Direct observation of flame atomic absorption spectral interferences

Continuum source atomic absorption spectrometry in a graphite furnace with photodiode array detection

“…Spectral interferences, though rare, have been directly observed in CSAAS (21). These interferences have also been corrected with the use of wavelength modulation (22).…”

Performance characteristics of a continuum-source wavelength-modulated atomic absorption spectrometer

“…Such a wavelength-modulated atomic absorption spectrometer using a continuum source (WM-AAC) offers two useful advantages over conventional line-source atomic absorption (AAL) instrumentation for spectrochemical analyses: (i) a single primary source provides a rapid and economical means for surveying a large number of elements in a sample without the costly investment in individual hollow cathode or electrodeless discharge lamps normally required, and (ii) the versatile dynamic background correction capabilities inherent in the wavelength modulation technique (3,4) permit more complex samples to be analyzed with minimal time-consuming chemical pretreatment procedures. In recent years, further development of a single-channel WM-AAC system into a fully background-corrected atomic absorption instrument for simultaneous multielement analyses has been demonstrated (5)(6)(7)(8)(9)(10)(11)(12).…”

Continuum source atomic absorption spectrometry and detector technology: A historical perspective

“…Resonance lines for the elements Ca, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, Se, Sn, V and Zn could thus be recorded simultaneously, and the calculated absorbances were all shot noise limited. Similar systems were used by several groups for many fundamental [71][72][73][74][75][76][77][78][79][80][81][82][83][84] as well as applied [85][86][87][88][89][90][91][92][93][94][95] studies, and are also described in a number of overview papers [96][97][98][99][100]. In a detailed analysis [97], O'Haver and Messman stated that the undoubted advantages, in particular flexibility and excellent background correction, were unfortunately counterbalanced by the disadvantage that for elements with resonance lines at wavelengths shorter than 250 nm LODs were significantly poorer with CS AAS than with LS AAS.…”