研究用抑制型高效离子色谱法测定苯甲酸含量的方法。色谱柱为Dionex Ion Pac AS11阴离子交换柱(250mm×4mm)和AG11保护柱(50mm×4mm),流动相由0.22mol/L氢氧化钠、水和50%异丙醇组成,梯度淋洗,抑制电导检测。样品经亚铁氰化钾...研究用抑制型高效离子色谱法测定苯甲酸含量的方法。色谱柱为Dionex Ion Pac AS11阴离子交换柱(250mm×4mm)和AG11保护柱(50mm×4mm),流动相由0.22mol/L氢氧化钠、水和50%异丙醇组成,梯度淋洗,抑制电导检测。样品经亚铁氰化钾和乙酸锌溶液沉淀后,再依次经滤纸和微孔滤膜过滤,滤液进行高效离子色谱分析。该法测定苯甲酸的线性范围为5～500mg/L,检测限为1.5mg/L,线性方程的相关系数为0.9997,对100mg/L的苯甲酸溶液10次平行测定的RSD为1.98%。该法应用于辣椒红色素中苯甲酸的测定,取得满意结果,加标回收率在97.6%～100.3%之间。展开更多
A new reduced Schiff base product H2Ani-D,L-Ala was prepared from anisaldehyde(Ani) and D,L-Alanine(D,L-Ala)through reactions of consendation,reduction,acidification.The products were characterized by melting point ap...A new reduced Schiff base product H2Ani-D,L-Ala was prepared from anisaldehyde(Ani) and D,L-Alanine(D,L-Ala)through reactions of consendation,reduction,acidification.The products were characterized by melting point apparatus,infrared spectra and element analysis.展开更多
文摘研究用抑制型高效离子色谱法测定苯甲酸含量的方法。色谱柱为Dionex Ion Pac AS11阴离子交换柱(250mm×4mm)和AG11保护柱(50mm×4mm),流动相由0.22mol/L氢氧化钠、水和50%异丙醇组成,梯度淋洗,抑制电导检测。样品经亚铁氰化钾和乙酸锌溶液沉淀后,再依次经滤纸和微孔滤膜过滤,滤液进行高效离子色谱分析。该法测定苯甲酸的线性范围为5～500mg/L,检测限为1.5mg/L,线性方程的相关系数为0.9997,对100mg/L的苯甲酸溶液10次平行测定的RSD为1.98%。该法应用于辣椒红色素中苯甲酸的测定,取得满意结果,加标回收率在97.6%～100.3%之间。
文摘A new reduced Schiff base product H2Ani-D,L-Ala was prepared from anisaldehyde(Ani) and D,L-Alanine(D,L-Ala)through reactions of consendation,reduction,acidification.The products were characterized by melting point apparatus,infrared spectra and element analysis.
