Zhu Jia-ye, Yi Xiao-juan, Ding Xiao-feng
Zhangjiagang Entry-Exit Inspection and Quarantine Bureau of P.R.C, Zhangjiagang 215633, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2003 Apr;23(2):380-2.
The determination of lead in import ginseng was studied, where microwave assimilation offers a quick, safe and accurate approach with little pollution compared to conventional methods. In the measurements graphite-furnace atomic absorption spectrometry (GFAAS) was used with the advantages of high sensitivity, high speed and little wastage. The microwave assimilation was programed, the mixed acid was analyzed, the problem of the effect of final assimilating liquid on the inspection results was solved, and the inspection conditions of GFAAS were studied. Based on the many experimental results, the suitable incinerating temperature and atomizing temperature were chosen, and the final graphite-furnace temperature-rising program was determined. This method shows a linear range of 0-100 micrograms.L-1, a determination limit of 2.80 micrograms.L-1, a relative standard deviation of 0.91% and a recovery of 98.13%. The precision and accuracy are satisfying.
对进口人参中的铅含量测定进行了研究，与传统方法相比，微波消解提供了一种快速、安全、准确且污染小的方法。在测量中使用石墨炉原子吸收光谱法（GFAAS），其具有灵敏度高、速度快和损耗小的优点。对微波消解进行了程序设定，分析了混合酸，解决了最终消解液对检测结果的影响问题，并研究了GFAAS的检测条件。基于众多实验结果，选择了合适的灰化温度和原子化温度，确定了最终的石墨炉升温程序。该方法线性范围为0 - 100微克·L⁻¹，测定限为2.80微克·L⁻¹，相对标准偏差为0.91%，回收率为98.13%。精密度和准确度令人满意。
