Sorption-luminescence method for determination of ytterbium

Abstract

Sorption-luminescence method for ytterbium determination based on natural Transcarpathian clinoptilolite was proposed. The optimal luminophore preparation conditions are Yb(III) sorption on the precalcined at 300 °C clinoptilolite and further treatment of clinoptilolite-Yb(III) samples with 1-(2-pyridylazo)-2-naphthol and ethonium solution at pH 8.5. A sample of luminophore clinoptilolite-Yb(III)-PAN-ethonium was heated at 50°С. The linear calibration range of Yb(III) concentration with the detection limit of 5 ng·mL⁻¹ is within 12.5–1000 ng·mL⁻¹. The proposed method can be used for ytterbium determination in the presence of many rare earths. The method gives recoveries from 92.5% to 103% and RSD from 3.1% to 5.8% determination of ytterbium.

Keywords:

• Clinoptilolite
• PAN
• sorption-luminescence determination
• ytterbium

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was partially funded by the Ministry of Education and Science of Ukraine under Project KhA-87F and KhA-32F.