摘要
建立一种基于稀酸提取技术实现粮食中铅镉同时测定的电化学快速检测方法。通过优化提取液的种类和底物液的成分,提高方法准确性和灵敏度,实现粮食中铅和镉同时检测,并且通过科学系统的评价方案对所建立的检测方法进行性能考察,提高检测方法的稳定性。该方法镉的检出限为0.005 mg/kg,定量限为0.012 mg/kg,铅的检出限0.002 mg/kg,定量限为0.004 mg/kg,回收率范围98%~120%,相对标准偏差均小于15%,可在15 min内完成2种元素的同时检测,检测效率高。
An electrochemical detection method for the simultaneous rapid determination of lead(Pb)and cadmium(Cd)in grain based on dilute acid extraction was established.The extraction solution and the composition of substrate solution were optimized to improve the accuracy and sensitivity of the detection for Pb and Cd simultaneously.Furthermore,the performance of the established method was investigated through a scientific and systematic evaluation scheme to improve the stability.The results indicated the limit of detection(LOD)of Cd was 0.005 mg/kg,the limit of quantitative(LOQ)was 0.012 mg/kg,the LOD of Pb was 0.002 mg/kg,LOQ was 0.004 mg/kg,the detection recovery range was 98%~120%,and the relative standard deviation(RSD)was less than 15%.The method could quantify the concertation of Cd and Pb in samples quickly and accurately within 15 minutes.
作者
田巍
袁华山
白福军
王平东
赵皖
肖理文
叶金
王松雪
Tian Wei;Yuan Huashan;Bai Fujun;Wang Pingdong;Zhao Wan;Xiao Liwen;Ye Jin;Wang Songxue(Academy of National Food and Strategic Reserves Administration,Beijing 100037;Nanjing Sinograin Quality Control Center of Grain and Oil Co.,Ltd.,Nanjing 211155;Chengde Sinograin Quality Control Center of Grain and Oil Co.,Ltd.,Chengde 067000;Nanjing Microdetection Bio-Tech Co.,Ltd.,Nanjing 210061;Shanghai Femdetection Bio-Tech Co.,Ltd.,Shanghai 201400)
出处
《中国粮油学报》
CSCD
北大核心
2023年第8期244-249,共6页
Journal of the Chinese Cereals and Oils Association
基金
国家重点研发计划项目(2017YFC1601304)。
关键词
铅
镉
电化学快速检测
粮食
lead
cadmium
electrochemical rapid detection
grain
作者简介
第一作者:田巍,女,1992年出生,助理研究员,粮油质量安全分析与检测,tw@ags.ac.cn;通信作者:王松雪,男,1977年出生,研究员,粮油质量安全分析与检测,wsx@ags.ac.cn。
