Abstract

Sorption-luminescent methods for ytterbium and morin determination based on the clinoptilolite were proposed. Optimal luminescent material preparation condition is the sorption of Yb(III) on the precalcined at 50 °C clinoptilolite in the solution with pH 8.0. The obtained clinoptilolite-Yb(III) sample was treated with morin solution. Definable range of Yb(III) concentration with the detection limit of 0.1 μg·mL⁻¹ is within 0.25–1.0 μg·mL⁻¹. The proposed method can be used for ytterbium determination in the presence of many rare earths. The range of the determination concentrations of morin is 3·× 10⁻⁴ − 4·× 10⁻³mol·L⁻¹. The detection limit is 1.5·×·10⁻⁴mol·L⁻¹.

摘要

提出了基于斜发沸石测定镱和桑椹的吸附发光方法。最佳的发光材料制备条件是 Yb(III) 在 50 °C 下预煅烧的斜发沸石在 pH 8.0 的溶液中的吸附。所得斜发沸石-Yb(III)样品用桑椹溶液处理。检测限为0.1 μg·mL ^-1的Yb(III) 浓度可定义范围为0.25-1.0 μg·mL ^-1。所提出的方法可用于在许多稀土存在的情况下测定镱。桑色素的测定浓度范围是3·×10 ^-4 - 4·×10 ^-3摩尔·大号^-1。检出限为1.5·×·10 ^-4 mol·L ^-1。