关键词: 过氧化氢酶-2, 样品, 能力验证, 均匀性, 稳定性

Abstract: Objective To prepare and evaluate catalase-2 sample(a type, b type)with good stability and uniformity. Method Extracting 4% samples randomly to finish the uniformity test. Samples were also extracted in the freeze thawing stability test for at most 4 times. As for the time-temperature uniformity, we used time(day) and temperature(℃) as the coordinate value: 1, 2, 3, 7,15, 30 days were used as time coordinate, and 4, 20, 37℃ as temperature coordinate; and 2 bottles of each type samples were observed at every fixed point. Result A type and b type clearly performed a and b band on their own., and all of them were able to be stable after 4-time freeze thawing. And also the time-temperature stability test showed that standard samples of a type and b type could be present stable for 30 days at 4,20℃ and 37℃. Conclusion Catalase-2 samples behaved well in the uniformity and stability test, which were up for the requirements of proficiency testing.

Key words: Catalase-2, sample, proficiency testing, uniformity, stability