自动电位滴定法测定保健食品中钙检出限的确定

Determination of detection limit of calcium in health care products by automatic potentiometric titration

目的对自动电位滴定法测定保健食品中钙的检出限进行确定。方法用自动电位滴定仪测定含钙保健食品中的钙含量,通过5种不同的方法计算检出限。结果自动电位滴定法测定保健食品中钙检出限的计算采用空白标准偏差法,得到检出限为0.002 g/100 g或0.002 g/100 mL。结论空白标准偏差法确定本方法的检出限较合理,可信度相对较高。

Objective To determine the detection limit of calcium in health care products by automatic potentiometric titration.Methods The content of protein in health care products was determined by automatic potentiometric titration.The detection limit was calculated by 5 different methods.Results The blank standard deviation method was used to calculate the detection limit of calcium in health food by automatic potentiometric titration.The detection limit was 0.002 g/100 g or 0.002 g/100 mL.Conclusion The blank standard deviation method is more reasonable to determine the detection limit of this method and it has higher reliability.