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应用超高效液相色谱-串联质谱技术,建立了兽用中药制剂穿心莲注射液和鱼腥草注射液中非法添加庆大霉素的检测方法。样品经水溶解后,稀释。采用20mmol/L HFBA乙腈与20mmol/L HFBA水溶液作为流动相进行梯度洗脱,经ACQUITY HSS PFP色谱柱分离,通过多反应监测模式进行测定。庆大霉素在0.04~2 μg/mL的范围内线性关系良好,相关系数0.9994。平均回收率为98.2%~100.3%,相对标准偏差均小于2.4%。检测限为0.2%,定量限为0.4%,该法准确、简单、快速。 相似文献
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本研究建立了一种固相萃取法结合液相色谱-串联质谱技术测定饲料中庆大霉素含量的方法。采用5%三氯乙酸提取液提取饲料样品,用PCX固相萃取柱净化,使用液相色谱-串联质谱检测,以2 mmol/L甲酸铵-0.1%甲酸溶液(A)-乙腈(B)为流动相,梯度洗脱,Agilent SBAq色谱柱分离。庆大霉素含量在1.0~100.0 mg/L线性关系良好(R2>0.995);方法的检出限为0.03 mg/kg,定量限为0.1 mg/kg;庆大霉素在3个添加水平(1.0、10.0、100.0 mg/kg)下的平均回收率为81.5%~123.6%,相对标准偏差<15%。该方法易于使用,预处理简单,适用于测定饲料中的庆大霉素含量。 相似文献
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建立了兽用林可霉素注射液中非法添加盐酸左旋咪唑的高效液相色谱检测方法。采用Waters Atlantis? T3 C18(4.6×250mm, 5μm)色谱柱分离,以磷酸二氢钠溶液-甲醇(70:30)作为流动相进行等度洗脱(流速1.00mL/min),用二极管阵列检测器在230nm波长处进行测定。考察了此色谱条件下方法的专属性、线性、回收率、精密度、检测限和耐用性。结果表明,盐酸左旋咪唑在进样浓度为0.02mg/mL~0.4mg/mL时呈良好的线性关系,R2=0.9999;重复性试验RSD为0.6%;平均回收率为99.7%;检测限为 0.0002mg/mL,定量限为0.0016mg/mL。该法准确、简便、可行,适用于林可霉素注射液中盐酸左旋咪唑的检测。 相似文献
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本文应用超高效液相色谱-串联质谱技术,建立了饲料中喹烯酮和喹乙醇的检测方法。样品经0.1%甲酸乙腈溶液提取后,通过PRiME HLB固相萃取柱净化;采用0.1%甲酸乙腈溶液作为流动相进行梯度洗脱,经AtlantisT3色谱柱分离,通过多反应监测模式进行测定。在5~500 ng/mL时线性关系良好,相关系数均大于0.996。在0.2、0.4、2 mg/kg添加水平下,平均回收率为80%~95.5%,相对标准偏差均小于10%。检测限为0.06 mg/kg,定量限为0.2 mg/kg,该法准确、简单、快速。 相似文献
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应用高效液相色谱技术,建立了育肥猪配合饲料中孟布酮的检测方法。样品经乙腈提取后,通过WAX固相萃取柱净化;采用0.5%磷酸乙腈溶液作为流动相进行梯度洗脱,经C18色谱柱分离,通过二极管阵列检测器进行测定。在0.2~10μg/mL的范围内线性关系良好,相关系数大于0.999。在0.2,0.4,2 mg/kg添加水平下,平均回收率为78.1%~90.6%,相对标准偏差均小于10%。检测限为0.06 mg/kg,定量限为0.2 mg/kg,该法准确、简单、快速。 相似文献
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建立超高效液相色谱-光电二极管阵列法(UPLC-PDA)测定头孢噻呋晶体注射液中主成分头孢噻呋的含量。采用反相超高效液相色谱法对头孢噻呋进行色谱分离和快速定量测定。以ACQUITY UPLC~(TM)C8色谱柱(2.1 mm×100 mm,1.7μm)为分离柱,柱温:35℃;以乙腈-水(0.1%甲酸)进行梯度洗脱;流速:0.35 mL/min;进样量:1μL;检测波长为292 nm。通过光谱图、保留时间和峰面积参数对头孢噻呋进行定性、定量检测。头孢噻呋在4~200μg/mL的范围内线性关系良好(R~20.9998);方法检测限为2μg/mL、定量限为4μg/mL,完全满足检测需求。该方法色谱分离较好,分析速度较快,前处理简单,适用于头孢噻呋晶体注射液中主成分头孢噻呋含量的检测。 相似文献
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试验旨在使用高效液相色谱法同时测定液体酸化剂中甲酸、乙酸、丙酸、丁酸的含量。经过色谱条件优化比较,确立了最佳色谱条件为:采用Atlantis T3柱(250 mm×4.6 mm,5μm)作为色谱柱,柱温30℃,流动相使用乙腈和20 mmol/L的KH2PO4缓冲盐溶液(pH值2.9)进行梯度洗脱,流速为1 mL/min,紫外检测波长220 nm,进样量20μL。结果显示,4种有机酸分离良好,线性范围广,相关系数为0.999 7~1.000 0,检出限为0.26~0.53 mg/L,定量限为0.70~2.65 mg/L,加标回收率在94.1%~101.2%之间,相对标准偏差(RSD)均小于1.93%。研究表明,高效液相色谱法高效快捷、定量准确,适用于液体酸化剂中有机酸的检测。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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以国际标准强毒R株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离MG,并收集感染鸡所产蛋分离MG。