饼干中铝元素测定的能力验证结果分析

Analysis of Verification Results of the Ability to Determination of Aluminum in Biscuits

本文建立了含铝元素饼干的能力验证样品的制备方法,并按照单因子方差分析法(F检验)及t检验法对样品进行均匀性和稳定性检验,采用稳健统计方法算法A,以参加者结果的稳健平均值作为指定值,以稳健标准差作为能力评定标准差,以Z比分数作为评判依据。结果表明,该样品均匀性、稳定性良好,在本次能力验证活动中实验室满意率为97%,可疑率为0%,不满意率为3%,多数实验室均能准确检测饼干中铝元素的含量。

The preparation method of the proficiency testing samples of biscuits containing aluminum was established.The uniformity and stability of the samples were tested according to the one-way analysis of variance and t test. Based on algorithm A in robust statistical method, the robust average of the results reported by the participants were used as the specified value and the robust standard deviation were used as the standard deviation of ability evaluation, and the Z ratio score was used as the basis for the evaluation of the participating laboratories. The results showed that the sample had good uniformity and stability. In this proficiency testing activity, the laboratory satisfaction rate was 97%, the suspicious rate was 0%, and the dissatisfaction rate was 3%. Most laboratories could accurately detect the residue of aluminum in biscuits.