title: Simultaneous analysis of 17 diuretics in dietary supplements by HPLC and LC-MS/MS.
abstract: In order to test health foods for illegally added diuretics for weight loss, we developed simple, rapid, selective, and sensitive methods using HPLC and LC-MS/MS for the simultaneous analysis of 17 diuretics in dietary supplements. HPLC conditions were set with a Capcell-pak C18, using a mobile phase consisting of gradient conditions, UV detection at 254 nm and validated for linearity (r(2)> 0.999), precision (CV ≤ 3%), recoveries (90.4-102.8%) and reproducibility. Identification and quantification of 17 diuretics were accomplished by ion-spray LC-MS/MS using multiple reaction monitoring (MRM). The chromatographic separation was carried out under the reversed-phase mechanism on an HSS-T3 column. The LC-MS/MS method was validated for linearity (r(2)> 0.99) and precision (CV < 13%). Sixteen dietary supplements were tested with the developed methods. Diuretics were not detected in all samples. Extraction recovery was also investigated and the extraction recoveries in different formulations were from 88% to 110% and from 81% to 116% using HPLC and LC-MS/MS, respectively. There was no significant difference in recoveries in the type of dietary supplements. Based on this result, the developed methods to monitor illegal drug adulterations in dietary supplements using HPLC and LC-MS/MS are simple, fast and reliable. Therefore, it is applicable to routine drug-adulteration screening.
authors.affiliation: Toxicological Evaluation and Research Department, National Institute of Food and Drug Safety Evaluation, Korea Food & Drug Administration, Osong-eup, Cheongwon-gun, Chungcheongbuk-do, Korea.
authors.forename: H
authors.initials: H
authors.lastname: Woo
authors.forename: J W
authors.initials: JW
authors.lastname: Kim
authors.forename: K M
authors.initials: KM
authors.lastname: Han
authors.forename: J H
authors.initials: JH
authors.lastname: Lee
authors.forename: I S
authors.initials: IS
authors.lastname: Hwang
authors.forename: J H
authors.initials: JH
authors.lastname: Lee
authors.forename: J
authors.initials: J
authors.lastname: Kim
authors.forename: S J
authors.initials: SJ
authors.lastname: Kweon
authors.forename: S
authors.initials: S
authors.lastname: Cho
authors.forename: K R
authors.initials: KR
authors.lastname: Chae
authors.forename: S Y
authors.initials: SY
authors.lastname: Han
authors.forename: J
authors.initials: J
authors.lastname: Kim
mesh_terms: D002851:Chromatography, High Pressure Liquid; D002853:Chromatography, Liquid; D019587:Dietary Supplements / Q000009:adverse effects*; D004232:Diuretics / Q000009:adverse effects / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D056910:Republic of Korea; D053719:Tandem Mass Spectrometry
chemical_list: D004232:Diuretics