• Title/Summary/Keyword: Chemical effect

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Effect of Fluoride Ion in the Analysis of Tin by HG-ICP-AES (HG-ICP-AES법에 의한 Tin 분석시 플루오르화 이온의 영향에 대한 연구)

  • Lim, Heon-Sung;Cho, Sung-Il;Lee, Sueg-Geun
    • Analytical Science and Technology
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    • v.14 no.5
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    • pp.416-421
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    • 2001

  • The optimization of the reductant and acid concentration for stannane($SnH_4$) generation was investigated by using a continuous flow hydride generator combined with an inductively coupled plasma-atomic emission spectrometer. Several different prereductants were studied to remove the interfering effect of fluoride ion on the hydride generating of tin. The optimum acid concentration was 0.5-1.0 M for the 1-2% $NaBH_4$ and 1.0 M NaOH and the interfering effect of fluoride ion was minimized using boric acid and L-cysteine mixed solution as a prereductant. The reconveries of tin at 20 ng/mL level in the solution containing fluoride ion were 100~108 %.

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Catalytic Application of Metal-Organic Frameworks for Chemical Fixation of CO2 into Cyclic Carbonate (CO2로부터 5원환 탄산염의 화학적 고정화 반응을 위한 Metal-Organic Frameworks의 촉매적 응용)

  • Ji, Hoon;Naveen, Kanagaraj;Kim, Dongwoo;Cho, Deug-Hee
    • Applied Chemistry for Engineering
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    • v.31 no.3
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    • pp.258-266
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    • 2020

  • The chemical fixation of CO2 into cyclic carbonates is considered to be one of the most promising way to alleviate global warming and produce fine chemicals. In this work, the catalytic applicability of metal-organic frameworks (MOFs) as porous crystalline materials for the synthesis of five-membered cyclic carbonate from CO2 and epoxides was reviewed. In addition, we have briefly classified the materials based on their different structural features and compositions. The studies revealed that MOFs exhibited good catalytic performance towards cyclic carbonate synthesis because of the synergistic effect between the acid sites of MOFs and nucleophile. Moreover, the effect of structure of designed MOFs and mechanism for the cycloaddition of CO2 were suggested.

  • https://doi.org/10.14478/ace.2020.1030 인용 PDF KSCI