有机试剂对Al在AAS测定中灵敏度的影响

• 作 者: 魏方 敖登高娃 林帆
• 机 构: 内蒙古大学化学系!内蒙古呼和浩特010021,内蒙古大学化学系!内蒙古呼和浩特010021,南开大学化学系!天津300071
• 出 处: 内蒙古大学学报(自然科学版)
• 发表日期: 2000年02期
• 关键词: Al的原子吸收测定 空气-乙炔火焰 有机增敏剂

实验表明有机溶剂及试剂在合适的酸度范围内对Al在AAS测定中具有增敏作用 .研究了若干种阴离子的影响 ,HNO3 ,HClO4 及HCl较之H3 PO4 要好 ,而H2 SO4 在较低浓度时就抑制了Al的吸收 ,表面活性剂的增敏主要是由于降低了表面能 ,提高了雾化效率 ,减小了雾滴半径提高了原子化效率 .键合原子是对原子化过程起决定性作用的 .N -N ,N -O及胺类 ,吡啶类均有很好的增敏作用

Experiments show that organic solvents and reagents sensitize Al to AAS determination in the proper range of acidity.The effects of several anions are studied, HNO3, HClO4 and HCl are better than H3PO4, and H2SO4 is lower than that of H3PO4 The absorption of Al is inhibited, and the sensitization of the surfactant is mainly due to the reduction of the surface energy, the improvement of the atomization efficiency, the reduction of the droplet radius and the improvement of the atomization efficiency. The bonding atom plays a decisive role in the atomization process .N -N, N -O and amines, pyridine have a good sensitizing effect