用硝酸镧示踪和电子探针－Ｘ射线能量色散谱分析（ＥＤＸ）研究人参皂甙和维生素Ｃ在低浓度铅作用下对血－脑界面阻抑铅透入脑实质的能力。结果显示：单用人参皂甙不能在血－脑界面阻档铅透入脑实质，故无明显的阻抑铅神经毒性的作用，而人参皂甙与维生素Ｃ合用，则对铅从血液透入脑实质有一定的阻抑作用。提示人参皂甙与维生素Ｃ合用对铅的神经毒作用有保护作用 Lanthanum nitrate tracing and electron probe-X-ray energy dispersive spectroscopy (EDX) were used to study the ability of ginsenosides and vitamin C to inhibit lead penetration into brain parenchyma at the blood-brain interface under the action of low concentration of lead. The results showed that ginsenoside alone could not penetrate the brain parenchyma at the blood-brain interface, so there was no obvious inhibition of lead neurotoxicity, whereas ginsenosides combined with vitamin C, Have a certain inhibitory effect. Tip ginsenosides and vitamin C combination of lead has a protective effect on neurotoxicity