関連する実験動画

Updated: Sep 10, 2025

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability

Published on: June 21, 2015

Br-PADAPを用いた水中のウランのフィールド展開可能なスペクトロフォトメトリック測定

Fengyun Zhang¹, Yaoqi Wei¹, Yaping Zhang¹

¹School of Intelligent Materials and New Energy, Yuzhang Normal University, Nanchang 330031, China. xfliang96@163.com.

Analytical methods : advancing methods and applications

|August 26, 2025

まとめ

この研究では,有毒なフッ素酸ナトリウム (SDS) ではなく,ドデシル硫酸ナトリウム (U(VI)) の測定のための環境に優しい光譜測定法が導入されています. この新しい方法は環境水分析に敏感で迅速で正確です

科学分野:

分析化学
環境科学
スペクトルフォトメトリー

背景:

Br-PADAPスペクトロフォトメトリック法は,ウラン (U ((VI)) の測定に敏感である.
従来の方法では有毒なフッ素ナトリウムが用いられ環境に危険を及ぼす
より安全なU (VI) の定量化には,環境に優しい代替手段が必要である.

研究の目的:

U (VI) の測定のための環境に優しい光譜測定法を開発し,検証する.
毒性のあるフッ素酸ナトリウムを硫酸ナトリウムドデシル (SDS) で置き換える
パラメータを最適化し,メソッドの性能と信頼性を評価する.

主な方法:

Br-PADAPを用いたU (VI) のスペクトロフォトメトリック測定
pHの最適化,反応剤のステキオメトリー,および反応運動.
吸収性,安定性,線形性,干渉耐性などのパラメータを体系的に評価する.
環境水サンプルでのピーク回復試験による検証

主要な成果:

Br-PADAP-U(VI) コンプレックスは,最大吸収率を576 nm (ε = 4.33 × 104 L mol−1 cm−1) で示している.
この方法は素早く,安定して (>4時間),0. 0~4. 0μg/mL U(VI) で,サンデル感度が0. 0055μgcm−2である.
共存イオンに対する高い耐性,環境サンプルでの有効性 (96.4~104%の回収率).

結論:

開発された SDS ベースの Br-PADAP 方法は,U ((VI) の定量化のための安全でシンプルで迅速で正確な代替手段を提供します.
このエコフレンドリーなアプローチは,フィールド展開可能なU (VI) 分析に適しています.
伝統的な方法に関連した環境と運用上のリスクに効果的に対処します.

さらに関連する動画

Automated 90Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level

Automated 90Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level

Published on: June 6, 2018

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films

Published on: November 9, 2015

関連する概念動画

UV–Vis Spectrometers

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.

Atomic Fluorescence Spectroscopy

Atomic Fluorescence Spectroscopy

Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which...

Precipitation Titration: Endpoint Detection Methods

Precipitation Titration: Endpoint Detection Methods

In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
In the Volhard method, a standard excess of AgNO3 is first added to the...

Atomic Absorption Spectroscopy: Lab

Atomic Absorption Spectroscopy: Lab

For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing...

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material, molecules absorb light depending on the energy required for...