原子吸收光谱法测定南瓜吸收镉的研究

利用原子吸收分光光度计对南瓜吸收重金属镉的特性进行了研究。结果表明，随着镉浓度的增加，南瓜对镉的吸收量增大;随着水培时间的延长，南瓜对镉的吸收量增加，水培8 h后吸收量基本趋于饱和;吸收高峰在水培后2 h时出现，而后随时间的延长而逐渐降低。酸性和碱性条件较中性条件下南瓜植株对镉的吸收量均有下降，在pH 3条件下吸收量最小，pH 7条件下吸收量最大。

Study on Cadmium Absorption in Pumpkin by Atomic Absorption Spectrophotometry

A study was carried out on the characteristic of cadmium absorption in pumpkin by, atomic absorption spectrophotometer. The results show that the cadmium absorption amount in pumpkin increased with the increase in cadmium concentration. Meanwhile the cadmium absorption amount in pumpkin increased with time. Eight hours after being cultured in the liquid, the cadmium absorption amount became saturated. The cadmium absorption rate reached the peak after 2 hours, then the absorption rate gradually reduced. The cadmium absorption amount in pumpkin is less in acid or alkali compared with neutral condition. And the absorption amount became minimum in pH 3, while maximum in pH 7.