Dergiler / Turkish Journal of Pharmaceutical Sciences / 2008 / Cilt: 5 - Sayı: 2
Quantitative determination of hydrochlorothiazide and spironolactone in tablets by spectrophotometric and HPLC methots
- Sayfa
- 53–66
- DOI
- —
Özet
Bu çalısmada hidroklortiyazid (HCT) - spironolakton (SPL) in tabletlerde kantitatif tayin için basit, duyarlı ve güvenilir spektrofotometrik yöntemler tarafımızdan geliştirilen yüksek basınlı sıvı kromotografisi (YBSK) yöntemi He karsilaştinlmistır. Absorbans oranlan yönteminde isobestik nokta olarak 260 nm segilmiştir. Vierordt yönteminde ise her iki etken madde nin de 242 ve 269 nm ’lerdeki A/ değerleri hesaplanmistır. Her iki yöntem de HCT ve SPL igin doğrusal konsatrasyon aralıgi sırası He 2- 15 fig/mL ve 2-12 fig//mL olarak bulunmuştur. BagH standart sapma değerleri absorbans oranlan ve Vierordt yönteminde sırası He HCT igin % 1.58 ve % 1.32, SPL igin % 1.26 ve % 1.52 olarak bulunmuştur. YBSK yönteminde HCT, SPL ve Mefrusid (MFS, internal standart), Luna 18 kolonu üzerinde isokratik olarak su-metanol-fosfat tamponu (pH: 3 ± 0,1) (71:25:4 v/v/v) hareketli faz sisteminde tayin edilmiştir. Doğrusal konsantrasyon arahgi HCT ve SPL igin sırası He 5-25 fig/mL ve 2-15 fig/mL olarak saptanmistır. BagH standart sapma değerleri HCT ve SPL igin sırası He % 1.39 ve % 1.44 olarak hesaplanmistır. Sonug olarak önerilen iki farklı spektroskopik ve YBSK yöntemi HCT-SPL igeren tabletlerin rutin kantitatif analizlerinde kullnılabilir olduğu gösterilmiştir.
Abstract
In this study, simple, sensitive and reliable spectroscopic methods (absorbance ratio and Vierordt) were compared with HPLC method developed for quantitative determination of spironolactone (SPL) and hydrochlorothiazide (HCT) in commercial tablets. 260 nm was chosen as the isosbestic point in the absorbance ratio method. For Vierordt method; A/ values were calculated at 242 and 269 nm for both substances and used for quantitative analysis of HCT and SPL in its binary mixture. Linearity ranges for HCT and SPL was 2-15 jUg/mL an 2-12 jUg/mL respectively for both methods. The relative standard deviations for absorbance ratio an Vierordt-methods were found to be 1.58 % and 1.32 % for HCT, 1.26 % and 1.52 % for SPL respectively In HPLC method, HCT, SPL and Mefrusid (MFS) as an internal standard were determined by isocratic system using water-methanol-phosphate buffer (pH 3.0 ± 0.1) (71:25:4 v/v/v) as mobile phase and with Luna.C18 column. Linear concentration range was 5-25 jUg/mL, 2-15 jUg/mL for HCT and S respectively, and the relative standard deviations were found to be 1.39 % for HCT and 1.44 % for SPL respectively. Therefore, it is concluded that two spectroscopic methods and HPLC method can be used in routine simultaneous quantitative analyses of HCT-SPL in commercial tablets.