结果表明,人工感染48小时后上、下呼吸道及肺已被全面感染,96小时气囊已被感染,120小时输卵管已能分离到MG,卵巢始终分离不到MG。人工感染鸡自144小时便能在其所产蛋中分离出MG。药物治疗能在72小时内消除感染,油乳剂苗则需24天后逐渐降低蛋内MG分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内MG,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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本试验旨在研究两种绿头鸭(白羽绿头鸭和绿头鸭)肌肉营养组成和价值,为绿头鸭肉产品的开发利用提供基础数据和理论依据。选择白羽绿头鸭和绿头鸭60只(每个品种各30只,公母各半),依照国家标准测定胸肌粗蛋白质、粗脂肪、胆固醇含量及氨基酸、脂肪酸、微量元素和维生素的组成和含量,并对胸肌进行氨基酸评价及脂肪酸营养价值评价。结果显示,白羽绿头鸭肌肉粗蛋白质含量显著低于绿头鸭(P<0.05);两种绿头鸭肌肉中均检测到17种含量大于0.01%的氨基酸,其中白羽绿头鸭肌肉苏氨酸、组氨酸、丝氨酸和脯氨酸含量显著高于绿头鸭(P<0.05),赖氨酸、谷氨酸和精氨酸含量显著低于绿头鸭(P<0.05);检测到13种含量均大于0.01%的脂肪酸,其中白羽绿头鸭硬脂酸和油酸含量显著低于绿头鸭(P<0.05);检测到9种矿物质元素(钠、镁、钾、钙、锰、铁、铜、锌和硒),两种绿头鸭差异不显著(P>0.05);检测到8种维生素,白羽绿头鸭肌肉维生素B1含量显著高于绿头鸭(P<0.05),维生素D和维生素E含量显著低于绿头鸭(P<0.05)。两种绿头鸭肌肉氨基酸比例接近世卫组织推荐的理想模式,富含人体所需的矿物质元素和维生素,具有广阔的开发利用前景。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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Reasons for performing study: Clinical experiences indicate that centesis of the lateral compartment of the femorotibial joint is often unsuccessful. Objective: To determine the accuracy of 2 published and 2 unpublished techniques of centesis of the lateral compartment of the femorotibial joint. Hypothesis: It was hypothesised that a drug can be administered into the lateral compartment of the femorotibial joint via a diverticulum of this joint that surrounds the medial aspect of the long digital extensor tendon and that this technique is more accurate than described techniques of centesis of this compartment. Methods: Twenty‐four stifles of 12 horses were divided equally into 4 groups and a radiocontrast medium injected into the lateral compartment of the femorotibial joint of each group using a hypodermic needle inserted: 1) caudal to the lateral patellar ligament and proximal to the tibial plateau, 2) caudal to the long digital extensor tendon and proximal to the tibial plateau, 3) between the long digital extensor tendon and bone of the extensor groove of the tibia or 4) directly through the long digital extensor tendon until it contacted bone. Twelve veterinary students who had no experience using any of these techniques performed the injections. Accuracy of each technique was determined by examining radiographs obtained after injecting the contrast medium. Results: The most successful technique for arthrocentesis was by inserting a needle through the long digital extensor tendon. This approach was successful in all attempted cases, whilst other techniques had lower rates of success. Conclusions: The lateral compartment of the femorotibial joint can be accessed accurately by inserting a needle through the long digital extensor tendon as it lies within the extensor groove. Other techniques may not be as accurate for clinicians inexperienced in arthrocentesis of the lateral compartment of the femorotibial joint. 相似文献
