脑脊液蛋白定量α,α‘—联吡啶测定法

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脑脊液(CSF)蛋白定量常用浊度法,仅缩脲试剂比色法[1]和考马斯蓝(CBG)染料结合法[2]等。我们参考有关文献[3,4]用α,α′-联吡啶作CSF蛋白定量测定,方法简便,精密度高,重复性好。1材料和方法1.1原理在酸性溶液中,蛋白质还原Fe为Fe,后者与α,α′-联吡啶结合生成红色复合物,颜色深浅与蛋白含量成正比.1.2试剂1.2.1pH4.00.25mol/L醋酸盐缓冲液。1.224.0g/LFeCl3溶液。1.2.3显色剂α,α′-联吡啶200mg,溶于5ml无水乙醇,加醋酸盐缓冲液至200ml,
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