粮食、饲料中尿素酶活性测量结果不确定度的评定

EVALUATION OF THE UNCERTAINTY OF THE DETERMINATION OF UREASE ACTIVITY IN CEREAL AND FEEDSTUFF

对粮食、饲料中尿素酶活性测量结果的不确定度进行了评定。使用酸度计,利用pH增值法,以pH增量表示尿素酶活性。通过对影响样品测试过程的不确定度分量的分析和量化,求得尿素酶活性测量结果的标准不确定度和扩展不确定度分别为0.019、0.04,并对测量结果进行了表述。

The uncertainty of the determination of urease activity in cereal and feedstuff was evaluated. By using pH meter, urease activity was expressed by pH increment according to the measurement of pH increment. By analyzing and quantifying the uncertainty influencing the testing process of the samples, the standard uncertainty and the expanded uncertainty of the urease activity are 0.019, 0.04 respectively, the result of measurement was demonstrated.