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1.
鸡蛋中氟喹诺酮类药物残留量检测方法研究   总被引：4，自引：1，他引：3  
建立一种可同时检测鸡蛋中四种氟喹诺酮类药物(环丙沙星、达氟沙星、恩诺沙星和沙拉沙星)残留的高效液相色谱-荧光检测法。结果表明,四种氟喹诺酮类药物中环丙沙星、恩诺沙星、沙拉沙星在2~500 ng/mL范围内峰面积与浓度呈良好的线性关系,R2均大于0.9999;达氟沙星在0.4~100 ng/mL范围内峰面积与浓度呈良好的线性关系,R2大于0.9999。环丙沙星、恩诺沙星、沙拉沙星的定量限为10μg/kg,达氟沙星的定量限为2μg/kg。环丙沙星、恩诺沙星、沙拉沙星在10~200μg/kg的浓度添加水平上,其回收率为70%~100%;达氟沙星在2~40μg/kg的浓度添加水平上,其回收率为70%~100%,批内、批间的相对标准偏差均小于10%。  相似文献   

2.
建立了一种可同时检测羊奶中五种氟喹诺酮类药物(环丙沙星、达氟沙星、恩诺沙星、沙拉沙星、二氟沙星)残留的高效液相色谱—荧光检测法。羊奶样品经乙腈提取,正己烷去脂肪,C18柱净化。以0.05 mol/L磷酸三乙胺溶液和乙腈溶液为流动相,流速为0.8 m L/min,激发波长280 nm,发射波长450 nm。结果表明环丙沙星、恩诺沙星、沙拉沙星、二氟沙星在10~200 ng/m L,达氟沙星在2~40 ng/m L呈良好的线性关系,R2均大于0.999。环丙沙星、恩诺沙星、沙拉沙星、二氟沙星的最低定量限为30μg/kg,达氟沙星的最低定量限为6μg/kg。环丙沙星、恩诺沙星、沙拉沙星、二氟沙星在30~200μg/kg的浓度添加水平上,达氟沙星在6~40μg/kg的浓度添加水平上其回收率均在70~100%,批内、批间的相对标准偏差小于20%。该方法简单快速、灵敏度高、重复性好,适用于羊奶中五种氟喹诺酮类药物残留检测。  相似文献   

3.
为了建立一种同时测定牛奶中4种氟喹诺酮类药物(恩诺沙星、环丙沙星、沙拉沙星、二氟沙星)多残留高效液相色谱检测方法,将牛奶中的残留药物用磷酸-甲醇溶液重复提取2次,正己烷除去脂肪净化后浓缩,流动相溶解后用高效液相色谱-荧光检测器测定。结果表明,4种氟喹诺酮类药物在0.01~1.00μg/mL浓度范围内具有良好的线性关系(R=0.999 9),在0.01,0.05,0.10,0.50μg/mL和1.00μg/mL 5个浓度添加水平上,平均回收率为77%~93%,样品的批内和批间变异系数均值分别为5.29%和7.83%,定量限均为10 ng/mL。环丙沙星、恩诺沙星、沙拉沙星检测限均为5 ng/mL,二氟沙星检测限为8 ng/mL。本研究建立的检测方法简单、快速、灵敏度和回收率高,适用于牛奶中4种氟喹诺酮类药物残留检测。  相似文献   

4.
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   

5.
建立了猪、牛、羊、鸡、兔的肌肉、脂肪、肝脏和肾脏四种组织中环丙沙星、达氟沙星、恩诺沙星、沙拉沙星和二氟沙星残留量检测的高效液相色谱法。试样经磷酸盐溶液提取,C18固相萃取柱浓缩净化后,用高效液相色谱分析,荧光检测器检测,外标法定量。5种药物在0.1～100μg/L浓度范围内线性关系良好。环丙沙星、恩诺沙星、沙拉沙星和二氟沙星在五种动物肌肉、脂肪组织中的定量限为5μg/kg,在肝脏、肾脏组织中的定量限为10μg/kg;达氟沙星在肌肉、脂肪组织中的定量限为1μg/kg,在肝脏、肾脏组织中的定量限为2μg/kg。在指定的三个浓度添加水平下,5种药物在各组织中的平均回收率为62%～103%;批内变异系数为0.30%～18%,批间变异系数为1.0%～17%。该方法操作简单,准确度和精密度好,动物品种及动物组织覆盖范围广,可以很好地满足实际检测工作的需要。  相似文献   

