①测定过程中试剂二、试剂三和样本需冰上放置,以免失活,工作液37℃水浴中放置;
②反应过程中应保持37℃恒温,建议在烧杯中装入适量37℃蒸馏水,将此烧杯放入37℃恒温水浴中,在反应过程中把比色皿连同反应液放在此烧杯中;
③准确在20 s和140 s处完成读数,以保证实验结果的准确性;
④若∆A测定和A1测定>0.5建议使用提取液将样本稀释后再进行测定,使∆A测定和A1测定<0.5以提高检测的灵敏度;
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