中国食品学报2017，Vol.17Issue(1)：217-223,7.DOI:10.16429/j.1009-7848.2017.01.028
快速分离富集火焰原子吸收测定大米中的痕量镉
FI on-Line Adsorption and Preconcentration Coupled with FAAS for the Determination of Trace Cadmium in Rice
摘要
Abstract
A flow injection (FI) unequal flow rate complexing preconcentration system coupled to flame atomic absorption spectrometry (FAAS) was developed for the determination of trace cadmium in rice.During the preconcentration procedure,complexant and metal solutions were under different peristaltic pumps.Through decreasing the flow rate of the complexant,the flow rate of the metal-complex compound was decreased in the KR.The low flow rate benifiting the adsorption of the metal-complex compound on to the inner walls of the KR.With 60 s (sample throughput of 37/h) of sampling at a flow rate of 6.0 mL/min,an enrichment factor (EF) of 14.7 (higher than 9.0 achieved by conventional elution method) and a detection limit (3) of 0.68 μg/L were obtained.The precision (RSD,n=11) was 2.3％ at the 15 μg/L level.When 0.1‰ triethannolamine was used as masking reagent,the recovery rate was from 94.5％ to 97.8％.关键词
流动注射/火焰原子吸收光谱/镉/大米Key words
flow injection/flame atomic absorption spectrometry/cadmium/rice引用本文复制引用
张宏康,王中瑗,劳翠莹,李婉婷..快速分离富集火焰原子吸收测定大米中的痕量镉[J].中国食品学报,2017,17(1):217-223,7.基金项目
国家自然科学基金项目(41406093) （41406093）
广东省科技计划项目(2016A020210138)广东省教育厅科技创新项目(2013KJCX0103) （2016A020210138）
国家海洋局青年海洋科学基金项目(2013513) （2013513）
国家海洋局南海分局局长基金项目(1328) （1328）
