改进的微波等离子体炬用于原子发射光谱法在线富集测定铁的研究

Improved Microwave Plasma Torch for the Determinationof Iron by Atomic Emission Spectrometry with On line Preconcentration

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０００４７ｍｇ／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 microwave plasma torch was used as the excitation source for the determination of iron by atomic emission spectrometry with on line preconcentration of iron on activated carbon The torch improved the analytical performance The interference of alkali and alkali earth metals in emission intensity can be eliminated by on line separation and preconcentration The detection limit for Fe(Ⅲ) is 0 0047 mg