A novel method for extractive spectrophotometric determination of uranium by Azur II dye in some geological samples

Orabi, Ahmed H.; Abdulmoteleb, Shaimaa Salah; Ismaiel, Doaa A.; Falila, Nagwa Ibrahim

doi:10.1080/03067319.2020.1861258

Cited by 1 publication

(1 citation statement)

References 53 publications

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“…There are several reported techniques capable of detecting uranium in environmental samples, such as: fluorometry [ 8 , 9 ], X-ray fluorescence [ 10 , 11 ], potentiometry [ 12 , 13 ], inductively coupled plasma emission spectrometry (ICP OES) [ 14 , 15 , 16 ], inductively coupled plasma mass spectrometry (ICP-MS) [ 17 , 18 ], and spectrophotometry [ 5 , 19 , 20 , 21 , 22 , 23 ]. Among all these techniques, spectrophotometry has a lot of applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Application of a New Polymer with Imprinted Ions for the Preconcentration of Uranium in Natural Water Samples and Determination by Digital Imaging

et al. 2023

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This work proposes the synthesis of a new polymer with imprinted ions (IIP) for the pre-concentration of uranium in natural waters using digital imaging as a detection technique. The polymer was synthesized using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP) for complex formation, ethylene glycol dimethacrylate (EGDMA) as a crosslinking reagent, methacrylic acid (AMA) as functional monomer, and 2,2′-azobisisobutyronitrile as a radical initiator. The IIP was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy (FTIR). Uranium determination was performed using digital imaging (ID), and some experimental conditions (sample pH, eluent concentration, and sampling flow rate) were optimized using a two-level full factorial design and Doelhert response surface methodology. Thus, using the optimized conditions, the system allowed the determination of uranium with detection and quantification limits of 2.55 and 8.51 µg L−1, respectively, and a pre-concentration factor of 8.2. All parameters were determined using a 25 mL sample volume. The precision expressed as relative deviation (RSD%) was 3.5% for a solution with a concentration of 50 µg L−1. Given this, the proposed method was used for the determination of uranium in four samples of natural waters collected in the city of Caetité, Bahia, Brazil. The concentrations obtained ranged from 35 to 75.4 μg L−1. The accuracy was evaluated by the addition/recovery test, and the values found ranged between 91 and 109%.

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