6.
孙雷 《中国兽药杂志》2008,42(11):16-19
建立了牛奶中氧氟沙星、诺氟沙星、环丙沙星、恩诺沙星、达氟沙星、二氟沙星和沙拉沙星等七种氟喹诺酮类药物(FQs)残留检测的高效液相色谱-串联质谱(HPLC-MS/MS)方法。液相色谱条件为:色谱柱Waters XBridge C18柱(150 mm×2.1 mm,5μm);流动相为0.1%甲酸甲醇溶液 0.1%甲酸水溶液,梯度洗脱;柱温为35℃;流速为0.2 mL/min;进样量为20μL。质谱条件为:电喷雾离子源(ESI ),多反应监测(MRM)方式进行采集;外标法定量。结果表明:七种FQs在5~250 ng/mL浓度范围内呈现良好的线性关系,相关系数R2均大于0.997;方法检测限为2 ng/mL,定量限为5 ng/mL;从10、20和100 ng/mL三个添加浓度检测结果可以看出,方法平均回收率为70.2%~119%,批内RSD为1.8%~16%,批间RSD为9.1%~18%。  相似文献   

7.
建立了猪肉组织中氧氟沙星、诺氟沙星、环丙沙星、恩诺沙星、达氟沙星、二氟沙星和沙拉沙星7种氟喹诺酮类药物残留检测的高效液相色谱-串联质谱方法。液相色谱条件为：色谱柱为XBridge C18柱（150×2.1mm,5µm）;流动相为0.1％甲酸甲醇溶液＋0.1％甲酸水溶液,梯度洗脱;柱温为30℃;流速为0.2mL/min;进样量为20µL。质谱条件为：电喷雾离子源（ESI＋）,多反应监测（MRM）方式采集。以诺氟沙星-D5作内标,内标法定量。结果表明：7种FQs药物在5～250ng/mL浓度范围内呈现良好线性关系,相关系数R2均大于0.997;方法检测限为5ng/g,定量限为10ng/g;从10、20和100ng/g三个添加浓度检测结果可以看出,方法平均回收率为80.7%～116%（n＝6）,批内批间RSD均小于20％。  相似文献   

8.
建立了一种使用新型反相固相萃取吸附剂(PRiME HLB)的前处理净化流程,采用高效液相色谱-荧光检测器同时测定鸡蛋中环丙沙星、达氟沙星、恩诺沙星和沙拉沙星残留量的方法。试样经乙腈∶0.2%甲酸水溶液(80∶20)提取,PRiME HLB固相萃取柱净化后进行测定,外标法定量。实验结果表明:(1)在鸡蛋中环丙沙星、恩诺沙星和沙拉沙星的检测限为0.75μg/kg,达氟沙星的检测限为0.15μg/kg;在0.005~0.5μg/mL质量浓度范围(达氟沙星在0.001~0.2μg/mL浓度范围)内线性回归关系良好(r0.99999)。(2)环丙沙星、恩诺沙星和沙拉沙星的添加量为0.005、0.05、0.5μg/mL(达氟沙星0.001、0.02、0.2μg/mL)时,方法的添加回收率在74.24%~98.78%,RSD5.15%。本方法适用于鸡蛋中4种氟喹诺酮类药物残留量的测定。  相似文献   

