Sorption Preconcentration Of Silver For Atomic Absorption Analysis And Antibacterial Properties Of The Acid-Modified Clinoptilolite – Ag Composite

IF 0.7 Q4 CHEMISTRY, ANALYTICAL Methods and Objects of Chemical Analysis Pub Date : 2020-01-01 DOI:10.17721/moca.2020.73-82
V. Vasylechko, V. Fedorenko, O. Gromyko, G. Gryshchouk, Y. Kalychak, S. Tistechok, I. Us, A. Tupys
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引用次数: 1

Abstract

Sorptive properties of the acid-modified Transcarpathian clinoptilolite towards Ag(I) were studied under dynamic conditions. It was found that the most effective acid-modifier is 1 M HNO3 solution. The sorption capacity value of H-clinoptilolite under the optimal conditions is 6.15 mg of Ag per 1 g of zeolite. The solid-phase extraction procedure with acid-modified clinoptilolite was used to pre-concentrate trace amounts of silver ions in aqueous solutions and then finally to determine them by the atomic absorption method. Due to the acceptable recoveries (≥ 98 %) and RSD values (2.3-4.7 %) for tap and lake water, the developed method can be successfully applied for the determination of trace amounts of silver ions in the presence of major components of water. It was established that the initial form of clinoptilolite has a better antibacterial effect against E. coli than the H-form. However, antagonistic activity against S. aureus was lower than against E. coli in both forms. The combination of different forms of clinoptilolite with Ag(I) increases their antibacterial activity.
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酸修饰斜沸石-银复合材料的银原子吸收吸附预富集及抗菌性能
在动态条件下研究了酸改性的喀尔巴阡斜沸石对Ag(I)的吸附性能。结果表明,1 M HNO3溶液是最有效的酸调节剂。在最佳条件下,h -斜沸石对银的吸附量为6.15 mg / 1g。采用酸改性斜沸石固相萃取法对水溶液中痕量银离子进行预富集,最后用原子吸收法测定。自来水和湖水的回收率≥98%,RSD值为2.3 ~ 4.7%,可用于自来水和湖水中主要成分中痕量银离子的测定。结果表明,斜发沸石初始形态对大肠杆菌的抑菌效果优于h型。然而,对金黄色葡萄球菌的拮抗活性低于对大肠杆菌的拮抗活性。不同形态的斜沸石与Ag(I)的结合提高了其抗菌活性。
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来源期刊
CiteScore
1.00
自引率
14.30%
发文量
12
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.
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