Fan Hua-jun, Li Gong-ke, Luan Wei, Cai Pei-xiang
School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2005 Sep;25(9):1503-6.
A new method using microwave digestion technique was developed for the determination of cadmium, chromium and lead in Lycoris radiata by graphite furnace atomic absorption spectrometry (GFAAS). Digestion solvents were discussed for sample preparation by microwave digestion technique. The optimum condition of determination by GFAAS was studied in the presence of NH4H2PO4 matrix modifier. The detection limits of Cd, Cr and Pb are 0.066 7, 1.22 and 0.810 microg x L(-1), respectively. The method was applied to the determination of Cd, Cr and Pb in Lycoris radiata samples with satisfactory results. The RSD of determination were lower than 3.1%. The recoveries were from 83.8% to 118%.
建立了一种利用微波消解技术结合石墨炉原子吸收光谱法（GFAAS）测定石蒜中镉、铬和铅的新方法。讨论了用于微波消解技术样品制备的消解溶剂。研究了在磷酸二氢铵基体改进剂存在下石墨炉原子吸收光谱法的最佳测定条件。镉、铬和铅的检出限分别为0.066 7、1.22和0.810 μg·L⁻¹。该方法应用于石蒜样品中镉、铬和铅的测定，结果令人满意。测定的相对标准偏差低于3.1%。回收率在83.8%至118%之间。
