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1.
建立了化妆品中四环素、土霉素、金霉素、强力霉素、甲烯土霉素、去甲基金霉素、二甲胺四环素、脱水四环素和差相四环素含量的液相色谱串联质谱测定方法.对提取溶剂、流动相、流动相的梯度以及质谱参数进行了研究.采用乙腈-甲醇-草酸水溶液提取,LC-MS/MS分离测定,样品中被测物与干扰物能得到良好的分离.甲烯土霉素、去甲基金霉素在0.05 ~10.0 mg/L 范围内其质量浓度与峰面积均呈良好的线性关系,其余7种化合物在0.01 ~10.0 mg/L范围内其质量浓度与峰面积呈良好的线性关系.添加1.0 ~50.0 mg/kg时的加标回收率为73% ~99%,相对标准偏差低于13.2%.该法简便、快速、准确,可用于化妆品中上述9种四环素类药物的定性、定量检测.  相似文献   

2.
建立了动物组织中四环素、金霉素、土霉素、强力霉素、去甲基金霉素、甲烯土霉素和二甲胺四环素等7种四环素类抗生素残留量的液相色谱同时测定方法。方法采用Inertsil C8-3(5μm,250 mm×4.0 mm i.d)反相色谱柱,以pH 4.0的EDTA-Mcllvaine缓冲溶液为提取溶液,以HLB固相萃取柱为净化柱,流动相为甲醇+乙腈+0.01mol/L三氟乙酸(梯度洗脱),流速1.5 mL/min,检测波长350 nm,进样量100μL。方法的检出限为1.5~5.0μg/kg,测定低限为50μg/kg,线性范围为50~1200μg/kg,加标回收率为73.8%~103%,相对标准偏差为0.5%~8.5%。方法适用于动物肌肉、肝脏和肾脏组织中7种四环素类抗生素残留量的同时检测。  相似文献   

3.
建立了牛奶中四环素、金霉素、土霉素、强力霉素、去甲基金霉素、甲烯土霉素和二甲胺四环素等7种四环素类抗生素及差向四环素、差向金霉素、差向土霉素等3种代谢产物多残留的液相色谱串联质谱同时测定方法。方法采用Inertsil C8-3(5μm,150 mm×2.1 mm i.d)反相色谱柱,以pH 4.0的EDTA-M c llvaine缓冲溶液为提取溶液,以HLB固相萃取柱为净化柱,流动相为甲醇 0.01 mol/L三氟乙酸(梯度洗脱),流速0.3mL/m in,以正离子多反应监测模式测定,进样量30μL。方法的检出限为0.5~10μg/kg;测出限为50μg/kg;线性范围为50~1200μg/L,加标回收率为74.4%~101%,相对标准偏差为1.8%~8.3%。本方法具有灵敏、准确、简便、快速等优点,适用于牛奶中四环素类抗生素及其代谢产物多残留的同时确证检测。  相似文献   

4.
建立了固相萃取-高效液相色谱检测鸡粪和牛粪中的罗红霉素、土霉素、四环素和金霉素4种抗生素的分析方法。采用15 mL EDTA-McIlvaine缓冲液超声萃取15 min,萃取液浓缩后经HLB固相萃取柱净化,甲醇洗脱,洗脱液浓缩定容后用HPLC进行检测。实验结果表明,测定罗红霉素的线性范围为1.5~600 mg/L,土霉素、四环素和金霉素的线性范围为0.25~100 mg/L,相关系数为0.9995~0.9999。畜禽粪便中4种抗生素的检出限为0.06~0.38 mg/kg(S/N=3),定量限为0.2~1.2 mg/kg(S/N=10)。基质加标回收率为52.2%~64.7%,相对标准偏差为7.3%~8.4%。  相似文献   

5.
建立了鸭蛋中二甲胺四环素、土霉素、四环素、去甲基金霉素、盐酸金霉素、甲烯土霉素、多西环素等7种四环素类药物残留的UPLC-MS/MS检测方法。样品经10%三氯乙酸溶液提取,Cleanert PEP固相萃取柱净化,0.1%甲酸水溶液-乙腈作为流动相进行梯度洗脱,UPLC-MS/MS测定。7种四环素类药物残留在10~100 ng/mL范围内线性关系良好,平均加样回收率在84.3%~94.1%之间,相对标准偏差在1.7%~7.7%之间,检出限为0.2~1μg/kg,精密度为0.9%~2.7%。方法能够对鸭蛋中四环素类药物残留进行分析。  相似文献   

