石墨炉原子吸收光谱法测定禽、畜肝组织中镉

Detection of Cadmium in liver tissues of poultry and livestock by graphite furnace atomic absorption spectrometry

目的建立禽、畜肝组织中镉（cd）的石墨炉原子吸收光谱分析的方法。方法采用混合酸体系消解样品，以NHM2PO。＋Mg（N03）：作基体改进剂，石墨炉原子吸收光谱法定量。结果本方法在0-5.0μg/L浓度范围内，相关系数r=0．9994，方法的相对标准偏差（RSD％）为2．9—6．8，对国家标准物质：猪肝（GBW08551）、大米粉（GBW10010），杨树叶（GBW08513）中cd的测定值均在标准值范围。结论本方法具有方法简便、灵敏度高、稳定性好的特点，适用于禽、畜肝组织中Cd含量的测定。

Objective To establish a method for detection detection of cadmium in liver tissues of poultry and livestock. Methods The samples were digested by mixed acids system, NH4H2PO4＋Mg （NO3）2 as matrix modifier, and quantitative analyzed by graphite furnace atomic absorption spectrometry. Results In the concentration ranges of 0- 5.0μg/L, the correlation coefficient was 0.9994, relative standard deviation （RSD%） was 2.9-6.8. The content of cadmium in pig liver tissue, rice and willow tree leaf were in normal range . conclusions The method is simple, sensitive and stable, suitable for detecting cadmium liver tissues of poultry and livestock.