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1.
本研究建立了一种针对貉子肉中氯霉素、氟甲砜霉素的超高效液相色谱串联质谱的检测方法。以氘代氯霉素(D5-CAP)为内标,样品经乙腈提取,乙腈饱和正己烷除脂,固相萃取柱净化后,采用多反应监测(MRM)负离子模式,对貉子肉中氯霉素、氟甲砜霉素的残留量进行定量检测。结果表明,2种药物在0.1～5.0μg/mL范围内均呈现良好线性关系,相关系数r均大于0.999。样品中氯霉素和氟甲砜霉素的检测限为0.1μg/kg,定量限为0.3μg/kg,本方法在0.5～2.0μg/kg添加范围内药物回收率为68%～115%,其相对偏差均小于10%。 相似文献
2.
[目的]研究羊奶粉中氯霉素、甲砜霉素、氟甲砜霉素残留的液相色谱-串联质谱测定方法。[方法]样品经乙腈提取,固相萃取柱净化,以甲醇水作为流动相,采用多反应监测负离子模式进行定性及内标法定量分析。[结果]氯霉素、甲砜霉素、氟甲砜霉素的相关系数均大于0.999,氯霉素检出限为0.1μg/kg,甲砜霉素和氟甲砜霉素检出限为0.2μg/kg;氯霉素加标回收率为100.9%～116.2%,甲砜霉素加标回收率为88.4%～99.6%,氟甲砜霉素加标回收率为89.6%～103.2%。[结论]该方法灵敏度高、准确性好,适于测定羊奶粉中氯霉素、甲砜霉素,氟甲砜霉素的残留量。 相似文献
3.
本研究以鸡蛋、鸭蛋、鹅蛋为样本基质,建立一种加速溶剂萃取法结合超高效液相色谱-荧光法(UPLC-FLD)测定禽蛋中甲砜霉素残留。样品通过液-液萃取或加速溶剂萃取方法进行提取,乙腈饱和的正己烷去脂,复溶后利用液相色谱柱进行等度洗脱分离,而后采用荧光检测器进行定量。结果显示:甲砜霉素在空白禽蛋样品中的添加浓度在检测限(Limit of Detection,LOD)-250.0μg/kg范围内,相关系数均大于0.999 5,回收率为82.9%～95.3%,相对标准偏差均低于4.0%。检测限为3.3～3.4μg/kg,定量限为9.7～9.9μg/kg。综上,液-液萃取和加速溶剂萃取法均能很好地提取禽蛋样品中甲砜霉素,同时该检测方法高效、快速,适用于检测禽蛋中甲砜霉素残留。 相似文献
4.
建立了用高效液相色谱荧光检测法检测鸡蛋中甲砜霉素残留量的方法。样品经碱性乙酸乙酯提取,饱和正己烷脱脂,氮吹仪吹干浓缩后,以乙腈-磷酸二氢钠溶液（0.01mol/L,含0.005mol/L L十二烷基硫酸钠和0.1%三乙胺）（35∶65）为流动相,流速为1.0mL/min,荧光检测激发波长为224nm,发射波长为290nm。甲砜霉素在0.025～5.0mg/L质量浓度范围内,本方法线性关系良好,相关系数为0.999 7。当甲砜霉素添加水平为15～500μg/kg时,该方法平均回收率为86.35%～93.76%,相对标准偏差为4.21%～7.89%,日内相对标准偏差为4.84%～6.62%;日间相对标准偏差为8.92%～10.83%。甲砜霉素最低检测限为1.5μg/kg（S/N=3）,最低定量限5μg/kg（S/N=10）。所建立的方法简便、快速、灵敏度高,适用于鸡蛋中甲砜霉素残留的高灵敏度检测。 相似文献
5.
建立了动物源食品中氯霉素、甲砜霉素、氟苯尼考及氟苯尼考胺残留检测的超高效液相色谱-串联质谱(UPLC-MS/MS)分析方法.样品在碱性条件下用乙酸乙酯提取后,再用正己烷去除脂肪,浓缩后用BEH C18(50 mm×2.1 mm,1.7 μm)色谱柱分离,以乙腈和水为流动相进行梯度洗脱,流速为0.3 mL/min,多反应监测(MRM)模式检测.结果表明:四种药物在2～500 μg/L的系列浓度范围内均呈良好线性关系,相关系数r均大于0.990.样品中氯霉素的检测限为0.1 μg/kg,定量限为0.2 μg/kg;甲砜霉素、氟苯尼考和氟苯尼考胺的检测限为0.5 μg/kg,定量限为1 μg/kg.本方法氯霉素在0.2～1 μg/kg的添加浓度范围内,甲砜霉素、氟苯尼考及氟苯尼考胺在1～50 μg/kg的添加浓度范围内平均回收率均为70%～120%,相对标准偏差(RSD)均小于20%.该方法具有简便快捷、灵敏度高、定性准确等特点. 相似文献
6.
