At present determine the lead, the copper in food commonly used atom absorption law. This article proposed dissolves at the same time the law with the electric potential to determine the lead, the copper in the tea. This method instrumentation equipment simple, and easy to popularize the promotion, it concentrates through the electrodeposition, concentrated the low density ion, enhanced the sensitivity. The sample after the aqueous method digestion, the suitable dilution might the immediate determinant, thi...
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This method instrumentation equipment simple, and easy to popularize the promotion, it concentrates through the electrodeposition, concentrated the low density ion, enhanced the sensitivity.
该方法仪器设备简单，容易普及推广，它通过电积富集，把低浓度的离子富集，提高了灵敏度。
EM observations indicate that the dislocation density is very low in the ELO reg ion.
透射电子显微镜的观测表明在ELO范围内位错密度很低。
It is suggested that the instability is excited in the low density plasma when the electron beam drift velocities exceed the ion acoustic speed.
不稳定性产生的可能机制是由于电子束穿过低密度本底等离子体的漂移速度超过离子声速而激发起来的。
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