Bedor, D.C., Gonçalves, T.M., Ferreira, M.L., de Sousa, C.E., Menezes, A.L., Oliveira, E.J. and de Santana, D.P. (2008) Simultaneous Determination of Sulfamethoxazole and Trimethoprim in Biological Fluids for High-Throughput Analysis: Comparison of HPLC with Ultraviolet and Tandem Mass Spectrometric Detection. Journal Chromatography B: Analytical Technology Biomedical Life Science, 863, 46-54.
https://doi.org/10.1016/j.jchromb.2007.12.027

has been cited by the following article:

• TITLE: A Reliable Method to Quantify Trimethoprim and Sulfamethoxazole in Plasma of Children by HPLC with Application in Pharmacokinetic Studies

  AUTHORS: Alejandra Toledo López, Hugo Juárez Olguín, Ismael Lares-Asseff, Fernanda Reyes González, Radames Alemon Medina, Gabriela Pérez Guillé, Francisca Trujillo Jimenez

  KEYWORDS: Children, Liquid Chromatography, Phase Reverse, Pharmacokinetics

  JOURNAL NAME: American Journal of Analytical Chemistry, Vol.10 No.7, July 4, 2019

  ABSTRACT: Aim: To develop a simple and sensitive high-performance liquid chromatography method to determine plasmatic levels of trimethoprim/sulfamethoxazole in paediatric population. Method: Chromatographic separation was carried out using a reverse phase column with detection ultraviolet at a wavelength of 225 nm. The mobile phase consists of phosphate buffer 0.1 M, acetonitrile and methanol, (65:20:15) with a flow of 1.0 ml/min. Results: Calibration curve was linear over the concentration range for trimethoprim of 0.25 to 5 μg/ml and 5 to 100 μg/ml for sulfamethoxazole. Precision were found to be within 15% for both compounds. The detection limits and quantifications for trimethoprim/sulfamethoxazole were 0.2 - 0.25 μg/ml and 3 - 5 μg/ml respectively. Conclusions: The developed method was applied for the quantification of both compounds in plasma samples of two patients resulting concentrations within the therapeutic ranges. The method is convenient for pharmacokinetic studies.