As. Amin, Utilization of solid phase spectrophotometry for determination of trace amounts of beryllium in natural water, ANALYT CHIM, 437(2), 2001, pp. 265-272
simple, sensitive and accurate procedure for the determinations of trace am
ounts of beryllium has been developed, based on solid-phase spectrophotomet
ry. Beryllium reacts with aurintricarboxylic acid (ATCA) in the presence of
ethylene-diaminetetraacetic acid to give a complex with a high molar absor
ptivity (1.50 x 10(7) 1 mol(-1) cm(-1)), which is fixed on a dextran-type a
nion-exchange gel (Sephadex DEAE A-25). The absorbance of the gel, at 575 a
nd 750 nm, packed in a 1.0 mm cell, is measured directly. Calibration is li
near over the range 0.03-1.0 mu gl(-1) with RSD of <2.4% (n = 8.0). The det
ection and quantification limits of the 500 mi sample method are 6.0 and 20
ng l(-1) using 90 mg. For 1000 mi sample the detection and quantification
limits are 5.0 and 17 ng l(1) using 45 mg exchanger. Increasing the sample
volume can enhance the sensitivity. The proposed methods have been applied
to the determination of beryllium in tap, mineral and well water using the
standard addition technique with recoveries of 100.13 <plus/minus> 0.61, 99
.47 +/- 1.41 and 100.10 +/- 1.53, and concentration levels of 0.032, 0.221
and 10.92 mu gl(-1), respectively. (C) 2001 Elsevier Science B.V. All right
s reserved.