CAJ | 학술논문

通过正交试验优选出了较满意的测定食用菌中铅的石墨炉原子吸收法检测条件，并采用该方法测定了34个食用菌样品中的Pb含量。结果表明：Pb含量测定的最适条件为磷酸二氢铵＋硝酸镁混合基体改进剂，加入量10μL，灰化温度600℃，原子化温度1900℃；铅的检出限为0．24ng／mL，回收率为95．5％～i00．3％；34个食用菌样品中97％的食用菌铅含量小于2．0mg／kg。
통과정교시험우선출료교만의적측정식용균중연적석묵로원자흡수법검측조건，병채용해방법측정료34개식용균양품중적Pb함량。결과표명：Pb함량측정적최괄조건위린산이경안＋초산미혼합기체개진제，가입량10μL，회화온도600℃，원자화온도1900℃；연적검출한위0．24ng／mL，회수솔위95．5％～i00．3％；34개식용균양품중97％적식용균연함량소우2．0mg／kg。
According to orthogonal test in this paper, an analytical method for determining lead in edible fun- gi by graphite furnace atomic absorption spectrometry is developed and 34 edible fungi samples are tested. The results show that：（1）the proper conditions for determining lead are ashing temperature 600℃ and atomizing temperature 1 900℃ with 10μl NH4H2PO4 ＋Mg（NO3）2 as a matrix modifier;（2）the recoveries of lead are from 95.5% to 100.3% and the limit of detection of 0.24ng/mL;（3）Pb content in 97% of 34 samples is less than 2.0mg/kg.