Abstract
目的 建立以对乙酰基苯基磷酸盐(p-acetylphenylphosphace,PAP-PNa2)为底物的一种新的碱性磷酸酶(ALP)的测定方法.方法 在威图半自动生化分析仪上探讨试验条件,建立试验参数.结果 新方法测定产物对乙酰基酚(PAP)的吸收峰为325 nm,ALP的米氏常数(Km)=0.376mmol/L;340 nm PAP的摩尔消光系数为23 390 L·mol-1·cm-1,缓冲液浓度0.438 mol/L,最适pH值10.4,底物浓度5.0 mmol/L,延迟期60s,线性反应期15 min,线性范围为0~1 110 U/L;Hb<115.62 mg/L时对测定结果无影响;胆红素对测定结果无影响;本法总ALP的参考范围为男:63.1~118.3 U/L,女:52.5~89.0 U/L.结论 此方法重复性好,线性反应期长,干扰因素少,适于自动生化分析。
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