建立了动物源食品中氯霉素、甲砜霉素、氟苯尼考及氟苯尼考胺残留检测的超高效液相色谱-串联质谱（UPLC—MS／MS）分析方法。样品在碱性条件下用乙酸乙酯提取后,再用正己烷去除脂肪,浓缩后用BEH C18（50mm×2．1mm,1．7μm）色谱柱分离,以乙腈和水为流动相进行梯度洗脱,流速为0．3mL／min,多反应监测（MRM）模式检测。结果表明：四种药物在2—500μg／L的系列浓度范围内均呈良好线性关系,相关系数r均大于0．990。样品中氯霉素的检测限为0．1μg／kg,定量限为0．2μg/kg;甲砜霉素、氟苯尼考和氟苯尼考胺的检测限为0．5μg/kg,定量限为1μg／kg。本方法氯霉素在0．2～1μg／kg的添加浓度范围内,甲砜霉素、氟苯尼考及氟苯尼考胺在1—50μg／kg的添加浓度范围内平均回收率均为70％-120％,相对标准偏差（RSD）均小于20％。该方法具有简便快捷、灵敏度高、定性准确等特点。 相似文献
7.
为了检测畜禽产品中酰胺醇类药物残留是否超标,采用超高效液相色谱-串联质谱法建立了同时检测鸡蛋、鸡肉和猪肉中氯霉素、甲砜霉素、氟苯尼考及其代谢产物氟苯尼考胺等酰胺醇类药物的分析方法。样品经乙腈∶氨水(98∶2,V/V)和乙酸乙酯提取、氮吹、CNWBOND Si柱净化、正己烷去脂后,经ACQUITY UPLC CSH C18 (100 mm×2.1 mm,1.7μm)柱分离,以2 mmol/L乙酸铵水溶液和2 mmol/L乙酸铵乙腈溶液为流动相进行梯度洗脱,流速为0.3 mL/min,多反应监测模式(MRM)检测,分别以氯霉素-d5为氯霉素、甲砜霉素内标,以氟苯尼考-d3为氟苯尼考、氟苯尼考胺内标进行内标法定量。结果显示:4种药物在0.2～100 ng/mL范围内均成良好线性关系,相关系数均在0.99以上,方法检测限为0.1μg/kg,定量限为0.5μg/kg,在0.5～2.0μg/kg添加范围内,回收率范围为70.6%～112.3%,批内相对标准偏差为1.5%～12.7%,批间相对标准偏差为3.2%～14.5%。结果表明该方法灵敏度高,稳定性好,能满足同时检测畜禽产品中多种酰胺醇类药物残留的分析要求。 相似文献
8.
试验将鸡肉样品制成匀浆,用乙酸乙酯提取,正己烷去脂后用乙酸乙酯反萃取,经固相萃取柱(SPE)净化,甲醇洗脱,采用HPLC进行检测。甲砜霉素和氟甲砜霉素在同时检测时的保留时间分别为7.30min和17.60min,测得甲砜霉素与氟甲砜霉素的检测限达10ng/g。在添加浓度为0.005～0.02mg/kg时,平均回收率在65.84%～81.18%之间,相对标准偏差(RSD)在5.6%～13.2%之间(n=5);甲砜霉素、氟甲砜霉素在0.01～1.0mg/L范围内有良好的线性关系。 相似文献
9.
建立一种检测黄鳝肌肉中氯霉素、甲砜霉素和氟苯尼考残留的超高效液相色谱-串联质谱(UPLC-MS/MS)方法。黄鳝肌肉样品中加入无水硫酸钠和氯化钠,20 m L碱性乙酸乙酯提取2次。合并提取液,于45℃水浴中氮吹至干。5%甲醇溶液复溶,再加正己烷(5%甲醇溶液饱和)除脂。弃去上层正己烷,下层水相过0.22μm滤膜,进样检测。氯霉素、甲砜霉素和氟苯尼考在0.5~50μg·L~(-1)添加水平内线性良好,检测限为0.1μg·kg~(-1),定量限为0.3μg·kg~(-1)。氯霉素在0.3、0.45和0.6μg·kg~(-1)添加水平回收率为92.83%~111.26%;甲砜霉素在25、50和75μg·kg~(-1)添加水平回收率为86.76%~107.30%;氟苯尼考在50、100和150μg·kg~(-1)添加水平回收率为96.21%~104.14%。本方法对3种药物的平均提取回收率在86.76%~111.26%范围内,日内精密度为2.16%~13.66%,日间精密度为1.42%~8.06%。本研究建立的方法精密度高,重现性好,在保证回收率的基础上有效地提高了检测效率。 相似文献
10.
为研究甲砜霉素在鸡肌肉中的残留消除规律,鸡肌肉样品经丙酮、二氯甲烷提取,饱和正己烷脱脂,氮吹仪吹干浓缩后用流动相溶解,上高效液相色谱荧光检测器检测。测定鸡肌肉样品中甲砜霉素的检测限为1.5μg.kg-1(S/N=3)、定量限为5μg.kg-1(S/N=10)。各试验组鸡分别按体质量以10.0、20.0和50.0mg.(kg.d)-1剂量给药,每天1次,连续5d内服给药后,鸡肉中甲砜霉素残留量随给药剂量增大呈上升趋势,随休药期的延长而降低。休药第1天时,鸡肉中甲砜霉素残留量均达到峰值。休药前期甲砜霉素残留消除较快,后期消除缓慢。休药第5天时,鸡肉中甲砜霉素残留量均低于50μg.kg-1,休药第9天时,鸡肌肉中甲砜霉素残留量均低于检测限(1.5μg.kg-1);甲砜霉素在鸡肌肉中的残留量与给药剂量呈正相关。 相似文献
11.
In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario. Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously. 相似文献
13.
In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%). Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada. 相似文献
14.
In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%). 相似文献
15.
In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection. 相似文献
17.
In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated. Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively. 相似文献
18.
In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%). 相似文献
19.
In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%). Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada. 相似文献
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