9.
试验为建立1种采用高效液相色谱法检测猪肉组织中环丙沙星(CIP)、达氟沙星(DFLX)、恩诺沙星(ENR)、沙拉沙星(SAR)残留量的方法。按照农业农村部标准方法进行优化,猪肉样品经磷酸盐溶液提取,固相萃取柱浓缩净化,使用高效液相色谱分析,荧光检测器检测,外标法定量。结果表明:环丙沙星、恩诺沙星、沙拉沙星在5～500μg/L浓度范围内,达氟沙星在1～100μg/L线性关系良好。猪肉中环丙沙星、恩诺沙星、沙拉沙星检出限为5μg/L,达氟沙星检出限为1μg/L。在指定的高、中、低3个浓度添加水平下,4种药物在猪肉的回收率为66.1%～107.9%;批内变异系数为1.3%～6.4%,批间变异系数为2.8%～7.1%。研究表明,该方法操作简单、准确度和精密度较好、实用性强、灵敏度高,可以满足猪肉样品中氟喹诺酮类4种药物残留检测的需要。  相似文献   

10.
为快速检测食源性动物中沙拉沙星及二氟沙星的药物残留,将沙拉沙星单克隆抗体(SAR-Ab)与辣根过氧化物酶(HRP)偶联得到酶标抗体(McAb-HRP),从而建立直接竞争化学发光酶联免疫(dc-CLEIA)检测方法。结果显示:经紫外扫描鉴定,McAb-HRP偶联成功;以包被抗原(SAR-1-OVA)浓度1.25μg/mL,McAb-HRP稀释比1∶8 000作为最佳工作条件,从而建立了dc-CLEIA分析法;精密度的平均批内批间变异系数均低于7%;建立的标准曲线呈线性关系,线性范围为0.312～20 ng/mL,回归方程式y=-0.373x+0.688(R~2=0.985),经计算其灵敏度IC_(50)为3.19 ng/mL;除二氟沙星外与其他氟喹诺酮类药物的交叉反应率均低于8%,与其他种类的抗生素均无交叉反应;沙拉沙星和二氟沙星在鸡肉样品中的最低检出限分别为1.25、1.36μg/kg;沙拉沙星和二氟沙星在鸡肉样品中的添加回收率分别为88.2%～108.3%、93.36%～102.7%,且其变异系数均≤13.4%。结果表明:此方法不仅快速且灵敏度高,可作为沙拉沙星及二氟沙星药物残留的定量检测方法。  相似文献   

11.
试验选用96头平均体重14.82 kg左右的杜×长×大断奶仔猪,随机分成4组,每组3栏,每栏8头(公母各半)。对照组饲喂基础日粮,试验1、2、3组分别添加1%80目白术、0.2%白术多糖和1%微米白术。试验期30 d。结果表明:在生长性能方面,与对照组相比,1%微米白术添加组可显著提高日增重(P0.05)、降低饲料增重比和腹泻率,而且效果优于1%80目白术组和0.2%白术多糖组,在肠道形态和肠道微生态区系方面,与对照组相比,日粮添加1%80目白术、0.2%白术多糖、1%微米白术均可不同程度的提高十二指肠和空肠的绒毛高度,加深十二指肠和空肠的隐窝深度,并且增加肠道微生态区系的多样性,其中以1%微米白术添加组的效果最佳。  相似文献   

