Determination of beryllium in water by ion-exchange spectrofluorimetry

Abstract

A method for the determination of trace amounts of beryllium has been developed, based on ion-exchange spectrofluorimetry. Beryllium reacts with morin to give a highly fluorescent complex, which was fixed on a dextran-type anion-exchange resin. The fluorescence of the resin, packed in a I-mm quartz cell, was measured directly using a solid-surface attachment. The concentration range of the method is 0.10-0.70 pg 1-1, the relative standard deviation 1.4% and the detection limit 0.02 pg I-'. The method was applied to the determination of beryllium in natural waters. The aluminium and calcium levels can be determined first in order to reduce their interfering effect. The proposed method is more sensitive and selective than that using morin alone.

Determination of Trace Aluminum in Natural Waters by Ion Exchanger Fluorometry

“…A similar effect is observed in the Be(II)-morin system fixed on Sephadex QAE. 8 From a study of the half-life time (r) of the excited state of the complex in the gel phase at different temperatures, we infer that the luminescence process is most probably fluorescence (z<5X 10-6 s). …”

Cloud-Point Formation Based on Mixed Micelles for the Extraction, Preconcentration and Spectrophotometric Determination of Trace Amounts of Beryllium in Water Samples

“…Several instrumental methods for the determination of beryllium by spectrophotometry, [12][13][14][15] spectrofluorometry, [16][17][18] atomic absorption spectrometry (AAS), 19 graphite furnace atomic absorption spectrometry (GFAAS), 20 and inductively coupled plasma atomic emission spectrometry (ICP-AES) 21 have been reported. In contrast to the majority of these expensive and sophisticated analysis systems, absorption spectrophotometric methods offer many appealing characteristics, including simple instrumentation, rapid response times and easy operation.…”

Simultaneous Kinetic Determination of Beryllium and Aluminium by Spectrophotometric H-Point Standard Addition Method

“…Several instrumental methods for determination of beryllium and aluminium by spectrophotometry, [1][2][3] spectrofluorimetry, [4][5][6][7] flame atomic absorption spectrometry (AAS), 8 graphite furnace atomic absorption spectrometry (GFAAS), 9 and inductively coupled plasma atomic emission spectrometry (ICP-AES) 10 have been reported. The complexes of Be(II) and Al(III) with Chrome Azurol S (CAS) have been proposed for the spectrophotometric determination of both the elements individually.…”

“…11,12 Simultaneous determination of Al(III) and Be(II) was also reported. [13][14][15] Capitán et al 13 determined Al(III) and Be(II) in mixtures in the range of 0.5 -5.0 ng mL -1 for both the cations, by first-derivative synchronous solid-phase spectrofluorometry, based on their complexes with morine.A derivative spectrophotometric method for simultaneous determination of Al(III) and Be(II) in the ranges of 108.0 -1080.0 ng mL -1 and 36.0 -360.0 ng mL -1 , respectively, was reported based on their complexes with 5,8-dihydroxy-1,4-naphthoquinone. 14 Valencia et al 15 reported a method for simultaneous determination of Al(III) and Be(II) by first derivative solid phase spectrophotometric method based on their complexes with Eriochrome Cyanine R. The application range was up to 60 ng mL -1 for aluminium and up to 4.0 ng mL -1 for beryllium.…”