共查询到19条相似文献，搜索用时 723 毫秒
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超高效液相-串联质谱法测定鸡肉组织中金刚烷胺残留 总被引：6，自引：4，他引：2
建立了鸡肉组织中金刚烷胺残留检测的超高效液相-串联质谱方法.采用三氯乙酸:乙腈(1:1,V/V)提取试样中残留的金刚烷胺,SPE净化浓缩,ACQUITY UPLCTMBEH C18色谱柱为分离柱,正离子扫描上机测定.结果显示,金刚烷胺在1 ～ 20 ng/mL的范围内线性关系良好,R2=0.997;样品检出限为1 ng/g,定量限为2 ng/g.在2、5、10 ng/g添加水平的回收率为85％ ～ 125％,批内批间变异系数均小于20％.本方法快速、灵敏、重现性好,适用于鸡肉中金刚烷胺的残留检测. 相似文献
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建立了适用于牛、羊奶样品中莫昔克丁残留的高效液相色谱荧光检测方法。以乙腈为提取液,C18固相萃取柱净化,并用N-甲基咪唑-乙腈(1+1,V/V)和三氟乙酸酐-乙腈(1+2,V/V)进行衍生化。乙腈+水(90+10,V/V)为流动相,荧光法定量。经测定,该方法对牛、羊奶中莫昔克丁的检测限为2 μg/kg,定量限为5 μg/kg。空白牛、羊奶中标准品莫昔克丁添加量分别为5、20、40和80 μg/kg时,牛奶中莫昔克丁平均回收率范围为75.5%～110%,其批内变异系数小于738%,批间变异系数小于7.87%;羊奶中莫昔克丁平均回收率范围为77.5%～95.6%,其批内变异系数小于5.06%,批间变异系数小于5.92%。该方法准确性强、灵敏度高,适用于牛、羊奶中莫昔克丁的快速检测。 相似文献
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高效液相色谱法测定牛奶中的氯霉素残留量 总被引：17，自引：1，他引：16
高效液相色谱法(HPLC)检测牛奶中氯霉素的残留量,采用乙酸乙酯提取牛奶中残留的氯霉素,用正己烷-氯仿(1+1,VI V)溶解残渣,以乙腈-0.005 mol/L磷酸氢二铵(18+82,VIV)作为流动相,用高效液相色谱仪紫外检测器在278nm检测.平均回收率94.8%,变异系数＜12.0%.该方法灵敏度高,操作简便,检测结果准确可靠. 相似文献
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建立了鸡蛋中环丙沙星、达氟沙星、恩诺沙星和沙拉沙星4种氟喹诺酮类药物残留测定的超高效液相色谱方法。样品经磷酸盐缓冲液提取后,用正己烷脱脂,C18固相萃取柱净化,反相高效液相色谱分离,荧光检测器测定。本方法的检测限为环丙沙星、恩诺沙星和沙拉沙星5 μg/kg,达氟沙星1 μg/kg。环丙沙星、恩诺沙星和沙拉沙星在2~200 ng/mL、达氟沙星在0.4～40 ng/mL范围内呈线性相关,相关系数r大于0.9999。在空白鸡蛋中添加环丙沙星、恩诺沙星和沙拉沙星5~50 μg/kg、达氟沙星1～10 μg/kg,4种氟喹诺酮类药物的平均回收率为82.2～101.3％,批内变异系数0.8～5.9％之间(n＝6),批间变异系数在1.0～6.6％之间(n＝4)。结果表明,该法灵敏、准确、特异性强,适用于鸡蛋中氟喹诺酮类药物残留的测定。 相似文献
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鸡蛋中氯霉素残留的检测方法及其消除规律 总被引：5，自引：0，他引：5
选用处于产蛋高峰期的健康海兰蛋鸡20只,单笼饲养,多剂量内服氯霉素(每千克体质量100 mg,连喂12 d),停药后逐只逐日收集鸡蛋,将蛋白、蛋黄分别匀浆,用乙腈、乙酸乙酯、正己烷萃取及净化后,HPLC检测氯霉素浓度.色谱柱为Waters Nova-Pak C18(3.9 mm×150 mm)柱,检测波长为280 nm,流动相为乙腈/水(20/80),流速为1 mL/min,进样量为50 μL.在上述条件下,氯霉素的色谱峰保留时间约为8.0 min,最低检测限为0.002 μg/g,标准曲线的线性范围为0.002～20 μg/g.氯霉素含量为0.5 μg/g时,在蛋白中的批内、批间变异系数分别为3.52%、3.43%;在蛋黄中的批内、批间变异系数分别为3.83%、3.37%.将氯霉素以0.5 μg/g分别添加到空白蛋白和蛋黄中,测得蛋白、蛋黄中氯霉素的回收率分别为94.89%、83.15%.结果表明,本法是一种简便、灵敏、可靠的检测鸡蛋中氯霉素残留的分析方法.停药当天,蛋白、蛋黄中的氯霉素分别为3.61、14.51 μg/g;停药第5天,分别为0.05、7.17 μg/g;停药第8天,蛋白中已检测不到氯霉素,蛋黄中氯霉素为0.80 μg/g;停药第11天,蛋黄中尚有0.04 μg/g的氯霉素,而停药第12天,蛋黄中已检测不到氯霉素.采用MCPKP药动学参数计算程序处理药时数据,算出蛋白、蛋黄中的消除半衰期分别为0.75、1.64 d.结果表明,氯霉素多分布于蛋黄,在蛋黄中的残留水平高,且在蛋黄中的消除较蛋白缓慢. 相似文献