12.
Sissay, M.M., Uggla, A. and Waller, P.J., XXXX. Prevalence and seasonal incidence of nematode parasites and fluke infections of sheep and goats in eastern Ethiopia. Tropical Animal Health and Production, XXXX. A 2-year abattoir survey was carried out to determine the prevalence, abundance and seasonal incidence of gastro-intestinal (GI) nematodes and trematodes (flukes) of sheep and goats in the semi-arid zone of eastern Ethiopia. During May 2003 to April 2005, viscera including liver, lungs and GI tracts were collected from 655 sheep and 632 goats slaughtered at 4 abattoirs located in the towns of Haramaya, Harar, Dire Dawa and Jijiga in eastern Ethiopia. All animals were raised in the farming areas located within the community boundaries for each town. Collected materials were transported within 24 h to the parasitology laboratory of Haramaya University for immediate processing. Thirteen species belonging to 9 genera of GI nematodes (Haemonchus contortus, Trichostrongylus axei, T. colubriformis, T. vitrinus, Nematodirus filicollis, N. spathiger, Oesophagostomum columbianum, O. venulosum, Strongyloides papillosus, Bunostomum trigonocephalum, Trichuris ovis, Cooperia curticei and Chabertia ovina), and 4 species belonging to 3 genera of trematodes (Fasciola hepatica, F. gigantica, Paramphistomum {Calicohoron} microbothrium and Dicrocoelium dendriticum) were recorded in both sheep and goats. All animals in this investigation were infected with multiple species to varying degrees. The mean burdens of adult nematodes were generally moderate in both sheep and goats and showed patterns of seasonal abundance that corresponded with the bi-modal annual rainfall pattern, with highest burdens around the middle of the rainy season. In both sheep and goats there were significant differences in the mean worm burdens and abundance of the different nematode species between the four geographic locations, with worm burdens in the Haramaya and Harar areas greater than those observed in the Dire Dawa and Jijiga locations. Similar seasonal variations were also observed in the prevalence of flukes. But there were no significant differences in the prevalence of each fluke species between the four locations. Overall, the results showed that Haemonchus, Trichostrongylus, Nematodirus, Oesophagostomum, Fasciola and Paramphistomum species were the most abundant helminth parasites of sheep and goats in eastern Ethiopia.  相似文献   

13.
Tropical Animal Health and Production -  相似文献   

14.
1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks.  相似文献   

15.
Our particular attention in this article was given to natural mediators for macrophages isolated from the sites of tissue injury. A number of chemotactic factors, which may satisfy many criteria making them acceptable as inflammatory leucocyte chemotactic factors, has been separated. Among them, our laboratory has isolated three macrophage (monocyte) chemotactic factors (MCF-a, -b and -c). Their purification, characterization and functional specificity are discussed.  相似文献   

16.
Human and equine athletes are reported to have a high prevalence of gastric disease, and anecdotal evidence suggests a similar phenomenon applies to racing sled dogs. To investigate the prevalence of gastric disease in racing sled dogs, we conducted 2 gastroscopy studies on dogs competing in the annual Iditarod Sled Dog Race. A pilot study of dogs that were either dropped from the 2000 Iditarod Sled Dog Race because of illness or that finished the race indicated that, approximately 5 days after competing, 10 of 28 dogs (35%) had endoscopic evidence of gastric ulceration, erosion, or hemorrhage. The next year, an endoscopic study of 73 dogs participating in the 2001 Iditarod race was performed in order to evaluate a larger population of dogs. Data from 70 of these dogs could be used; 34 (48.5%) had ulceration, erosion, gastric hemorrhage, or some combination of these findings. When this group of 70 dogs was compared retrospectively to a control group of 87 dogs presented to the Texas A&M University (TAMU) Veterinary Medical Teaching Hospital, the Iditarod sled dogs had a significantly higher prevalence (P = .049) of gastric lesions. These findings suggest that, similar to athletes of other species, elite canine athletes have an increased prevalence of gastric disease compared to the canine population at large.  相似文献   

