微波消解-石墨炉原子吸收光谱法测定榆林小杂粮中的镉含量

打开文本图片集

Determination of Cadmium in Yulin Minor Cereals by Microwave Digestion- Graphite Furnace Atomic Absorption Spectrometry

SHAO Huahua， JIA Li， GAO Wenrui， ZHAO Huiming （Yulin Food Inspection and Testing Center， Yulin 719ooo， China）

Abstract： In this paper， an analytical method for determining cadmium content in minor cereals by microwave digestion-graphite furnace atomic absorption spectroscopy was established.The results of method validation showed that the linear relationship between cadmium in the range of 0μgL-1 to 2.5μgL-1 was good， the correlation coefficient r=0.999 4 ，the relative standard deviation of the method precision was 1.7% to 3.1% ， the detection limit was （204号 0.00074mg⋅kg-1 ，and the recovery rate was 95.5% to 102.0% ，all of which met the requirements of trace detection. A total of30 kinds of minor cereals in5categories were tested，andthecadmium content in all samples was lower than the requirements of the GB 2762—2022 limit standard.

Keywords： cadmium; microwave digestion; graphite furnace atomic absorption spectrometry; minor cereals

榆林小杂粮不仅是当地农民收人的主要来源之一，也是助力乡村经济发展的龙头产业[1-2]。（剩余3651字）