The consumption of seafood is widespread in China.The increase in the rate of seafood allergies,as well as their persistence and severity,become an important food safety issue.To improve seafood allergy patients’ lif...The consumption of seafood is widespread in China.The increase in the rate of seafood allergies,as well as their persistence and severity,become an important food safety issue.To improve seafood allergy patients’ life quality,it is important to find a kind of seafood which has little or even none allergens.Different kinds of seafood live in different circumstances,it may have different allergens.This study compared the difference among varieties of shrimp.In the experiments,three kinds of shrimp were selected and the protein profiles were analyzed using SDS-PAGE.Then Immunoblotting and EAST inhibition were used to determine the allergenicity of them.The results show that main allergens of the three kinds of shrimp have molecules-36 kD,similar allergenicity,and critical cross-reactivity.展开更多
建立了虾中14种磺胺类药物残留量的柱后衍生高效液相色谱检测方法。样品在加入内标物磺胺吡啶后用乙酸乙酯提取，提取液浓缩后用4 mL 乙酸乙酯溶解残余物，用盐酸溶液反萃取，正己烷去脂，盐酸溶液经滤膜过滤后，加入乙腈、甲醇和3.5 mo...建立了虾中14种磺胺类药物残留量的柱后衍生高效液相色谱检测方法。样品在加入内标物磺胺吡啶后用乙酸乙酯提取，提取液浓缩后用4 mL 乙酸乙酯溶解残余物，用盐酸溶液反萃取，正己烷去脂，盐酸溶液经滤膜过滤后，加入乙腈、甲醇和3.5 mol / L 乙酸钠溶液（体积比为5：5：20）的混合溶液混匀后，经高效液相色谱分离，用荧光胺衍生试剂进行柱后衍生，荧光检测器检测。采用基质标样添加法绘制标准曲线，内标法定量。对柱后衍生系统参数进行了优化，确定了荧光胺溶液的浓度、流速和反应温度分别为0.2 g / L、0.15 mL / min 和50℃。14种磺胺类药物在5～200μg / L 范围内具有良好的线性。磺胺类药物的定量限（LOQ，S / N =10）为1.0～5.0μg / kg。在1.0～100.0μg / kg 添加水平内，磺胺类药物的平均回收率为77.8％～103.6％，相对标准偏差（ RSD）为2.9％～9.1％（ n =6）。实验结果表明该方法灵敏、准确，重复性好，适用于虾中磺胺类药物的残留检测。展开更多
文摘The consumption of seafood is widespread in China.The increase in the rate of seafood allergies,as well as their persistence and severity,become an important food safety issue.To improve seafood allergy patients’ life quality,it is important to find a kind of seafood which has little or even none allergens.Different kinds of seafood live in different circumstances,it may have different allergens.This study compared the difference among varieties of shrimp.In the experiments,three kinds of shrimp were selected and the protein profiles were analyzed using SDS-PAGE.Then Immunoblotting and EAST inhibition were used to determine the allergenicity of them.The results show that main allergens of the three kinds of shrimp have molecules-36 kD,similar allergenicity,and critical cross-reactivity.
文摘建立了虾中14种磺胺类药物残留量的柱后衍生高效液相色谱检测方法。样品在加入内标物磺胺吡啶后用乙酸乙酯提取，提取液浓缩后用4 mL 乙酸乙酯溶解残余物，用盐酸溶液反萃取，正己烷去脂，盐酸溶液经滤膜过滤后，加入乙腈、甲醇和3.5 mol / L 乙酸钠溶液（体积比为5：5：20）的混合溶液混匀后，经高效液相色谱分离，用荧光胺衍生试剂进行柱后衍生，荧光检测器检测。采用基质标样添加法绘制标准曲线，内标法定量。对柱后衍生系统参数进行了优化，确定了荧光胺溶液的浓度、流速和反应温度分别为0.2 g / L、0.15 mL / min 和50℃。14种磺胺类药物在5～200μg / L 范围内具有良好的线性。磺胺类药物的定量限（LOQ，S / N =10）为1.0～5.0μg / kg。在1.0～100.0μg / kg 添加水平内，磺胺类药物的平均回收率为77.8％～103.6％，相对标准偏差（ RSD）为2.9％～9.1％（ n =6）。实验结果表明该方法灵敏、准确，重复性好，适用于虾中磺胺类药物的残留检测。
