对使用次灵敏线和正灵敏线作为火焰原子吸收法波长测定废水中的铅含量。结果表明,使用次灵敏线作为测定波长,测定结果的灵敏度较高,但背景谱线干扰较大,精密度偏低;用正灵敏线分析则灵敏度降低,背景谱线干扰降低,精密度较高。 Determination of Lead in Wastewater Using Secondary Sensitive Lines and Positive Sensitive Lines as Flame Atomic Absorption. The results show that using the second sensitive line as the measuring wavelength, the sensitivity of the measurement result is high, but the interference of the background line is larger and the precision is lower. With the positive line analysis, the sensitivity is decreased, the background line interference is reduced, and the precision is high .