试验旨在建立一种同时检测鸡蛋中5种青霉素类药物残留的高效液相色谱紫外检测法。鸡蛋经乙腈提取、正己烷脱脂、旋转蒸发浓缩和衍生化后,采用高效液相色谱法分离检测。结果显示,氨苄西林(ampicillin,AMP)、氯唑西林(cloxacillin,CLO)、...试验旨在建立一种同时检测鸡蛋中5种青霉素类药物残留的高效液相色谱紫外检测法。鸡蛋经乙腈提取、正己烷脱脂、旋转蒸发浓缩和衍生化后,采用高效液相色谱法分离检测。结果显示,氨苄西林(ampicillin,AMP)、氯唑西林(cloxacillin,CLO)、苯唑西林(oxacillin,OXA)、阿莫西林(amoxicillin,AMO)及普鲁卡因青霉素(penicillins G procaine,PRO)在10~1 000μg/kg呈良好线性关系,R^2>0.999;检测限为1.5μg/kg(S/N=3),定量限为5.0μg/kg(S/N=10),添加平均回收率为62.04%~93.13%,相对标准偏差为3.91%~13.69%,批内相对标准偏差为3.98%~14.71%,批间相对标准偏差为4.26%~12.71%。表明本试验建立的高效液相色谱紫外法重复性和灵敏度较高,适用于鸡蛋中的5种青霉素类药物残留检测。展开更多
A novel analytical method was developed for determining morpholinium cations lacking ultraviolet absorption groups.This determination was carried out by high performance liquid chromatographyindirect ultraviolet（HPLC...A novel analytical method was developed for determining morpholinium cations lacking ultraviolet absorption groups.This determination was carried out by high performance liquid chromatographyindirect ultraviolet（HPLC-1UV） detection using imidazolium ionic liquid as background absorption reagents,and imidazolium ionic liquid aq.soln.-organic solvent as mobile phase by a reversed-phase C18 column.The background ultraviolet absorption reagents,imidazolium ionic liquids and organic solvents were investigated.The imidazolium ionic liquid in the mobile phase is not only the background ultraviolet absorption reagent for IUV,but also an active component to improve the separation of morpholinium cations.It was found that morpholinium cations could be adequately determined when0.5 mmol/L 1-ethyl-3-methylimidazolium tetrafluoroborate aq.soln./methanol（80：20,v/v） was used as mobile phase with an IUV detection wavelength of 210 nm.In this study,the baseline separation of Nmethyl,ethylmorpholinium cations（MEMo） and N-methyl.propylmorpholinium cations（MPMo） was successfully achieved in 8.5 min.The detection limits（S/N = 3） for MEMo and MPMo were 0.15 and0.29 mg/L,respectively.This simple and practical method has been successfully applied to the determination of two morpholinium ionic liquids synthesized by the chemistry laboratory.展开更多
文摘试验旨在建立一种同时检测鸡蛋中5种青霉素类药物残留的高效液相色谱紫外检测法。鸡蛋经乙腈提取、正己烷脱脂、旋转蒸发浓缩和衍生化后,采用高效液相色谱法分离检测。结果显示,氨苄西林(ampicillin,AMP)、氯唑西林(cloxacillin,CLO)、苯唑西林(oxacillin,OXA)、阿莫西林(amoxicillin,AMO)及普鲁卡因青霉素(penicillins G procaine,PRO)在10~1 000μg/kg呈良好线性关系,R^2>0.999;检测限为1.5μg/kg(S/N=3),定量限为5.0μg/kg(S/N=10),添加平均回收率为62.04%~93.13%,相对标准偏差为3.91%~13.69%,批内相对标准偏差为3.98%~14.71%,批间相对标准偏差为4.26%~12.71%。表明本试验建立的高效液相色谱紫外法重复性和灵敏度较高,适用于鸡蛋中的5种青霉素类药物残留检测。
基金supported by the Natural Science Foundation of Heilongjiang Province(No.B201307)the Ministry of Education of Heilongjiang Province(No.12531192)the Program for Scientific and Technological Innovation Team Construction in Universities of Heilongjiang Province(No.2011TD010)
文摘A novel analytical method was developed for determining morpholinium cations lacking ultraviolet absorption groups.This determination was carried out by high performance liquid chromatographyindirect ultraviolet（HPLC-1UV） detection using imidazolium ionic liquid as background absorption reagents,and imidazolium ionic liquid aq.soln.-organic solvent as mobile phase by a reversed-phase C18 column.The background ultraviolet absorption reagents,imidazolium ionic liquids and organic solvents were investigated.The imidazolium ionic liquid in the mobile phase is not only the background ultraviolet absorption reagent for IUV,but also an active component to improve the separation of morpholinium cations.It was found that morpholinium cations could be adequately determined when0.5 mmol/L 1-ethyl-3-methylimidazolium tetrafluoroborate aq.soln./methanol（80：20,v/v） was used as mobile phase with an IUV detection wavelength of 210 nm.In this study,the baseline separation of Nmethyl,ethylmorpholinium cations（MEMo） and N-methyl.propylmorpholinium cations（MPMo） was successfully achieved in 8.5 min.The detection limits（S/N = 3） for MEMo and MPMo were 0.15 and0.29 mg/L,respectively.This simple and practical method has been successfully applied to the determination of two morpholinium ionic liquids synthesized by the chemistry laboratory.
