Development and Application of Acousto-Optic Background Correction for Inductively Coupled Plasma Atomic Emission Spectrometry

摘要

In two con gurations, a solid-state acousto-optic (AO) de ector ormodulator is mounted in a 0.5 m monochromator for backgroundcorrection with inductively coupled plasma atomic emission spectrometry(ICP-AES). A fused silica acousto-optic modulator (AOM)is used in the ultraviolet (UV) spectral region applications while aglass AO de ector (AOD) is used for the visible (VIS) region. Thesystem provides rapid sequential observation of adjacent on- andoff-line wavelengths for background correction. Seventeen elementsare examined using pneumatic nebulization (PN) and electrothermalvaporization (ETV) sample introduction. Calibration plots wereobtained with each sample introduction technique. Potable waterand vitamin tablets were analyzed. Flame atomic absorption (FAA)was used to verify the accuracy of the AO background correctionsystem.