石墨炉原子吸收法测定食品中铅的方法检出限

Detection and Quantitation Limit of Lead in Food by Graphite Furnace Atomic Absorption Spectrometry

采用石墨炉原子吸收法测定食品中铅的方法检出限和定量限。根据国标《GB 5009.12—2017食品安全国家标准食品中铅的测定》对检出限和定量限的测定和计算方法,在石墨炉原子吸收光谱仪上测定食品中铅的方法检出限和定量限。若取样量为0.5 g/0.5 mL,定容体积10 mL,则最小检出限质量浓度为0.0014 mg/kg,定量限为0.04 mg/kg。该方法线性和范围、检出浓度和最低定量浓度、回收率、精密度、重复性的试验结果均满足GB 5009.12—2017《食品安全国家标准食品中铅的测定》第一法。

To determine limit of detection(LOD)and limit of quantitation(LOQ)of lead in food by graphite furnace atomic absorption spectrometry.Based on the method of determining and calculating detection limit by GB 5009.12—2017,the LOD and LOQ of lead in food was determined.If the sampling amount was 0.5 g/0.5 mL and the volume was 10 mL,the minimum detection limit concentration was 0.0014 mg/kg and the quantitative limit was 0.04 mg/kg.The experimental results of linearity and range,detected concentration and minimum quantitative concentration,recovery rate,precision and reproducibility of this method all met the first method of GB 5009.12—2017.