The detection limit of aluminum in baking powder in National Standard

Based on US EPA detection limit procedure,8 samples with 1-5 times of calculated detection limit were tested.Based on sample standard deviation and student t-distribution,national standard of Aluminum detecting limit was established and verified.Detecting threshold,sample detection limit,and sample quantitative limit were all tested.The method detection Limit is 0.93μg/mL,the reliable quantitative limit is 3.72μg/mL,the sample detection threshold is 93μg/g,the sample quantitative limit is 372μg/g.The sample testing data indicated the testing ability of Aluminum in baking powder.