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Abstract:
采用高效液相色谱-紫外检测法测定了对羟基苯丙酮酸烯醇一酮式互变异构动力学.结果表明,在以甲醇与13mmol/LNaH2PO4-Na2HPO4缓冲液(pH为5.91)(体积比为10:90)为流动相,流速O.8mL/min时,对羟基苯丙酮酸烯醇式和酮式在10min内得以完全分离.根据酮式结构的含量测定工作曲线的线性范围为1.0×10^-5~1.0×10^-3mol/L,相关系数R2=0.9988,峰高和保留时间的相对标准偏差为3.4%和0.6%.对羟基苯丙酮酸互变异构符合一级反应动力学,测得其在20℃下的速率常数为k=0.005min^-1,半衰期为t1/2=138.6min.
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福建师范大学学报:自然科学版
ISSN: 1000-5277
Year: 2009
Issue: 3
Page: 77-79
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ESI Highly Cited Papers on the List: 0 Unfold All
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Chinese Cited Count: -1
30 Days PV: 0
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