Transverse heated filter atomizer for electrothermal atomic absorption spectrometry

Feasibility of filter atomization in high-resolution continuum source atomic absorption spectrometry

“…For both metals calibration curves showed proportionality to the introduced mass of the analyte, including volumes up to at least 50 μL. This limit in volume appears to be lower than that claimed earlier [15]. The reason for that is not clear yet.…”

“…Optical arrangement of the line source based AA instruments employed earlier with filter atomization [15][16][17][18][19][20][21][22][23][24] place rigorous restrictions on both parameters. Light losses due to reduced aperture of the light beam and intense radiation from the filter at high temperatures caused increase of noise from the photo detectors and, respectively, limited opportunities for the determination of less volatile elements.…”

“…Filter atomization in conventional AAS based on line sources was used as alternative to the traditional platform tube technique for the direct determination of high and medium volatile elements in samples associated with strong spectral and chemical interferences [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. It provided reduction of interferences without involvement of chemical modifiers and the possibility for using larger sampling volumes of organic or inorganic liquids, while keeping the temperature program short.…”

Transverse heated filter atomizer: optimization of design and heating mode

“…It has been found previously 1 that the reduction in diameter of the THFA analytical zone below 0.2 cm caused significant loss of light from the radiation source and, therefore, deteriorated the limit of detection. The thickness of the filter wall both in the center and the end is determined by the mechanical properties of graphite and can hardly be decreased below 0.05 cm.…”

“…The transverse heated filter atomizer 1 (THFA) shows good performance in the atomic absorption determination of volatile elements in samples associated with high levels of chemical and spectral interferences, including organic liquids. [2][3][4] Nevertheless, it should be admitted that the analytical results [1][2][3][4] need additional verification, as they were obtained with individual atomizers specially prepared for the experiments. Since the THFA (Fig.…”