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利用改进的微波等离子体炬（ＭＰＴ）为光源，并以活性炭为吸附剂，进行在线分离富集，研究了原子发射光谱法测定铁。实验结果表明，改进的炬管改善了ＭＰＴ的分析性能。用该分离富集方法测定铁时消除了碱金属和碱土金属的干扰，测得铁的检出限为０００４７ｍｇ／Ｌ。测定工业硅及自来水等实际样品中铁含量时，也得到了令人满意的结果。
An improved on - line microwave plasma torch (MPT) was used as light source, and activated carbon was used as adsorbent for on - line separation and enrichment. The atomic emission spectrometry was used to determine iron. The experimental results show that the improved torch improves the analytical performance of the MPT. The determination of iron by the separation and enrichment method eliminates the interference of alkali metals and alkaline earth metals, and the detection limit of iron is 00047mg / L. Satisfactory results have also been obtained when determining the iron content in commercial samples such as industrial silicon and tap water.