Abstract
An optosensing method for gadolinium based on the room-temperature phosphorescence behavior in aqueous solution induced by the transient adsorption of the complex formed by 1,4-bis (1′-phenyl-3′-methyl-5′-pyrazolone-4′-)butanedione (1,4) with Gd (III) on the chelating resin Chelex 100 (packed in a flow cell) is proposed. The proposed optosensing is satisfactory for the determination of the gadolinium ion in the range 8 × 10–7−5 × 10−5 M with a correlation coefficient of 0.995. The relative standard deviation was 2.0% for determination of 5× 10−6 M gadolinium ion (n = 10). The response mechanism of the optosensing and the interferences of other lanthanide ions were also investigated. The method has been used to determine gadolinium ion in synthetic sample.
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Gong, Z., Zhang, Z. Room temperature phosphorescence optosensing for gadolinium. Mikrochim Acta 126, 117–121 (1997). https://doi.org/10.1007/BF01242672
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DOI: https://doi.org/10.1007/BF01242672