scholarly journals Pharmacokinetic comparisons of S-oxiracetam and R-oxiracetam in beagle dogs

2016 ◽  
Vol 66 (2) ◽  
pp. 279-287 ◽  
Author(s):  
Wusan Wang ◽  
Hui Ji ◽  
Tingting Li ◽  
Yuanwei Jia ◽  
Haitang Xie
Keyword(s):  
High Performance ◽  
Conformational Stability ◽  
High Performance Liquid Chromatographic ◽  
Hplc Method ◽  
Stability Study ◽  
Normal Phase ◽  
Pharmacokinetic Analysis ◽  
Beagle Dogs ◽  
Random Crossover ◽  
Liquid Chromatographic

Abstract A pharmacokinetic comparison and conformational stability study of S-oxiracetam (S-ORT) and R-oxiracetam (R-ORT) in beagle dogs was used to investigate the possible mechanism of different effects of two oxiracetam enantiomers through a random crossover design. After drug administration to beagle dogs, blood samples were collected at different time points for pharmacokinetic analysis using the UPLC-ESI-MS/MS method. Parts of plasma samples were used for conformation transformation studies using a normal phase high performance liquid chromatographic (NP HPLC) method. The study showed that oxiracetam enantiomers maintained their original conformation when administered orally to beagle dogs. Concentrations of S-ORT were significantly higher than R-ORT 1.5 and 2 h after administration; the AUC0-∞ of S-ORT after oral administration tended to be higher than that of R-ORT, which showed that the different effects between S-ORT and R-ORT may be partly associated with their distinctive absorption at least.

scholarly journals A Simple and Sensitive HPLC Method for Simultaneous Analysis of Nabumetone and Paracetamol in Pharmaceutical Formulations

2011 ◽  
Vol 8 (s1) ◽  
pp. S41-S46
Author(s):  
Prafulla Kumar Sahu ◽  
M. Mathrusri Annapurna ◽  
Dillipkumar Sahoo
Keyword(s):  
High Performance ◽  
Internal Standard ◽  
Pharmaceutical Formulations ◽  
High Performance Liquid Chromatographic ◽  
Hplc Method ◽  
Simultaneous Estimation ◽  
Aqueous Acetic Acid ◽  
Linear Calibration ◽  
Acceptance Range ◽  
Liquid Chromatographic

This paper describes a high-performance liquid chromatographic method for simultaneous estimation of nabumetone and paracetamol in binary mixture. The method was based on RP-HPLC separation and quantitation of the two drugs on hypersil C-18 column (250 mm × 4.6 mm) using a mobile phase consisting of acetonitrile and 0.05% aqueous acetic acid (70:30v/v) at flow rate of 1 mL min-1. Quantitation was achieved with PDA detector at 238 nm based on peak area with linear calibration curves at concentration ranges 5-25 µg mL-1for both the drugs. Naproxen sodium was used as internal standard. The method has been successively applied to pharmaceutical formulation. No chromatographic interference from the tablet excipients was found. The method was validated in terms of precision, robustness, recovery and limits of detection and quantitation. The intra and inter-day precision and accuracy values were in the acceptance range as per ICH guidelines.

RP-HPLC METHOD FOR ESTIMATION OF LORNOXICAM IN TABLETS AND IN DISSOLUTION SAMPLES USING MASS SPECTROMETRIC COMPATIBLE BUFFERS

INDIAN DRUGS ◽  
2021 ◽  
Vol 58 (07) ◽  
pp. 32-37
Author(s):  
Vijaya Lakshmi Marella ◽  
Chaitanya S. N ◽  
Keyword(s):  
High Performance ◽  
Limit Of Detection ◽  
High Performance Liquid Chromatographic ◽  
Hplc Method ◽  
Mass Spectrometric ◽  
Control Analysis ◽  
Limit Of Quantification ◽  
Pharmaceutical Dosage Forms ◽  
Ich Guidelines ◽  
Liquid Chromatographic

A selective and sensitive reverse phase High Performance Liquid Chromatographic method has been developed and validated for the estimation of lornoxicam in bulk, pharmaceutical dosage forms and in dissolution samples. The analysis was performed isocratically on an Inertsil column (250* 4.6 mm, 5 µm) using a mass spectrometric compatible mobile phase of 10 mM ammonium acetate: acetonitrile (50:50 V/V) at a flow rate of 1 mL/min.The detection wavelength was 290 nm. The retention time was found to be 4.573 min for lornoxicam. The linearity of the method has been satisfied with Beer Lambert’s law in the concentration range of 5-25 µg/mL with a correlation coefficient of 0.9988. The mean recoveries assessed for lornoxicam were in the range of 100.39-101.86 %, indicating good accuracy of the method. The limit of detection and limit of quantification were found to be 0.03 and 0.11 µg/mL, respectively. The developed method has been statistically validated in accordance with ICH guidelines and found to be mass spectrometric compatible, simple, precise, and accurate with the prescribed values. Thus, the proposed method was successfully applied for the estimation of lornoxicam in routine quality control analysis of bulk, formulations and in dissolution samples.

