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液质联用法测定猪肝中β-受体激动剂残留的不确定度评定 总被引：1，自引：1，他引：0
采用超高效液相色谱-串联质谱法(UPLC-MS/MS)测定猪肝中9种β-受体激动剂残留量,对标准溶液、标准曲线、样品称量、称量重复性、定容体积等因素进行分析,通过评定各不确定度分量及标准不确定度,得出9种β-受体激动剂的合成相对标准不确定度为5.60%~8.90%,影响较大的因素为标准曲线和测量重复性。 相似文献
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以市售β_2–受体激动剂酶联免疫检测试剂盒为基础,对采用酶联免疫吸附分析法测定猪、鸡粪便中11种β_2–受体激动剂残留的不确定度进行评估,找到影响不确定度的主要因素,为控制实验过程和评价检测结果可靠性提供依据。本研究对标准溶液配制、样品称量、样品前处理过程、样品添加回收率、酶联免疫吸附分析测试程序、酶标仪吸光度示值误差等测量不确定度来源进行了分析,通过评定各不确定度分量与不确定度大小,得到猪、鸡粪便中11种β_2–受体激动剂扩展不确定度的范围分别在0.25~2.4 ng/g和0.42~1.7 ng/g范围内。由各因素对合成不确定度贡献比的分析可知,标准溶液配制、样品前处理过程、样品添加回收率、酶联免疫吸附分析测试程序、酶标仪吸光度示值误差是主要的影响因素。通过合理地控制各影响因素有利于提高检测结果的准确性与可靠性。 相似文献
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高效液相色谱-串联质谱法测定动物尿液中23种β-受体激动剂 总被引：2，自引：0，他引：2
建立了同时测定动物尿液中23种β-受体激动剂的高效液相色谱-串联质谱检测法.样品用2 mol/L盐酸酸解,经过SLS固相萃取柱净化、富集后,以甲醇和0.2％甲酸水溶液为流动相进行梯度洗脱,采用多反应监测模式进行定性和定量分析.23种β-受体激动剂的定量下限为0.1 ～1.0 μg/L.用猪、牛及羊尿样为研究对象,23种β-受体激动剂在0.5、1.0和10 μg/L三个水平下的平均回收率为68％ ～ 115％,批内相对标准偏差为0.5％ ～9.6％,批间相对标准偏差0.6％ ～ 14.1％.结果表明,该方法具有准确、简便、灵敏,重现性好等特点,能满足β-受体激动剂类药物的残留检测任务. 相似文献
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液相色谱法测定猪鸡可食性组织中四环素类残留量的不确定度评估 总被引：2，自引：2，他引：0
对猪鸡可食性组织中的四种四环素类药物残留量测定方法的不确定度进行评估,对影响四环素类药物残留量测定不确定度的因素,包括标准溶液、称样量、体积、色谱峰面积、浓缩过程及回收率等进行分析,通过计算各不确定度分量及合成标准不确定度,得出四种四环素类药物的扩展不确定度在3.5～5.5 ng/g范围内。由各因素对合成不确定度的贡献比分析可知,影响较大的因素为标准品纯度及回收率。 相似文献
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分析了影响应用高效液相色谱-串联质谱法测定鸡肉中癸氧喹酯残留量的测量不确定因素,并对各不确定度分量进行了量化计算,最终求得扩展不确定度为0.51礸/kg,分析表明重复测量、制备标准溶液及内标溶液引入的不确定度分量是影响癸氧喹酯残留量测量不确定度的主要因素。 相似文献
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《上海畜牧兽医通讯》2017,(4)
采用液相色谱-串联质谱法对家畜尿液中莱克多巴胺、克伦特罗、沙丁胺醇、特布他林、西马特罗和妥布特罗6种β-兴奋剂残留的不确定度进行评定,根据《测量不确定度的评定与表示》等相关技术规范要求,通过建立数学模型,对测量重复性、标准曲线、样品量取体积、定容体积、标准溶液、提取回收率等不确定因素进行了评定,对测量结果的各不确定度来源进行分析和量化。得出家畜尿液中莱克多巴胺、克伦特罗、沙丁胺醇、特布他林、西马特罗和妥布特罗6种β-兴奋剂残留的扩展不确定度分别为:0.107、0.062、0.154、0.218、0.063和0.244。 相似文献
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酶联免疫吸附分析法测定猪、鸡粪便中11种β2-受体激动剂残留 总被引：2，自引：1，他引：1
以市售β_2-受体激动剂酶联免疫检测试剂盒为基础,建立了可同时测定猪、鸡粪便中克仑特罗、溴布特罗、沙丁胺醇、特布他林、马布特罗、卡布特罗、马喷特罗、吡布特罗、西马特罗、西布特罗、克仑潘特11种β_2-受体激动剂的酶联免疫吸附(ELISA)分析法。该方法对猪、鸡粪便样品的检出限为5 ng/g,猪粪便样品的添加回收率为57.3%~247.4%,鸡粪便样品的添加回收率为89.3%~177.3%,猪粪便样品重复测定结果的相对标准偏差为0.3%~14.3%,鸡粪便样品重复测定结果的相对标准偏差为0.2%~23.5%。 相似文献
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建立检测饲料中16种β-受体激动剂的超高效液相色谱-串联质谱(UPLC/MS/MS)分析方法。样品经酸性甲醇提取,浓缩后用甲醇:0.1%甲酸(20:80)溶解进样,经超高效液相色谱-串联质谱在多反应检测(MRM)模式下测定。结果显示:16种β-受体激动剂基质添加标准曲线在50～1 000μg/kg质量浓度范围内线性良好。在50～1 000μg/kg添加水平下,16种β-受体激动剂的加标回收率在65%～105%,相对标准偏差(RSD)均小于10%(n=6);该方法对动物饲料16种β-受体激动剂的定量限为0.05 mg/kg(信噪比>10),检出限为0.01 mg/kg(信噪比>3)。 相似文献
