Abstract
Sorptive properties of the Transcarpathian clinoptilolite towards Pr(III) were studied under dynamic conditions. The sorption capacity of clinoptilolite under optimal conditions (sorbent grain diameter of 0.20–0.31 mm; pH 9.0, temperature of preliminary precalcination of 350 °C, and flow rate of the Pr(III) salt solution with the concentration of 1.0 μg·mL−1 through the sorbent of 5 mL·min−1) was equal to 47.5 mg·g−1. The best desorbent of Pr from the clinoptilolite was the 1 M solution of KCl acidified with HCl to a pH value of 3.0. The method of Pr(III) trace amounts preconcentration in a solid phase extraction mode with further determination of this REE via spectrophotometric technique was developed. The linearity of the proposed method was evaluated in the range of 2–100 ng·mL−1 with detection limit of 0.7 ng·mL−1.
Highlights
Lanthanides (Ln) possess unique chemical and physical properties, which lead to their wide applications in different branches of industry
Praseodymium is a component of alloys for the preparation of magnets, aviation engines, and electrodes
The estimation of praseodymium and other rare Earth element (REE) content has been used for the authentication of trademark wines [1]
Summary
Lanthanides (Ln) possess unique chemical and physical properties, which lead to their wide applications in different branches of industry. Methods of Pr determination mostly require a thorough sample pretreatment, which includes preconcentration, separation and withdrawal of this Ln. In recent years, the method of solid phase extraction is used in sample preparation for analysis because of its high recovery, high enrichment factor, rapid phase separation, application of small volumes of organic solvents and low cost [2]. The method of solid phase extraction is used in sample preparation for analysis because of its high recovery, high enrichment factor, rapid phase separation, application of small volumes of organic solvents and low cost [2] This method of samples pre-treatment is demanded even during the analysis of samples with such selective and highly sensitive methods as energy dispersive X-ray fluorescence and inductively coupled plasma [3,4,5,6,7,8]. The solution to these problems is to a large extent connected with the application of efficient selective sorbents of this lanthanide
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