Transverse heated filter atomizer: optimization of design and heating mode

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

“…In GFA with equal diameter and mass of collector an enlargement of the filter from 6 to 10 mm resulted in an increase of absorption peak area for Pb ( Larger mass of collector caused longer delay in sample vaporization and, thus, a reduction of interferences due to higher gas temperature in the absorption volume [16,17]. The data for GFA No.…”

“…Estimations [16,17] show that the sensitivity of GFA should increase in conjunction with the reduction of diameter and increase of filter length. 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.…”

“…According to the information dispersed in [16][17][18][19][20][21][22][23][24], erosion of the components can affect analytical performances and lifetime of the GFA. Apart from high atomization or cleaning temperatures, aggressive action of steam during hot drying and that of sample matrix during the pyrolysis and atomization steps can be expected [21].…”

“…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.…”