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建立了液相色谱-电喷雾串联质谱同时测定乳与乳粉中11种甾类和9种β-受体激动剂类同化激素的快速确证方法.样品经体积分数0.1％甲酸乙腈溶液提取,正己烷脱脂,HLB固相萃取柱净化后,以0.1％甲酸甲醇-0.1％甲酸水为流动相梯度洗脱,通过C8色谱柱分离,电喷雾正离子多反应监测模式检测.在优化条件下,20种目标物在0.05～50 μg/L范围内线性良好,相关系数均大于0.996;方法定量限(RSN=10)在0.1～1.0 μg/kg之间;不同添加水平回收率为52.8％～97.4％,相对标准偏差(n=6)为2.8％～9.6％.多种市售纯牛奶和乳粉的测定结果表明,该方法操作简单、测定结果准确,可用于乳与乳粉中甾类和β-受体激动剂类激素多残留的快速测定. 相似文献
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《饲料工业》2019,(18):54-58
应用电感耦合等离子-质谱技术(ICP-MS),建立饲料中钠、镁、铬、锰、铁、铜、锌、砷、硒、镉和铅等元素的测定方法。对饲料样品的前处理方法、仪器工作参数和11种元素标准曲线进行优化;并以加标回收、分析方法比对和重复测试说明方法的准确性和精密性。方法在0～1 000 ng/ml范围内线性良好,仪器检出限为0.557 7～5.072 ng/ml,具有良好的精密度,其回收率在88.1%～104.4%之间,相对标准偏差小于5.0%。同时与原子吸收和原子荧光方法进行比对,测定结果相近。所建立的方法简单、快速,可替代原子吸收和原子荧光方法测定饲料中的11种金属元素,为饲料的质量控制提供理想的元素分析方法。 相似文献
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In experiment 1, 6 pregnant mares received a concentrate that contained a trace mineral premix that provided 14.3 mg Cu, 40 mg Zn, 28 mg Fe, 28 mg Mn, 0.08 mg Co, 0.16 mg I, and 0.16 mg Se/kg concentrate (group A). Seven mares received the same concentrate plus 502 mg Zn and 127 mg Cu once daily (group B). No differences (P > .05) in foal growth data, or Cu, Zn, and Fe concentrations of mare milk, mare serum, or foal serum were observed. In experiment 2, 6 pregnant mares received the same concentrate as group A (group C), and 8 mares received the same concentrate fortified with 4× the trace mineral premix (group D). Group C mares had higher serum Zn concentration at 1 day (P < 0.01) and 56 days (P < 0.04). Group C mares had higher milk Fe concentration at 28 days (P < .01), and group D mares had higher milk Cu concentration at 56 days (P < .01). Group C foals had higher serum Cu concentration at 14 days (P < .03). The results from this study provide no evidence to indicate that supplementing late gestating and lactating mares with higher dietary trace mineral levels than those recommended currently by NRC has any influence on foal growth and development, or on the Cu, Zn, and Fe concentrations of the mare milk, mare serum, or foal serum. 相似文献
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Breed differences for weight (CW), height (CH), and condition score (CS) were estimated from records (n = 12,188) of 2- to 6-yr-old cows (n = 744) from Cycle IV of the U.S. Meat Animal Research Center's Germplasm Evaluation (GPE) Program. Cows were produced from mating Angus and Hereford dams to Angus, Hereford, Charolais, Shorthorn, Galloway, Longhorn, Nellore, Piedmontese, and Salers sires. Samples of Angus and Hereford sires were 1) reference sires born from 1962 through 1970 and 2) 1980s sires born in 1980 through 1987. The mixed model included cow age, season of measurement and their interactions, year of birth, pregnancy-lactation code (PL), and breedgroup as fixed effects for CW and CS. Analyses of weight adjusted for condition score included CS as a linear covariate. The model for CH excluded PL. Random effects were additive