Computer simulation of two-step atomization in graphite furnaces for analytical atomic spectrometry

摘要: The processes of sample fractionation by two-step atomization with the intermediate condensation analyte on a cold surface in graphite furnaces were theoretically studied. transfer equation was solved for atoms, molecules, and condensed particles from flow argon directed along this surface. spatial distributions vapor condensate formed calculated depending composition rate. It found that section length 6 mm is sufficient complete trapping atomic an layer having velocity about 1 m/sec thickness 5 mm. In case, molecules clusters coefficients smaller than unity deposited insignificantly; is, they fractionally separated. results shadow spectral visualization process probe commercial HGA THGA atomizers interpreted. advantages analytical signals upon evaporation these inductively coupled plasma demonstrated.