title: Straightforward and rapid determination of sulfadoxine and sulfamethoxazole in capillary blood on sampling paper with liquid chromatography and UV detection.
abstract: A method for the determination of sulfadoxine and sulfamethoxazole in capillary blood on sampling paper has been developed and validated. The method is straightforward with minimal sample preparation, and is suitable for rural settings. Separation of sulfadoxine, sulfamethoxazole and internal standard was performed using a Purospher STAR RP-18 endcapped LC column (150x4.6mm) with a mobile phase consisting of acetonitrile:sodium acetate buffer pH 5.2, I=0.1 (1:2, v/v). For sulfadoxine, the within-day precision was 5.3% at 15micromol/l and 3.7% at 600micromol/l, while for sulfamethoxazole it was 5.7% at 15micromol/l and 3.8% at 600micromol/l. The lower limit of quantification was determined to 5micromol/l and precision was 5.5% and 5.0% for sulfadoxine and sulfamethoxazole, respectively.
authors.affiliation: Dalarna University College, SE-781 88 Borlänge, Sweden.
authors.forename: J
authors.initials: J
authors.lastname: Lindkvist
authors.forename: M
authors.initials: M
authors.lastname: Malm
authors.forename: Y
authors.initials: Y
authors.lastname: Bergqvist
mesh_terms: D000962:Antimalarials / Q000097:blood* / Q000737:chemistry; D001800:Blood Specimen Collection / Q000379:methods; D002675:Child, Preschool; D002853:Chromatography, Liquid / Q000379:methods*; D006266:Health Education / Q000379:methods; D006801:Humans; D007223:Infant; D008288:Malaria / Q000097:blood* / Q000188:drug therapy; D010209:Paper; D011014:Pneumonia / Q000175:diagnosis*; D012015:Reference Standards; D012044:Regression Analysis; D012423:Rural Health; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013413:Sulfadoxine / Q000097:blood* / Q000737:chemistry; D013420:Sulfamethoxazole / Q000097:blood* / Q000737:chemistry
chemical_list: D000962:Antimalarials; D013413:Sulfadoxine; D013420:Sulfamethoxazole