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建立了一种简单、实用的鸡蛋中苏丹红Ⅰ、Ⅱ、Ⅲ、Ⅳ残留的凝胶渗透色谱-超高效液相色谱检测方法。样品用乙腈∶丙酮=9∶1（V/V）溶液提取,经凝胶渗透色谱（GPC）净化后,反相液相色谱分离测定。本方法的检测限为20μg/kg,定量限为50μg/kg。四种苏丹红染料在20～2000 ng/mL范围内呈线性相关。在空白鸡蛋中添加50～1000μg/kg浓度下,四种苏丹红的平均回收率为65%～85%,批内变异系数在1.0%～4.8%之间（n=5）,批间变异系数在2.1%～5.9%之间（n=3）。结果表明,该法简单、灵敏、特异性强、重现性好,适用于鸡蛋中苏丹红Ⅰ、Ⅱ、Ⅲ、Ⅳ残留的测定。 相似文献
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猪肾脏中氯丙嗪和异丙嗪残留检测方法的建立 总被引：6，自引：0，他引：6
建立了猪肾脏中氯丙嗪和异丙嗪残留量检测的高效液相色谱法。猪肾脏中残留的氯丙嗪和异丙嗪,用乙腈提取,再依次用酸化乙腈和正己烷净化,氮气吹干,甲醇溶解后,用Waters高效液相色谱系统,HypersilC18柱,UV检测器,用V(乙腈)∶V(水)∶V(0.5mol·L-1乙酸铵)(50∶49∶1)为流动相,流速1.2mL/min,波长254nm测定,内标法定量。结果表明,氯丙嗪和异丙嗪在猪肾脏中的最低检测限均为10μg/kg,组织中添加量为10μg/kg时,氯丙嗪和异丙嗪的回收率分别为83%和84%,批间变异系数均小于20%。该方法样品处理简单,可同时检测氯丙嗪和异丙嗪在猪肾脏中的残留量。 相似文献
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建立了高效液相色谱法测定麻保沙星溶液含量的方法.以23％甲醇溶液溶解并稀释成每1 mL中含麻保沙星0.1 mg的溶液作为供试品,用十八烷基硅烷键合硅胶色谱柱,以醋酸铵高氯酸钠溶液-乙腈(85∶15,V/V)为流动相,检测波长291 nm,流速1.0 mL/min,柱温40℃,进样量10 μL.结果表明,麻保沙星溶液在5～ 200 μg/mL范围内线性良好,线性方程为Y=4.6×104X+3.64 ×105,r=0.9998;平均回收率为98.3％～100.3％,批内变异系数为0.4％ ～ 1.0％,批间变异系数为0.4％ ～0.9％.本方法准确、可靠,适用于麻保沙星溶液的含量测定. 相似文献
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This study was aimed to develop a method for simultaneous determination of five kinds of penicillins in eggs by high performance liquid chromatography-ultraviolet detection (HPLC-UVD). The eggs samples were extracted by acetonitrile,degreased by n-hexane,concentrated by rotary evaporation,derivatization,and then was separated by HPLC. The results showed that the calibration curves of five kinds of penicillins were linear correlated in the concentration ranges of 10 to 1 000 μg/kg with the correlation coefficients >0.999,which the limits of detection and quantification were 1.5 μg/kg (S/N=3) and 5.0 μg/kg (S/N=10),respectively. The average recoveries were 62.04% to 93.13%,the relative standard deviations were 3.91% to 13.69%.And the intra-day and inter-day RSDs were 3.98% to 14.71% and 4.26% to 12.71%,respectively. The developed method was suitable for detecting five kinds of penicillins residues in eggs with high repeatability and sensitivity. 相似文献
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试验旨在建立一种同时检测鸡蛋中5种青霉素类药物残留的高效液相色谱紫外检测法。鸡蛋经乙腈提取、正己烷脱脂、旋转蒸发浓缩和衍生化后,采用高效液相色谱法分离检测。结果显示,氨苄西林（ampicillin,AMP）、氯唑西林（cloxacillin,CLO）、苯唑西林（oxacillin,OXA）、阿莫西林（amoxicillin,AMO）及普鲁卡因青霉素（penicillins G procaine,PRO）在10~1 000 μg/kg呈良好线性关系,R2>0.999;检测限为1.5 μg/kg（S/N=3）,定量限为5.0 μg/kg（S/N=10）,添加平均回收率为62.04%~93.13%,相对标准偏差为3.91%~13.69%,批内相对标准偏差为3.98%~14.71%,批间相对标准偏差为4.26%~12.71%。表明本试验建立的高效液相色谱紫外法重复性和灵敏度较高,适用于鸡蛋中的5种青霉素类药物残留检测。 相似文献
