Chrome Azurol S (CAS) has been used as a chromogenic reagent in the design 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 compatibility, stability, reaction speed, sensitivity and freedom from interferences. A linear relationship existed between PTS signal amplitude and Be(II) concentration for the concentration range of 0.1-15 μg 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 field.

Beryllium, Chrome Azurol S, Complexation, Photothermal spectrometry, UV-Visible spectrophotometry
Analytica Chimica Acta
Department of Chemistry

Lai, E.P.C, Statham, B.D. (Brian D.), & Ansell, K. (Kathleen). (1993). Determination of beryllium(II) on solid substrates by photothermal spectrometry after selective complexation with Chrome Azurol S. Analytica Chimica Acta, 276(2), 393–399. doi:10.1016/0003-2670(93)80410-M