建立一种同步荧光法与双波长法结合起来同时测定血浆中肾上腺素(E)、去甲肾上腺素(NE)和多巴胺(DA)3种儿茶酚胺类神经递质的方法.对E,NE和DA 3种神经递质的衍生物分别进行同步荧光扫描,考察影响体系荧光强度的因素.△λ=70 nm时获得的同步荧光光谱图中,DA在385.0 nm处的荧光信号不受干扰,而且E和NE的相互干扰可通过双波长法消除.最佳实验条件:0.5 mol/L乙酸一乙酸钠为缓冲液(pH=6.5),E,NE和DA的加热时间分别为1,3和35 min.E,NE和DA线性范围分别为0～320,0～640μg/L和0～160μg/L,相关系数分别为0.999 5,0.999 8和0.999 3;最低检测限分别为0.20,0.97μg/L和0.73μg/L;血浆样品经酸性正丁醇和正庚烷进行处理.该法用于血浆中儿茶酚胺类神经递质的测定,结果令人满意.
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