Tetracycline Speciation Study in Aqueous Medium

被引：0

作者：

Gonzalez-Garrido, Luis Diego ^{[1
]}

Guzman-Hernandez, Dafne Sarahia ^{[2
]}

Rojas-Hernandez, Alberto ^{[1
]}

Rodriguez-Barrientos, Damaris ^{[1
]}

Juarez-Gomez, Jorge ^{[1
]}

Ramirez-Silva, Maria Teresa ^{[1
]}

机构：

[1] Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Ave Ferrocarril San Rafael Atlixco 186, Col Vicentina 09310, Mexico

[2] Univ Autonoma Metropolitana Iztapalapa, Dept Quim, CONAHCYT, Ave San Rafael Atlixco 186, Col Vicentina 09340, Mexico

来源：

JOURNAL OF THE MEXICAN CHEMICAL SOCIETY | 2025年 / 69卷 / 01期

关键词：

Tetracycline; stability; acidity constants; speciation; capillary zone electrophoresis; PREDOMINANCE-ZONE DIAGRAMS; ANTIBIOTICS; STABILITY;

D O I：

10.29356/jmcs.v69i1.2293

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Tetracycline is a broad-spectrum antibiotic considered an emerging contaminant with major effects on human health and the ecosystems. Using the techniques of UV absorption spectroscopy and capillary zone electrophoresis, the characterization of tetracycline in aqueous medium is presented. Likewise, four acidity 4+ constants were determined: pKa1 = 3 = (3.277 f 0.067), pKa2 = 2- 3 = (7.397 f 0.055), 2- pKa3 = 2- = (9.349 f 0.039) and pKa4 = 3- 2- = (11.278 f 0.024). Finally, capillary zone electrophoresis corroborates the predominance of five tetracycline species (TcH4+, TcH3, TcH2-, TcH2- and Tc3-) and presents a proposal for the deprotonation mechanism for tetracycline in aqueous medium.

引用

页码：78 / 87

页数：10

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