①测定过程中所有试剂和待测样本均需在冰上放置,以免变性和失活;
②比色皿中反应液的温度必须保持37℃或25℃,可以取烧杯装入一定量37℃或25℃的蒸馏水,将烧杯放入37℃或25℃恒温水浴中,在反应过程中将比色皿连同反应液放在此烧杯中;
③准确在0 s和120 s处完成读数,以保证实验结果的准确性;
④∆A测定应在0.01-0.25之间,若∆A测定大于0.25,需将样本进行稀释后再进行测定;
⑤提取液中含有一定浓度的蛋白(约1 mg/mL),测定样品蛋白浓度时需减去提取液的蛋白含量;
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