genetic and permanent environmental effects associated with the cow. Differences among breed groups were significant (P < 0.05) for all traits and were maintained through maturity with few interchanges in ranking. The order of F1 cows for weight was as follows: Charolais (506 to 635 kg for different ages), Shorthorn and Salers, reciprocal Hereford-Angus (HA) with 1980s sires, Nellore, HA with reference sires, Galloway, Piedmontese, and Longhorn (412 to 525 kg for different ages). Order for height was as follows: Nellore (136 to 140 cm), Charolais, Shorthorn, Salers, HA with 1980s sires, Piedmontese, Longhorn, Galloway and HA with reference sires (126 to 128 cm). Hereford and Angus cows with reference sires were generally lighter than those with 1980s sires. In general, breed differences for height followed those for weight except that F1 Nellore cows were tallest, which may in part be due to Bos taurus-Bos indicus heterosis for size. 相似文献
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Nadine Pa?lack Barbara Mainzer Monika Lahrssen-Wiederholt Helmut Schafft Richard Palavinskas Angele Breithaupt Jürgen Zentek 《Journal of veterinary science (Suw?n-si, Korea)》2015,16(1):57-66
This study was conducted to measure the concentrations of strontium (Sr), barium (Ba), cadmium (Cd), copper (Cu), zinc (Zn), manganese (Mn), chromium (Cr), antimony (Sb), selenium (Se), and lead (Pb) in canine liver, renal cortex, and renal medulla, and the association of these concentrations with age, gender, and occurrence of chronic kidney disease (CKD). Tissues from 50 dogs were analyzed using inductively coupled plasma mass spectrometry. Cu, Zn, and Mn levels were highest in the liver followed by the renal cortex and renal medulla. The highest Sr, Cd, and Se concentrations were measured in the renal cortex while lower levels were found in the renal medulla and liver. Female dogs had higher tissue concentrations of Sr (liver and renal medulla), Cd (liver), Zn (liver and renal cortex), Cr (liver, renal cortex, and renal medulla), and Pb (liver) than male animals. Except for Mn and Sb, age-dependent variations were observed for all element concentrations in the canine tissues. Hepatic Cd and Cr concentrations were higher in dogs with CKD. In conclusion, the present results provide new knowledge about the storage of specific elements in canine liver and kidneys, and can be considered important reference data for diagnostic methods and further investigations. 相似文献
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枇杷是原产于中国的亚热带果树,是一种药食同源的保健水果,其栽培历史悠久。我国幅员辽阔,生态环境多样,孕育了世界上最多的枇杷种质资源。本文综述了我国枇杷属植物种质资源的收集与保存、种质交流、种质创新与利用的研究现状、问题分析;对未来发展提出意见,要努力创制“种源惟一,节肥、节水,省工、省力、省药”的“一源两节三省”品种与配套栽培技术,精准保护知识产权。对种源的知识产权保护要织密物防、技防的网络,诉案须有保护对象唯一的技术身份数据佐证,独具排他性。综述,本研究为枇杷种质资源的发展创制和产业发展提供决策参考。 相似文献