Determination of cadmium in rice bran oils by ICP-MS with rapid ultrasound-assisted acid leaching extraction
Determination of cadmium in rice bran oils by ICP-MS with rapid ultrasound-assisted acid leaching extraction
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ICP-MS 快速超声辅助酸浸萃取法测定米糠油中的镉
DOI：
10.1007/s00003-020-01275-0
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发表时间：
2020-03
影响因子：
2.4
通讯作者：
Hu Qiuhui
中科院分区：
文献类型：
--
作者：
Shao Zhiying;Xue Mei;Liu Qin;Li Peng;Fang Yong;Hu Qiuhui
米糠油是米糠加工的重要副产品，近年来在人们的日常饮食中越来越受欢迎。镉（Cd）是一种有毒元素，易在米糠中积累，因此研究米糠中Cd的赋存状况对公众健康具有重要意义。在这项研究中，超声辅助提取程序方法使用稀酸，然后电感耦合等离子体质谱法测定镉的RBOs。研究了超声波功率、酸性萃取剂、萃取剂/油比和超声时间对超声波辅助萃取镉的影响。在优化的萃取条件下，电感耦合等离子体质谱（ICP-MS）测定RBOs中Cd的检出限为0.08 ng g−1，精密度为5.1%，回收率为97-102%。该方法简单、快速、准确，已用于市售RBO的分析。调查显示，镉残留量非常低，因此食用RBO不会对镉暴露造成风险。
As an important byproduct of rice bran in the rice milling industry, rice bran oil (RBO) has become increasingly popular in daily diets in recent years. Cadmium (Cd) is a toxic element and easily accumulates in rice bran; thus, it is of great significance to investigate Cd occurrence in RBOs for the sake of public health. In this study, an ultrasound-assisted extraction procedure method using diluted acid followed by inductively coupled plasma mass spectrometry was developed for the determination of Cd in RBOs. Key parameters that affect the ultrasound-assisted extraction of Cd, namely, ultrasonic power, acid extractant, extractant/oil ratio and sonication time, were investigated in detail. Under the optimized extraction conditions with inductively coupled plasma mass spectrometry (ICP-MS) determination, a limit of detection of 0.08 ng g−1, a precision of 5.1%, and recoveries in the range of 97–102% were achieved for the determination of Cd in RBOs. The proposed method is simple, fast and accurate and was applied to analyze RBOs available on the market. The survey showed that the Cd residue was very low, so consumption of RBOs does not pose a risk regarding Cd exposure.
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