联合应用随同仪器提供的快速自动曲线拟合技术(FACT)校正软件和标准加入法同时消除了在电感耦合等离子体原子发射光谱法(ICP-AES)测定铁基材料中铅含量时的基体干扰和光谱干扰。试验按①常规方法,②标准加入法和③联合应用FACT校正法和标准加入法校正后,用ICP-AES分别测定混合标准溶液中的铅。选用的分析谱线为182,217,220 nm。结果表明: 按①测得的铅量,由于基体负干扰而偏低;按②所得结果接近已知值,这是由于仪器附带的软件有“Fitted”校正功能,当发生光谱干扰时能自动进行校正;按③所得结果准确性最好。将上述成果应用于铁钉样品分析,测得结果的准确度和精密度均较好,基体干扰和光谱干扰都得到了消除。

The FACT software correction technique in combination with standard addition method (SAD) was used to eliminate matrix and spectral interferences simultaneously in ICP-AES determination of lead in ferrous alloys. In the study, ICP-AES determination of lead in mixed solution by the 3 ways separately: ① without correction, ② corrected by SAD method, and ③ corrected by FACT and SAD in combination. Analytical spectral lines of 182, 217, 220 nm were used in the determinations. It was shown that: in case of ①, due to negative effect of matrix interference, low results of lead were obtained; in case of ②, values of lead contents found were very close to the known values. It was supposed that this results was the combining effect of SAD and the automatic “Fitted” correction function of the soft ware installed in the AES instrument; and in case of ③, contents of lead obtained showed highest accuracy. In applying the achievements to analysis of iron nails, content of lead found was very close to the known value, showing that both the matrix and spectral interferences were eliminated effectively.