DEVELOPMENT OF VALIDATED RP-HPLC METHOD FOR THE QUANTITATIVE ANALYSIS OF CHROMIUM PICOLINATE III IN A DIET VINEGAR FORMULATION

INDIAN DRUGS ◽  
2013 ◽  
Vol 50 (05) ◽  
pp. 48-52
Author(s):  
A Lodhi ◽  
◽  
A Jain ◽  
B. Biswal
Keyword(s):  
High Performance ◽  
Limit Of Detection ◽  
High Performance Liquid Chromatographic ◽  
Reversed Phase ◽  
Hplc Method ◽  
Chromium Picolinate ◽  
Limit Of Quantification ◽  
Pharmaceutical Dosage Forms ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic

A validated high performance liquid chromatographic method was developed for the determination of chromium picolinate in pharmaceutical dosage forms. The analysis was performed at room temperature using a reversed-phase ODS, 5µm (250×4.6) mm column. The mobile phase consisted of acetonitrile: buffer (60:40 V/V) at a flow rate of 0.5 mL/min. The PDA-detector was set at 264 nm. The developed method showed a good linear relationship in the concentration range from 1.5 – 12.5 µg/mL with a correlation coefficient from 0.999. The limit of detection and limit of quantification were 0.0540513 and 0.1637919 µg/mL respectively.

scholarly journals Determination of Dyclonine Hydrochloride by a HPLC Method and Camphor and Menthol by a GC Method in Compound Lotion

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Suying Ma ◽  
Haixia Lv ◽  
Xiaojun Shang
Keyword(s):  
Retention Time ◽  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Reversed Phase ◽  
Hplc Method ◽  
Ionization Detector ◽  
Uv Detector ◽  
Flame Ionization ◽  
Liquid Chromatographic

A high performance liquid chromatographic (HPLC) method with UV detector for the determination of dyclonine hydrochloride and a gas chromatography (GC) method with flame ionization detector (FID) for the determination of camphor and menthol in lotion were developed. The developed HPLC method involved using a SinoChoom ODS-BP C18reversed-phase column (5 μm, 4.6 mm × 200 mm) and mobile phase consisting of acetonitrile : water : triethylamine in a ratio of 45 : 55 : 1.0; pH was adjusted to 3.5 with glacial acetic acid. The developed GC method for determination of camphor and menthol involved using an Agilent 19091J-413 capillary chromatographic column (30 m × 320 μm × 0.25 μm). The two methods were validated according to official compendia guidelines. The calibration of dyclonine hydrochloride for HPLC method was linear over the range of 20–200 μg/mL. The retention time was found at 6.0 min for dyclonine hydrochloride. The calibration of camphor and menthol of GC method was linear over the range of 10–2000 μg/mL. The retention time was found at 2.9 min for camphor and 3.05 min for menthol. The proposed HPLC and GC methods were proved to be suitable for the determination of dyclonine hydrochloride, camphor, and menthol in lotion.

scholarly journals Validated high performance liquid chromatographic (HPLC) method for analysis of zerumbone in plasma

2010 ◽  
Vol 9 (8) ◽  
pp. 1260-1265 ◽  
Author(s):  
Elamin M Eid Eltayeb ◽  
Bustamam Abdul Ahmad ◽  
S Al Zubairi Adel ◽  
Aspollah Sukari Mohamed ◽  
Abdullah Rasedee
Keyword(s):  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Hplc Method ◽  
Liquid Chromatographic

Comparison of a Commercial Enzymic Kit for Urinary Oxalate Analysis with a High Performance Liquid Chromatographic Method

1993 ◽  
Vol 30 (2) ◽  
pp. 186-190 ◽  
Author(s):  
Bryan J Starkey ◽  
Ian D R Fry
Keyword(s):  
High Performance ◽  
Chromatographic Method ◽  
High Performance Liquid Chromatographic ◽  
Hplc Method ◽  
Urinary Calcium ◽  
Urinary Oxalate ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic ◽  
Significant Interference ◽  
Better Than

