of devastation were repeated throughout Europe, with 90% or more of the people dying in city after city. Influenza, too, has been a cause of periodic human epidemics, but the great pandemic of influenza occurred in the last months of World War I. In the years of highest occurrence, more than half the world's population became clinically infected. If veterinary public health had been born earlier, it could have led to elucidating the epidemiology of influenza and the plagues of Athens, Europe, and Asia. In turn, smallpox had also caused continual tragedy. In 1796, Edward Jenner began to harvest pustules of cowpox from children or infected cows and inject them into susceptible children. In 1980, the World Health Organization declared that smallpox had been eliminated from the world. Rabies, though, still strikes terror. A number of animal diseases, broadly termed emerging and re-emerging diseases, need surveillance because they have the potential to impact human health. From late in 2003 to 2007, the highly pathogenic H5N1 influenza virus in poultry infected at least 121 people and caused 62 deaths in four countries. The prion diseases, too, all have very high numbers in concentrated contacts. To control these diseases, veterinary public health is essential, with diagnosis, epidemiological surveillance, clinical manifestations, and prevention as primary measures. 相似文献
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Dekker A Dercksen D Snoep J van Wuyjckhuise L 《Tijdschrift voor diergeneeskunde》2007,132(18):695-701
On 26th of july 2007 a new case of bluetongue was notified in the Netherlands and on 2nd of august 2007 foot-and-mouth disease was diagnosed in Surrey, England, which raised the threat of having both infections simultaniously in one area. Bluetongue and foot-and-mouth disease have a different pathogenesis, but symptoms may resemble each other at a later stage of infection. The pathogenesis and possible clinical symptoms of both infections are discussed and illustrated with pictures. 相似文献
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在动物的异常行为中以刻板行为最为常见,而咽气癖又是马最常见的口部刻板行为之一。作者就咽气癖在生理方面和心智方面对马体产生的影响、行为基础、诱因的研究进展及常见的防治措施进行综述。 相似文献
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近几年,世界饲用添加剂市场增长较快,预计今后将进一步增长,据世界粮农组织(FAO)首领会议的倡议,到2015年,将使世界营养不良的人口削减一半,其间,肉制品将会以每年2％的速度增长,特别是加快猪肉和禽肉增长。这将促进世界添加剂,尤其是蛋氨酸和赖氨酸需求量的增加。 相似文献
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