6.
建立了固相萃取-高效液相色谱同时测定乳及乳制品中土霉素、四环素和金霉素的方法。样品经pH 4.0的Na2EDTA-mcllvaine缓冲溶液漩涡超声提取后,采用Oasis HLB固相萃取(SPE)小柱净化,洗脱液用N2吹至近干后用流动相溶解并定容,过PTFE滤膜后在Shiseido MG C18色谱柱上,以V(乙腈):V(10 mmol/L草酸)=27∶73的溶液为流动相进行分离,检测波长为360 nm。在最优的色谱条件下,各目标化合物的加标回收率为83.0%~109.2%,相对标准偏差在2.8%~6.1%之间。3种抗生素含量在0.10~20.0 mg/L范围内线性关系良好,相关系数≥0.999,乳及乳制品中土霉素、四环素和金霉素的检出限分别为10,10和20μg/kg。  相似文献   

7.
饲料中四环素类药物含量的高效液相色谱测定   总被引:1,自引:1,他引:0  
建立了高效液相色谱法测定饲料中四环素类药物含量的方法。样品经甲醇-盐酸溶液提取,WatersOasis HLB固相萃取柱净化,进行HPLC分析。标准校正曲线线性范围为0.05~2.0 mg/L,相关系数r>0.999。饲料中土霉素、四环素、金霉素和强力霉素的定量下限(LOQ)依次是2.0、2.0、4.0和4.0 mg/kg;不同添加水平样品加标回收率为78%~103%,RSD小于11%。  相似文献   

8.
《色谱》2016,(4)
建立了磁性固相萃取-高效液相色谱-串联质谱同时测定环境水样中四环素类抗生素的方法。以6种四环素类抗生素(差向四环素、土霉素、四环素、去甲金霉素、金霉素和脱水四环素)为目标化合物,考察并优化了吸附和解吸条件,确定了最佳萃取条件。萃取后的目标化合物经ZORBAX Eclipse Plus C18柱分离,用高效液相色谱-串联质谱在多反应监测(MRM)模式下进行检测。在优化的条件下,6种四环素在1~100μg/L范围内线性关系良好,线性相关系数为0.996 7~0.999 3,检出限为2.44~25.21 ng/L,样品加标回收率为80.6%~90.0%,日内相对标准偏差(RSDs)为0.6%~2.5%,日间RSDs为1.1%~7.1%。该方法灵敏度高、背景干扰低,适用于环境水样中6种痕量四环素类抗生素的同时检测。  相似文献   

9.
采用Agilent公司的增强型脂质去除产品Bond Elut EMR-Lipid,建立了针对猪肉中四环素类药物残留的更快更高效的Qu ECh ERS样品前处理方法。样品经酸化乙腈提取,Bond Elut EMR-Lipid Qu ECh ERS净化后,采用HPLC-MS/MS检测,方法检出限可达5.0μg/kg;四环素、金霉素和强力霉素的回收率为75.6%~89.4%,土霉素的回收率为53.4%~61.0%,相对标准偏差均不大于7.7%。  相似文献   

10.
建立了一种反相高效液相色谱-二极管阵列检测器同时测定祛痘类化妆品中美满霉素、土霉素、四环素、金霉素、多西环素、氯霉素及甲硝唑的分析方法。样品用0.1 mol/L HCl-甲醇提取,采用Agilent SB-C18色谱柱分离,以甲醇、乙腈和0.005 mol/L草酸为流动相进行梯度洗脱,二极管阵列检测器检测,检测波长268 nm,以保留时间和特征光谱图定性,外标法定量。结果表明,7种化合物在0.5~100 mg/L均与其各自对应的峰面积呈良好线性关系(r≥0.9992),方法定量限(S/N=10)为1.0~10.0 mg/kg,回收率在80.5%~112.8%之间,精密度在6.4%~13%之间。该方法适用于祛痘化妆品中6种抗生素及甲硝唑的检测。  相似文献   

11.
A selective and accurate LC/MS/MS method for the simultaneous determination of chlortetracycline (CTC), oxytetracycline (OTC), tetracycline (TC), and doxycycline (DC) in animal feeds was developed. Samples were extracted with Na2EDTA-McIlvaine buffer and further purified with Oasis HLB SPE columns. The purified extract was separated on an Xbridge C18 column and detected by LC/MS/MS with positive electrospray ionization in the multiple reaction monitoring mode. This method provided average recoveries of 80.9 to 119.5%, with CVs of 1.7 to 9.8% in the range of 0.5 to 50 mg/kg CTC, OTC, TC, and DC in feeds, except the average recovery of CTC was 76.0%, with a CV of 14.6% in pig feed spiked with 0.5 mg/kg CTC. The linear ranges for the four TCs determined by LC/MS/MS ranged from 0.005 to 2.5 microg/mL with a linear correlation coefficient (R2) >0.99. The LOD and LOQ for CTC, OTC, TC, and DC in pig and poultry feeds ranged from 0.003 to 0.02 and 0.01 to 0.05 microg/g, respectively. The method was successfully applied for the analysis of 30 real feed samples, and no illegal use was detected.  相似文献   