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The study was aimed to establish the method of simultaneous detection of four kinds of tetracyclines,including oxytraoycline,tetracycline,chlortetracycline and doxyeycline in eggs by high performance liquid chromatography (HPLC).The eggs samples were detected with HPLC after through the procedure of extraction of 0.1 mol/L Na2EDTA-Mcllvaine buffered solution,purification of Oasis MAX solid-phase extraction column,gradient elution of taking acetonitrile-0.01 mol/mL trifluoroacetic acid as mobile phase,separation with reverse liquid chromatography.The results showed that the calibration curves of four kinds of tetracyclines were linear correlated in the concentration range of 30 to 1 000 ng/g which the limits of detection was 10 ng/g and the limit of quantification was 50 ng/g.The average recoveries were 67.3% to 81.4%,relative standard deviations of intraday was 2.7% to 14.3%,relative standard deviations of inter-day was 0.9% to 5.0%.This mothod established in this study could simultaneously detect oxytetracycline,tetracycline,chlortetracycline and doxycycline drug residues in egg and it had high sensitivity,accuracy and precision.The method was rapid and simple to operate. 相似文献
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试验旨在建立同时检测鸡蛋中土霉素、四环素、金霉素和多西环素4种四环素类药物残留的高效液相色谱法。将鸡蛋样品用0.1 mol/L Na2EDTA-Mcllvaine缓冲溶液提取,通过Oasis MAX固相萃取柱净化,以乙腈—三氟乙酸(0.01 mol/mL)为流动相,梯度洗脱,反相液相色谱分离测定。结果显示,4种四环素类药物在30~1 000 ng/g范围内呈良好线性关系,检出限为10 ng/g,定量限为50 ng/g,平均回收率为67.3%~81.4%,日内相对标准偏差为2.7%~14.3%,日间相对标准偏差为0.9%~5.0%。本研究建立的高效液相色谱法可同时检测鸡蛋中的土霉素、四环素、金霉素和多西环素的药物残留,该方法灵敏度、准确度和精密度较高,操作快速、简单。 相似文献
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Summary Bacteriological examination of hatchery waste eggs, identification of the isolated bacteria, and susceptibility testing against seven antimicrobial agents were used in an attempt to establish a rational basis for reducing bacterial infections in newly hatched chicks. Chloramphenicol at 1000 ppm was selected as the antibiotic for preliminary dipping trials and 0.45% iodophore (Wescodyne) was added for later trials. The control treatment consisted of formaldehyde fumigation. The following conclusions can be drawn: (1) Hatchery waste eggs are highly contaminated (69.1%) and enterobacteriaceae