Reduction of spectral interferences in flame emission spectrometry by selective spectral-line modulation

Evaluation of interference filters for spectral discrimination in solution-cathode glow discharge optical emission spectrometry

“…15 In contrast, background correction is difficult with interference lters, as the transmitted wavelength band is xed. Though a variety of instrumental modications would enable background correction (examples include mechanical tilting of the lters, 24 internal standardization with a dual-beam optical system, 20 or selective spectral-line modulation [25][26][27] ), adding them to the lter-wheel instrument would introduce signicant complexity and bulkiness, making them less attractive than a traditional spectrometer. Methods that correct for interferences without instrument modication are more desirable.…”