Study of resonance and non-resonance atomic fluorescence transitions in plasma spectrometry

Abstract

Results obtained with the “atomiser, source, inductively coupled plasmas in atomic fluorescence spectrometry”(ASIA) instrument demonstrate remarkable freedom from spectral interference for elements that exhibit the effect in ICP-AES. Narrow band pass interference filters have been used to select the wavelength of excitation for fluorescence measurements and the resonance and non-resonance spectrum of lead has been recorded. Part per billion sensitivity has been achieved at several non-resonance wavelengths and the system has been shown to be useful in the determination of fluorescence mechanisms. Power line filters and earth chokes have been included in the instrument giving an over-all improvement in the noise levels observed.