A new commercial enzymic kit for urinary oxalate determination has been adapted for use on a centrifugal analyser. It has been evaluated and compared with an established high performance liquid chromatographic (HPLC) procedure developed in our laboratory. Mean recovery of oxalate from urine samples augmented with oxalic acid exceeded 97% by both methods. The precision of the HPLC method was superior to that of the enzymic kit but both methods gave between batch precision values better than CV 12% at low (less than 100μmol/L) oxalate concentrations and better than CV 7% at higher concentrations (greater than 270μmol/L) Urinary oxalate values obtained with the new enzymic procedure correlated more closely with HPLC values ( r = 0·84) than did values previously obtained using the forerunner of the kit ( r = 0·62) which was known to be susceptible to ascorbate interference. No significant interference from ascorbic acid or from high urinary calcium concentrations could be demonstrated using either the improved kit or the HPLC procedure. Its easy adaptation to automated analysers available in most laboratories, coupled to its acceptable analytical performance render the enzymic kit a reasonable alternative to HPLC or other more complex procedures for urinary oxalate analysis.

REVERSE PHASE HIGH PERFORMANCE LIQUID CHROMATOGRAPHIC METHOD FOR DETERMINATION OF REGORAFENIB IN TABLET DOSAGE FORM

INDIAN DRUGS ◽  
2018 ◽  
Vol 55 (06) ◽  
pp. 63-68
Author(s):  
R. Raut ◽  
◽  
A. Patil ◽  
V. K Munipalli ◽  
M. Patel ◽  
...  
Keyword(s):  
High Performance ◽  
Dosage Form ◽  
High Performance Liquid Chromatographic ◽  
Hplc Method ◽  
Control Analysis ◽  
Reverse Phase ◽  
Ich Guidelines ◽  
Tablet Dosage ◽  
Liquid Chromatographic

A simple precise and rapid Reverse Phase High Performance Liquid Chromatographic (RP-HPLC) method has been developed for quantitative determination of Regorafenib in tablet dosage form. In this method Hypersil Gold (C18, 150mm× 4.6mm id, 3μ) column with mobile phase consisting of Trifluoroacetic acid (0.2% v/v) and Acetonitrile in the ratio of (50: 50 v/v) at 400C in an isocratic mode was used. The detection was carried out at 260 nm and 20μL injection volume was selected with the flow rate 1mL/min. The linearity range of Regorafenib shows concentration between 5-200 μg/mL. The regression coefficient obtained was 0.999. Retention time of Regorafenib was found to be 6.49 minutes. Acetonitrile and Water in the ratio of (3:1) was used as a diluent. The method was validated as per ICH guidelines and is simple, fast, accurate, precise and can be applied for routine quality control analysis of Regorafenib in tablet dosage form.

DEVELOPMENT AND VALIDATION OF A NEW RP HPLC METHOD FOR ROUTINE DETERMINATION OF TEA TREE OIL IN BULK AND COSMECEUTICAL FORMULATIONS

INDIAN DRUGS ◽  
2019 ◽  
Vol 56 (07) ◽  
pp. 43-49
Author(s):  
B.P. Manjula ◽  
V. G Joshi ◽  
Siddamsetty Ramachandra Setty ◽  
M Geetha ◽  
Keyword(s):  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Reversed Phase ◽  
Hplc Method ◽  
Tea Tree Oil ◽  
Tea Tree ◽  
Liquid Chromatographic Method ◽  
Development And Validation ◽  
Liquid Chromatographic

Tea tree oil, an active ingredient of skin, hair and nail care cosmeceuticals, has claims for topical antimicrobial, analgesic and anti-inflammatory activity. Its complex composition is governed by ISO 4730:2017. Terpinene-4-ol is the principal constituent of the oil (35% - 48%) followed by γ-terpinene (14% -28%), α-terpinene (6%-12%) and 1,8-cineole (≤15%). A reversed-phase, isocratic high performance liquid chromatographic method has been developed and validated for routine determination of tea tree oil based on1,8-cineole content in bulk and commercially available cosmeceuticals using C18 column, methanol-water (70:30 v/v) as mobile phase and flow rate of 1mL/min. UV detection was done at 200 nm. Linearity of the method was established for 20-100μL/mL (R2 = 0.9992) with LOD, LOQ values of 0.5594 μL/mL and 5.5941μL/mL respectively. The % RSD values for robustness and precision were <1% and recovery ranged between 99.09-102.96%. The method was successfully applied for determination of 1,8-cineole content in cosmeceuticals.

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