摘要
本文提出了一种较为简便的测定环境水体中As3+和As5+的方法。在研究了钯涂层石墨管性能的基础上,利用AsCl3的低沸点、高挥发性,在石墨炉升温过程中,使As3+在灰化阶段分离;改变灰化温度可以测定总As含量。
A method for pre-atomization of arsenic for speciation by graphite furnace atomic spectrometer is presented. It is based on conversion of trivalent arsenic in solution into lowboiling arsenic trichloride by strong hydrochloric acid. The AsCl3 gas is pre-atomized to lose at a higher ash temperature, and only As5+ is detected. Subsequent detection of total As is achieved at a lower ash temperature. The tolerance towards the interferents of Cu, Fe, Co,Sb, Te, Bi and are studied.
出处
《光谱学与光谱分析》
CSCD
北大核心
1994年第1期81-84,80,共5页
Spectroscopy and Spectral Analysis