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Marioni-Henry K Vite CH Newton AL Van Winkle TJ 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2004,18(6):851-858
A retrospective review of records of 205 cats with histologically confirmed disease of the spinal cord was performed to identify the prevalence of disease in this nonrandomly selected population of cats. Clinical records were reviewed, and age, duration of neurologic illness, and clinical and histopathologic findings in cats with spinal cord disease were abstracted. Disease processes were classified into 7 categories and 23 groups. The most common diseases affecting the spinal cord of cats were feline infectious peritonitis (FIP), lymphosarcoma (LSA), and neoplasia of the vertebral column secondarily affecting the spinal cord. Information on age, onset and duration of clinical signs, and lesion localization at the postmortem examination in cats belonging to the 7 categories of disease were analyzed to create a practical list of differential diagnoses. Cats were also subcategorized into 3 groups based on their age at death. FIP was the most common disease of cats younger than 2 years of age. LSA and vertebral column neoplasia were the most common diseases affecting cats between 2 and 8 years of age. Vertebral column neoplasia was the most common disease affecting cats older than 8 years of age. Results of this histopathologic study showed that FIP and LSA were the most common disease processes affecting the spinal cord of cats. However, at least 21 other groups of diseases and their relative prevalence were identified. 相似文献
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应用光镜和透射电镜技术,观察了3~6月龄比格犬甲状腺的显微和超微结构。结果表明,比格犬甲状腺实质由滤泡和滤泡旁细胞构成。滤泡呈圆形或椭圆形,直径20.22~220.00μm,平均90.80μm;由单层立方上皮细胞围成,细胞高度3.04~7.11μm,平均5.18μm,电镜下可见功能状态不同的两型滤泡上皮细胞;滤泡旁细胞很多,直径4.40~8.82μm,平均6.23μm,位于滤泡之间或镶嵌于滤泡上皮细胞之间,也可聚集在一起形成滤泡样结构,胞质内含有大量的分泌颗粒,电镜下也可见两种类型的滤泡旁细胞。 相似文献
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根据JJF1059-1999《测量不确定度评定与表示》建立了高效液相色谱法测定鸡肉中土霉素残留测量的不确定度评定方法,评定过程包括建立测量程序、分析不确定度来源、对不确定度分量进行量化。将不确定度归类为两大类。随机效应导致的不确定度可以通过一系列具有统计意义的重复观测值进行A类评定;系统效应导致的不确定度通过各测量器具、设备的说明书、校准证书提供的参数进行B类评定。本方法鸡肉中土霉素残留量的相对合成标准不确定度约为3.9%。 相似文献