Solid-phase Spectrophotometric Determination of Mo(VI) using Organopolymeric Cation Exchange Resin KU-2-8 Modified by 6,7-dihydroxy-2-phenyl-4-methylbenzopyrylium chloride

IF 0.7 Q4 CHEMISTRY, ANALYTICAL

Methods and Objects of Chemical Analysis Pub Date : 2022-01-01 DOI:10.17721/moca.2022.10-16

O. Zhukovetska, E. Guzenko, A. Chebotarev, D. Snigur

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引用次数: 2

Abstract

The current work is devoted to the study of a sorbent based on organopolymeric cation exchange resin KU-2-8 modified with 6,7-dihydroxy-2-phenyl-4-methylbenzopyrylium chloride for preconcentration and solidphase spectrophotometric determination of Mo(VI) microquantities. The optimal conditions for the preconcentration of Mo(VI) by the proposed sorbent were found to be: pH 5.5, a portion of the sorbent 0.5 g with a grain diameter of 0.43 ÷ 0.50 mm with shaking for 60 min (for static mode) or at a rate of 2 cm3/min with using a column with a 10 mm diameter (for dynamic mode). The calibration graph for solid-phase spectrophotometric determination of Mo(VI) after its sorption preconcentration using the modified sorbent in static mode is linear in the concentration range of 0.15-4.24 mg/dm3, and the values of the limit of detection and limit of determination are 0.05 and 0.15 mg/dm3 respectively. The proposed method was tested in the analysis of a sample of peas with a relative standard deviation no more than 4.9 %.

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6,7-二羟基-2-苯基-4-甲基苯并氯化苄基改性有机高分子阳离子交换树脂KU-2-8固相分光光度法测定Mo(VI

本文研究了6,7-二羟基-2-苯基-4-甲基苯并氯吡啶改性的有机高分子阳离子交换树脂KU-2-8为吸附剂，用于预富集固相分光光度法测定微量Mo(VI)。发现该吸附剂预富集Mo(VI)的最佳条件为:pH为5.5，部分吸附剂0.5 g，粒径为0.43 ÷ 0.50 mm，振荡60分钟(静态模式)或以2 cm3/min的速率使用直径为10 mm的柱(动态模式)。在0.15 ~ 4.24 mg/dm3的浓度范围内，改性吸附剂在静态模式下吸附预富集后固相分光光度法测定Mo(VI)的校准图呈线性关系，检出限和测定限分别为0.05和0.15 mg/dm3。该方法在豌豆样品的相对标准偏差不超过4.9%的情况下进行了检验。

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来源期刊

Methods and Objects of Chemical Analysis CHEMISTRY, ANALYTICAL-

CiteScore

1.00

自引率

14.30%

发文量

期刊介绍： The journal "Methods and objects of chemical analysis" is peer-review journal and publishes original articles of theoretical and experimental analysis on topical issues and bio-analytical chemistry, chemical and pharmaceutical analysis, as well as chemical metrology. Submitted works shall cover the results of completed studies and shall make scientific contributions to the relevant area of expertise. The journal publishes review articles, research articles and articles related to latest developments of analytical instrumentations.