Epc. Lai et al., DETERMINATION OF BERYLLIUM(II) ON SOLID SUBSTRATES BY PHOTOTHERMAL SPECTROMETRY AFTER SELECTIVE COMPLEXATION WITH CHROME AZUROL-S, Analytica chimica acta, 276(2), 1993, pp. 393-399
Chrome Azurol S (CAS) has been used as a chromogenic reagent in the de
sign of specific reagent strips for the determination by photothermal
spectrometry (PTS) of beryllium(II) in aqueous samples collected on a
membrane filter. This reagent must be carefully formulated for compati
bility, stability, reaction speed, sensitivity and freedom from interf
erences. A linear relationship existed between PTS signal amplitude an
d Be(II) concentration for the concentration range of 0.1-15 mug g-1.
The potential of this method for long-term sample storage is important
in practical applications where the samples cannot be analyzed for Be
(II) immediately after their collection on membrane filters in the fie
ld.