12.
A chromatographic procedure for the determination of oxytetracycline (OTC), tetracycline (TC), chlorotetracycline (CTC), and doxycycline (DC) in medicated feedingstuffs was developed. Samples were extracted with 0.01 M citric buffer/acetonitrile (pH 3.0) and further purified with 0.45 μm syringe filters. The purified extract was separated on Thermo column C18, 150?×?4 mm, 5 μm and detection was carried out at 360 nm for OTC, and TC, 370 nm for CTC, and 350 nm for DC. TCs were eluted with a mobile phase of 0.03 M SDS/7 % 1-butanol/0.02 M oxalic acid/NaOH at pH 2.5. This method provided average recoveries of 80.4 % to 100.2 %, with CVs of 0.5 % to 6.6 % in the range of 50 to 1500 mg/kg OTC, TC, CTC, and DC in feeds. The linearity for the four TCs was determined by high-performance liquid chromatography-diode array detector (HPLC-DAD) in the range 10–300 μg/mL (50–1500 mg/kg), with a linear correlation coefficient (R)?>?0.99. The LOD and LOQ for TCs in pig and poultry feeds ranged from 4.0 to 10.7 and 4.7 to 12.6 mg/kg, respectively. The methodology was applied to the analysis of animal feedingstuffs collected from poultry and pig farms.
Figure
Extraction procedure and chromatographic condition for the isolation TCs from animal medicated feedingstuffs  相似文献   

13.
建立了柱切换反相高效液相色谱法直接进样分离、测定蜂蜜中3种四环素族抗生素(土霉素OTC、四环素TC、金霉素CTC)残留量的分析方法。方法包括:用缓冲溶液溶解样品、直接进样、二次蒸馏水作流动相在C18预柱上在线富集和净化,然后用柱切换阀将预柱与一个C18分析柱接通,草酸溶液-乙腈-甲醇作流动相、紫外检测器在350nm处检测。各组分回收率均大于85%;相对标准偏差小于10%;标准曲线的相关系数在0.9983~0.9991之间;最低检出浓度(≤0.02mg/kg),满足欧盟和日本等国要求(0.05mg/kg)。  相似文献   

14.
A survey was conducted to determine the incidence of tetracycline antibiotic (TCAs) residues in the kidneys of slaughtered animals that did not pass inspection for human consumption by the Japanese Food Sanitation Law and the Meat Inspection Law at the slaughterhouses in Aichi Prefecture, Japan, from April 1985 to March 1998. The kidneys were analyzed by the AOAC Official Method 995.09. Among 424 animals (147 cattle and 277 pigs), 131 (30.9%) were contaminated with TCAs, including 69 (16.3%) with chlortetracycline (CTC), 61 (14.4%) with oxytetracycline (OTC), 3 (0.7%) with tetracycline (TC), and 1 (0.2%) with doxycycline (DC). One sample (cattle kidney) was contaminated with both OTC and DC. The frequencies of OTC and TC residues were significantly higher (p < 0.05) in cattle than in pigs, whereas, the frequency of CTC was significantly higher (p < 0.01) in pigs. Pig kidney samples collected in 1991-1997 had significantly higher incidences of TCAs and CTC (p < 0.01) residues than those in 1985-1986.  相似文献   

15.
A simple, rapid and precise analytical method for tetracycline (TC) residues in the liver of slaughtered animals has been established. The recoveries of oxytetracycline (OTC), TC, chlortetracycline (CTC) and doxycycline (DC) from beef liver spiked at the level of 1.0 ppm were 87.7, 87.5, 79.6 and 67.5% with coefficients of variations of 1.01-2.87%. Detection limits in beef liver were 0.05 and 0.1 ppm for OTC and TC and for CTC and DC, respectively. It is also possible to apply this method to the analysis of residual TCs in various foods with the same recovery, accuracy and detection limits as in the case of beef liver.  相似文献   

