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A Comparative Voltammetric Study of a Chemically Modified Octa(3-Aminopropyl)Octasilsesquioxane and DAB-AM-16 Dendrimer Supported on the Silica Gel Surface for Dipyrone Detection
Silicon ( IF 3.4 ) Pub Date : 2020-05-08 , DOI: 10.1007/s12633-020-00437-x
Devaney Ribeiro do Carmo , Priscila Fernanda Pereira Barbosa , Suelino Gabriel Junior

Octa(3-aminopropyl)octasilsesquioxane and DAB-AM-16 dendrimer, due to their specific chemical and physical properties, give wide application in various fields of science. Because they have a large number of NH2 reactive groups at their ends, they are capable of interacting with different substances, generating in this way different compounds with enormous analytical potential that can be used in the electrocatalytic determinations and oxidations of some substances of environmental and biological interest. In this work, after a rigorous voltammetric study, the electroanalytical potentiality of the chemically Ni2+ metal ions chealed silica gel surface modified with octa(3-aminopropyl)octasilsesquioxane and DAB-AM-16 dendrimer was tested for dipyrone detection. The cyclic voltammogram of the graphite paste electrode, with both materials (20% w/w) showed two redox process. The following formal potential (Eθ′) values for both materials were identical: (Eθ′)I = 0,26 V; (Eθ′)II = 0,51 V vs Ag/AgCl (KCl = 1.0 mol L−1; v = 20 mV s−1). For dipyrone detection assay, the limite of detection were of 9.17 × 10−5 mol L−1 with an amperometric sensitivity of 15.78 mA / mol L−1 with a relative standard deviation of ±3% (n = 3) and of 4.79 × 10−4 mol L−1 with an amperometric sensitivity of 11.10 mA / mol L−1 with a relative standard deviation of ±2% (n = 3) respectively for silica gel surface modified with octa(3-aminopropyl)octasilsesquioxane and DAB-AM-16 dendrimer.



中文翻译:

硅胶表面负载双吡酮的化学改性八(3-氨基丙基)八倍半硅氧烷和DAB-AM-16树枝状大分子的比较伏安研究

八(3-氨基丙基)十八碳倍半硅氧烷和DAB-AM-16树枝状大分子由于其特定的化学和物理特性,在科学的各个领域得到了广泛的应用。由于它们的末端具有大量NH 2反应性基团,因此它们能够与不同的物质相互作用,从而生成具有巨大分析潜力的不同化合物,这些化合物可用于电催化测定和氧化某些环境和环境物质。生物兴趣。在这项工作中,经过严格的伏安研究后,化学Ni 2+的电分析势测试了用八(3-氨基丙基)十八碳倍半硅氧烷和DAB-AM-16树枝状大分子改性的金属离子螯合硅胶表面的双嘧啶检测。两种材料(20%w / w)的石墨糊电极的循环伏安图均显示了两次氧化还原过程。两种材料的下列形式势(Eθ ')值相同:(Eθ 'I  = 0.26 V; (Eθ 'II  = 0.51 V vs Ag / AgCl(KCl = 1.0 mol L -1 ; v  = 20 mV s -1)。对于双嘧啶检测试验,检测限为9.17×10 -5  mol L -1,安培灵敏度为15.78 mA / mol L-1的相对标准偏差为±3%(n  = 3)和4.79×10 -4  mol L -1,安培灵敏度为11.10 mA / mol L -1,相对标准偏差为±2%(n  = 3)分别用八(3-氨基丙基)八聚倍半硅氧烷和DAB-AM-16树状大分子改性的硅胶表面。

更新日期:2020-05-08
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