predominate (26.6%). (2) Chloramphenicol is the most effective antimicrobial tested. (3) Dip treatments with either chloramphenicol alone or chloramphenicol plus Wescodyne result in a reduced percentage of abnormal navels (8.4% and 10.4%), as compared with 21.9% for the control treatment. (4) Hatchability of either group of dipped eggs is reduced in comparison with fumigated eggs. (5) Dip treatment with chloramphenicol plus Wescodyne significantly reduces the anal carrier rates for Escherichia coli, Pseudomonas aeruginosa, Salmonella spp., and Staphylococcus aureus. This treatment reduces the incidence of bacterial infection in abnormal navels to zero. 相似文献
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建立了油制磺胺间甲氧嘧啶钠(SMM-Na)混悬注射液含量测定的HPLC方法。样品中加入表面活性剂使其成为微乳溶液,然后稀释进样分析。色谱柱为phenomenex synergi Hydro-RP(250 mm×4.6 mm,4μm),柱温40℃,以甲醇-乙腈-1.5%冰乙酸水溶液(10∶20∶70)为流动相,流速为1 mL/min,检测波长271 nm。同一样品经永停滴定法和HPLC两种方法进行含量测定并进行t检验分析,结果显示t0.05,P0.05,呈显著差异。HPLC测定制剂的平均含量为98.99%,RSD为0.48%。磺胺间甲氧嘧啶在20～60μg/mL的浓度范围内与峰面积呈良好的线形关系。本方法更简单、快速、准确,可用于油制磺胺间甲氧嘧啶钠混悬注射液的含量测定。 相似文献
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Bacteriological examination of hatchery waste eggs, identification of the isolated bacteria, and susceptibility testing against seven antimicrobial agents were used in an attempt to establish a rational basis for reducing bacterial infections in newly hatched chicks. Chloramphenicol at 1000 ppm was selected as the antibiotic for preliminary dipping trials and 0.45% iodophore (Wescodyne) was added for later trials. The control treatment consisted of formaldehyde fumigation. The following conclusions can be drawn: Hatchery waste eggs are highly contaminated (69.1%) and enterobacteriaceae predominate (26.6%). Chloramphenicol is the most effective antimicrobial tested. Dip treatments with either chloramphenicol alone or chloramphenicol plus Wescodyne result in a reduced percentage of abnormal navels (8.4% and 10.4%), as compared with 21.9% for the control treatment. Hatchability of either group of dipped eggs is reduced in comparison with fumigated eggs. Dip treatment with chloramphenicol plus Wescodyne significantly reduces the anal carrier rates for Escherichia coli, Pseudomonas aeruginosa, Salmonella spp., and Staphylococcus aureus. This treatment reduces the incidence of bacterial infection in abnormal navels to zero. 相似文献