Comparison of HPLC, UV spectrophotometry and potentiometric titration methods for the determination of lumefantrine in pharmaceutical products.
This paper describes the development and evaluation of a HPLC, UV spectrophotometry and potentiometric titration methods to quantify lumefantrine in raw materials and tablets. HPLC analyses were carried out using a Symmetry C(18) column and a mobile phase composed of methanol and 0.05% trifluoroacetic acid (80:20), with a flow rate of 1.0ml/min and UV detection at 335nm. For the spectrophotometric analyses, methanol was used as solvent and the wavelength of 335nm was selected for the detection. Non-aqueous titration of lumefantrine was carried out using perchloric acid as titrant and glacial acetic acid/acetic anhydride as solvent. The end point was potentiometrically determined. The three evaluated methods showed to be adequate to quantify lumefantrine in raw materials, while HPLC and UV methods presented the most reliable results for the analyses of tablets.
Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil. isaccesar@bol.com.br
Isabela
I
da Costa César
Fernando Henrique Andrade
FH
Nogueira
Gérson Antônio
GA
Pianetti
D000962:Antimalarials / Q000032:analysis* / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004983:Ethanolamines / Q000032:analysis* / Q000737:chemistry; D005449:Fluorenes / Q000032:analysis* / Q000737:chemistry; D000078102:Lumefantrine; D015394:Molecular Structure; D004364:Pharmaceutical Preparations / Q000032:analysis* / Q000737:chemistry; D012015:Reference Standards; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D013607:Tablets; D013997:Time Factors; D017186:Titrimetry / Q000379:methods*
D000962:Antimalarials; D004983:Ethanolamines; D005449:Fluorenes; D004364:Pharmaceutical Preparations; D013607:Tablets; D000078102:Lumefantrine