title: A new method of analysis of peroxydisulfate using ion chromatography and its application to the simultaneous determination of peroxydisulfate and other common inorganic ions in a peroxydisulfate matrix.
abstract: A new method for the determination of peroxydisulfate using ion chromatography has been developed. Elution of peroxydisulfate was effected by isocratic elution using 200 mM NaOH at 40°C. A modification of the method using gradient elution was able to simultaneously determine other common inorganic ions (nitrate, nitrite, sulfate and chloride) down to significantly low concentrations in a peroxydisulfate matrix. The relative standard deviations (RSD) were in the range of 0.5-5%, for peak areas and <0.2% for peak retention times. The recoveries were between 95% and 120% for a concentration range of about 0.5-42 ppm. The limit of detection for peroxydisulfate ion was 0.2 ppm and for the other ions were ≤2×10(-2) ppm. The calibration curves were linear with slope and intercepts close to 1 and 0, respectively.
authors.affiliation: Department of Chemical and Bioengineering, North Carolina A&T State University, 1601 East Market Street, Greensboro, NC 27411, USA.
authors.forename: Nymul E
authors.initials: NE
authors.lastname: Khan
authors.forename: Yusuf G
authors.initials: YG
authors.lastname: Adewuyi
mesh_terms: D000838:Anions / Q000032:analysis* / Q000737:chemistry; D002852:Chromatography, Ion Exchange / Q000379:methods*; D016014:Linear Models; D010545:Peroxides / Q000032:analysis / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012972:Sodium Hydroxide; D013431:Sulfates / Q000032:analysis / Q000737:chemistry*; D013696:Temperature
chemical_list: D000838:Anions; D010545:Peroxides; D013431:Sulfates; D012972:Sodium Hydroxide