17.
Continuous rate infusion (CRI) of furosemide in humans is considered superior to intermittent administration (IA). This study examined whether furosemide CRI, compared with IA, would increase diuretic efficacy with decreased fluid and electrolyte fluctuations and activation of the renin-angiotensin-aldosterone system (RAAS) in the horse. Five mares were used in a crossover-design study. During a 24-hour period, each horse received a total of 3 mg/kg furosemide by either CRI (0.12 mg/kg/h preceded by a loading dose of 0.12 mg/kg IV) or IA (1 mg/kg IV q8h). There was not a statistically significant difference in urine volume over 24 hours between methods; however, urine volume was significantly greater after CRI compared with IA during the first 8 hours ([median 25th percentile, 75th percentile]: 9.6 L [8.9, 14.4] for CRI versus 5.9 L [5.3, 6.0] for IA). CRI produced a more uniform urine flow, decreased fluctuations in plasma volume, and suppressed renal concentrating ability throughout the infusion period. Potassium, Ca, and Cl excretion was greater during CRI than IA (1,133 mmol [1.110, 1,229] versus 764 mmol [709, 904], 102.7 mmol [96.0, 117.2] versus 73.3 mmol [65.0, 73.5], and 1,776 mmol [1,657, 2.378] versus 1,596 mmol [1,457, 1,767], respectively). Elimination half-lives of furosemide were 1.35 and 0.47 hours for CRI and IA, respectively. The area under the excretion rate curve was 1,285.7 and 184.2 mL x mg/mL for CRI and IA, respectively. Furosemide CRI (0.12 mg/kg/h) for 8 hours, preceded by a loading dose (0.12 mg/kg), is recommended when profound diuresis is needed acutely in horses.  相似文献   

18.
Genetic variations in chromosome Y are enabling researchers to identify paternal lineages, which are informative for introgressions and migrations. In this study, the male‐specific region markers, sex‐determining region‐Y (SRY), amelogenin (AMELY) and zinc finger (ZFY) were analysed in seven Turkish native goat breeds, Angora, Kilis, Hair, Honaml?, Norduz, Gürcü and Abaza. A SNP in the ZFY gene defined a new haplotype Y2C. All domestic haplogroups originate from Capra aegagrus, while the finding of Y1A, Y1B, Y2A and Y2C in 32, 4, 126 and 2 Turkish domestic goats, respectively, appears to indicate a predomestic origin of the major haplotypes. The occurrence of four haplotypes in the Hair goat and, in contrast, a frequency of 96% of Y1A in the Kilis breed illustrate that Y‐chromosomal variants have a more breed‐dependent distribution than mitochondrial or autosomal DNA. This probably reflects male founder effects, but a role in adaptation cannot be excluded.  相似文献   

19.
The objective of this report was to characterize 20-year changes in proportion of calcium oxalate (CaOx) calculi and struvite calculi in dogs, and associations with breed, age, and sex. In this retrospective study, results of analysis of urinary calculi from dogs were reviewed for specimens received between July 1, 1981, and December 31, 2001. Breed, sex, age, year of submission of the specimen, and mineral type(s) were analyzed statistically. CaOx or Struvite or both were contained in 18,966 of 20,884 (91%) specimens. For both sexes, a 20-year statistically significant increase was observed in the proportion of calculus specimens that contained CaOx. The increase in this proportion was greater in females (1% to 31%) than in males (18% to 82%). From 1998 to 2001, when proportions may have plateaued, the odds of specimens containing CaOx were markedly higher in 18 breeds, markedly lower in 5 breeds, and not significantly different in 13 breeds compared with crossbreds. For both sexes, a 20-year statistically significant decrease was observed in the proportion of calculus specimens that contained struvite. This decrease in proportion was greater for males (79-16%) than for females (97-68%). From 1998 to 2001, when proportions plateaued, the odds of calculi containing struvite were markedly lower in 20 breeds, markedly higher in 1 breed, and not significantly different in 15 breeds when compared with crossbreds. Breed, age, and sex were associated statistically with CaOx or struvite urolithiasis. In conclusion, there appears to have been a long-term increase in the proportion of specimens of canine urinary calculi that contain CaOx as well as a long-term decrease in the proportion of specimens of calculi that contain struvite for both male and female dogs. The rate of change appeared to begin leveling off in the period 1998 to 2001. The recent proportion of dogs with either CaOx- or struvite-associated urolithiasis may depend on breed, age, and sex, and on interactions among these 3 factors.  相似文献   

20.
<正>1.INTRODUCTION Ensuring transportation network security is one Of the most daunting challenges confronting homeland security agencies today.Significant research has been dedicated.To model and analyze the vulnerability of transportation systems,while notably fewer studies propose specific strategies for deploying defensive technologies to safeguard these systems.  相似文献   

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