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Determination of trace amounts of beryllium using derivative spectrophotometry in non-ionic micellar medium
Authors:Singh H B  Agnihotri N K  Singh V K
Affiliation:

a Department of Chemistry, University of Delhi, Delhi 110007, India

b Department of Chemistry, Motilal Nehru College, Benito Juarez Road, New Delhi-110021, India

c Department of Chemistry, Sri Aurobindo College, Malviya Nagar, New Delhi-110017, India

Abstract:
A rapid and sensitive method for the trace level determination of beryllium based on the formation of a 1:2 complex (λmax 560 nm) with 1,4-dihydroxy-9,10-anthracenedione in an aqueous medium containing Triton X-100 is reported. Beer’s law is followed in the range 3.60–360 ng ml−1 of Be(II). The molar absorptivity and Sandell’s sensitivity are 1.68×104 l mol−1cm−1 and 0.54 ng cm−2, respectively; detection limit is 0.23 ng ml−1 of Be(II). Analysis of synthetic mixtures of composition similar to that of alloys and spiked samples of distilled water, gave results that are in agreement with their beryllium content.
Keywords:Beryllium(II) determination   Non-ionic surfactant   Derivative spectrophotometry   1,4-Dihydroxy-9,10-anthracenedione   Peak height   Trough depth
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