16.
An HPLC method with diode-array detection, at 355 nm, was developed and validated for the determination of seven tetracyclines (TCs) in milk: minocycline (MNC), TC, oxytetracycline (OTC), methacycline (MTC), demeclocycline (DMC), chlortetracycline (CTC), and doxycycline (DC). Oxalate buffer (pH 4) was used with 20% TCA as a deproteinization agent for the extraction of analytes from milk followed by SPE. The separation was achieved on an Inertsil ODS-3, 5 microm, 250 x 4 mm(2 )analytical column at ambient temperature. The mobile phase, a mixture of A: 0.01 M oxalic acid and B: CH(3)CN, was delivered using a gradient program. The procedure was validated according to the European Union decision 2002/657/EC determining selectivity, stability, decision limit, detection capability, accuracy, and precision. Mean recoveries of TCs from spiked milk samples (50, 100, and 200 ng/g) were 93.8-100.9% for MNC, 96.8-103.7% for OTC, 96.3-101.8% for TC, 99.4-107.2% for DMC, 99.4-102.9% for CTC, 96.3-102.7% for MTC, and 94.6-102.1% for DC. All RSD values were lower than 8.5%. The decision limits CC(a) calculated by spiking 20 blank milk samples at MRL (100 microg/kg) ranged from 101.25 to 105.84 microg/kg, while detection capability CC(b )from 103.94 to 108.88 microg/kg.  相似文献   

17.
A simple, rapid and precise analytical method for the residual tetracyclines in honey has been established using a tandem cartridge clean-up system (prepacked reversed-phase and ion-exchange cartridges) followed by high-performance liquid chromatography. The recoveries of oxytetracycline (OTC), tetracycline (TC), chlortetracycline (CTC) and doxycycline (DC) from honey spiked at a level of 1.0 ppm are 87.1, 85.3, 98.0 and 99.0%, respectively, with coefficients of variation of 1.1-3.9%. The detection limits in honey are 0.02 ppm for OTC and TC, and 0.05 ppm for CTC and DC, respectively. The time required for the analysis of four samples is only 1 h.  相似文献   

18.
A multiresidue method for isolation and liquid chromatographic determination of oxytetracycline (OTC), tetracycline (TC), and chlortetracycline (CTC) in milk is presented. The sensitivity of the method is adequate to meet the needs of regulatory agencies. The European Community established 100 micrograms/kg as the maximum residue limit (MRL) in milk for TC, CTC, and OTC. Recoveries exceeded 80% for all tetracyclines at all levels, with good precision. Correlation coefficients of standards curves for individual tetracyclines isolated from fortified samples ranged from 0.991 for CTC to 0.998 for OTC. Other antibiotics that might interfere with analysis did not interfere with elution times of OTC, TC, and CTC. The procedure is rapid, precise, and quantitative and requires minimal preparation and minimal use of organic solvents. It can be applied to routine surveillance programs. We can prepare 10 samples for analysis in about 1.45 h.  相似文献   

19.
TY Ma  TW Vickroy  JH Shien  CC Chou 《Electrophoresis》2012,33(11):1679-1682
A NACE method with laser-induced fluorescence detection was modified for sensitive detection of 4 tetracyclines (TCs) in biological samples and feeds. The changes in injection mode, injection times, id of capillary, excitation wavelength, and the use of surfactant and sample stacking technique all contributed to improved LODs of TCs to sub-ng/mL level. With the optimized conditions, the instrumental LODs could reach 1.33 ng/mL for chlorotetracycline (CTC) and 13.3 ng/mL for TC, oxytetracycline (OTC), and doxycycline (DC), an improvement of 10-100-fold over past studies. A simple SPE procedure was further developed for the extraction and concentration of TCs in plasma, urine, feed, and milk. Taken together, the instrumental LOD and feasible SPE concentration factors the overall LODs for CTC could reach 65 pg/mL in feed and milk and 260 pg/mL in plasma and urine. Detection limits for TC, OTC, and DC at sub-ng/mL level were also achieved. The modified CE-LIF method was found to be less complicated and more sensitive than the best current methods using UV or LIF detection, and has been applied successfully to assess oral absorption of DC in swine and chickens and to confirm suspected TC-positive bovine serum samples.  相似文献   

20.
建立了一种专属、灵敏的方法,用于同时检测鸡肌肉组织中土霉素、四环素和金霉素的残留。首先对鸡肌肉组织中的四环素类药物进行提取,再经C18固相萃取柱净化,采用电喷雾离子源,以正离子检测方式进行质谱分析。实验结果表明,在25~500 μg/L这一质量浓度范围内上述3种四环素类药物均呈线性,其相关系数r>0.99。在低、中、高3个质量浓度添加水平,3种四环素类药物的平均回收率为72.4%~94.9%,相对标准偏差小于11%。3种四环素类药物的检测限均可达到10 μg/kg。其方法学考察符合农牧发[2003]1号文件的有关规定。  相似文献   

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