scholarly journals Liquid Chromatographic Method for the Analysis of Brimonidine in Ophthalmic Formulations

2012 ◽  
Vol 9 (3) ◽  
pp. 1327-1331 ◽  
Author(s):  
A. Narendra ◽  
D. Deepika ◽  
M. Mathrusri Annapurna
Keyword(s):  
Limit Of Detection ◽  
Detector Response ◽  
Eye Drops ◽  
Reverse Phase ◽  
Limit Of Quantification ◽  
Ich Guidelines ◽  
Acid Sodium Salt ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic

A reverse phase LC method was developed for the determination of Brimonidine in eye drops. Chromatography was carried on an Inertsil ODS 3V column (C18) using a mixture of Octane 1- sulfonic acid sodium salt (0.02M) (pH 3.5 ± 0.05) and acetonitrile (64:36 v/v) as mobile phase at a flow rate of 1 mL/min with UV detection at 254 nm. The drug was eluted at 4.636 min. The detector response was linear in the concentration range of 0.4–72 μg/mL. The limit of detection and limit of quantification were found to be 0.0561 and 0.1848 μg/mL respectively. The proposed method was validated as per the ICH guidelines and can be applied for the routine analysis of Brimonidine in eye drops.

scholarly journals Validated method for estimation of irbesartan in bulk and dosage form by high performance liquid chromatography technique

2015 ◽  
Vol 3 (03) ◽  
pp. 44-49
Author(s):  
N. S. Kulkarni ◽  
D. S. Rathor ◽  
N. S. Ranpise ◽  
S. N. Dhole
Keyword(s):  
High Performance ◽  
Dosage Form ◽  
Limit Of Detection ◽  
High Performance Liquid Chromatographic ◽  
Limit Of Quantification ◽  
Ich Guidelines ◽  
Liquid Chromatographic Method ◽  
Precision Limit ◽  
Liquid Chromatographic

A simple, specific, accurate and precise new high performance liquid chromatographic method was developed for the estimation of irbesartan in bulk and its developed dosage form. The mobile phase containing acetonitrile: Phosphate buffer pH 3.5 in proportion of 50:50 v/v was employed with flow rate of1.0 ml/min and eluting medium was monitored at 240 nm. The method was validated for linearity, accuracy, precision, limit of detection, limit of quantification and robustness for irbesartan. A linear response was observed in the range of 5- 40μg/ml. Linear regression of absorbance on concentration gave equation y = 101.9x + 195.3 with a regression co-efficient r2 =0.993. The method was validated for different parameters as per the ICH guidelines. The degradation studies were carried out by using the developed method. Thus the method was found to be useful for the determination of irbesartan in bulk as well as for dosage forms.

scholarly journals Validated LC Method for the Estimation of Dorzolamide HCl (Carbonic Anhydrase Inhibitor) in Ophthalmic Solutions

2012 ◽  
Vol 9 (3) ◽  
pp. 1238-1243 ◽  
Author(s):  
A. Narendra ◽  
D. Deepika ◽  
M. Mathrusri Annapurna
Keyword(s):  
Limit Of Detection ◽  
Hplc Method ◽  
Detector Response ◽  
Eye Drops ◽  
Reverse Phase Hplc ◽  
Limit Of Quantification ◽  
Ich Guidelines ◽  
Ophthalmic Solutions ◽  
Isocratic Mode

A reverse phase HPLC method is described for the determination of Dorzolamide in eye drops. Chromatography was carried on an Inertsil ODS 3V column using Acetonitrile : (0.02M) 1,Octane Sulphonic acid buffer (pH 3.5) (36:64 v/v) on isocratic mode at a flow rate of 1 mL/min with UV detection at 254 nm. The detector response was linear in the concentration range 4-720 µg/mL. The limit of detection and limit of quantification are found to be 0.7041 and 2.3483 µg/mL respectively. The method was validated as per the ICH guidelines. The proposed method is rapid, accurate and precise and can be applied for the routine analysis of dorzolamide in ophthalimic solutions.

Liquid Chromatographic Determination of Benzoyl Peroxide in Acne Preparations

1984 ◽  
Vol 67 (5) ◽  
pp. 913-915
Author(s):  
Chih-Kuang Chou ◽  
David C Locke
Keyword(s):  
Benzoyl Peroxide ◽  
Limit Of Detection ◽  
Chromatographic Determination ◽  
Detector Response ◽  
Electrochemical Detector ◽  
Reverse Phase ◽  
Order Of Magnitude ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A rapid, precise, and accurate liquid chromatographic (LC) method is described for the determination of benzoyl peroxide (BP) in acne preparations. BP is extracted from a water dispersion of the preparation with dichloromethane (DCM), and an aliquot is eluted from a C-18 reverse phase LC column with acetonitrile-O.lOM aqueous NaCI04. Selective and sensitive quantitation is accomplished with a reductive mode electrochemical detector. This detector is an order of magnitude more sensitive than a 240 nm UV absorption detector; the lower limit of detection is 2 ng for a 4 μL injection. The recovery of BP is 99.4% and the detector response is linear to at least 2 μg per 4 μL injection.

Determination of Gentamicin Sulf ate C1a, C2, and C1 Components by Ion Pair Liquid Chromatography with Electrochemical Detection

1983 ◽  
Vol 66 (1) ◽  
pp. 172-175
Author(s):  
Timothy A Getek ◽  
A Carol Haneke ◽  
George B Selzer
Keyword(s):  
Solvent System ◽  
Ion Pair ◽  
Reverse Phase ◽  
Gentamicin Sulfate ◽  
Acid Sodium Salt ◽  
Liquid Chromatographic Method ◽  
Analytical Response ◽  
Peak Areas ◽  
Liquid Chromatographic

Abstract The 3 major components of gentamicin sulfate (C1a, C2, and C1) were separated by a liquid chromatographic method using a reverse phase C18 bonded silica gel column and an aqueous ion pair solvent system consisting of 0.015M pentanesulfonic acid sodium salt, 0.2M sodium sulfate, and 0.1% acetic acid. Individual C components as well as several unknown minor constituents were detected by an electrochemical flow cell with a glassy carbon working electrode set at a potential of +1.3 ± 0.1 V vs Ag/Agd. The analytical response was linear over a concentration range of 16-30 μg. A plot of peak areas vs concentration of C fractions yielded a correlation coefficient of 0.999 or better for the Cla, C2, and C1 components of gentamicin sulfate.

Liquid Chromatographic Determination of Propranolol Hydrochloride in Various Dosage Forms

1988 ◽  
Vol 71 (4) ◽  
pp. 761-763
Author(s):  
Carolyn S Olsen ◽  
Henry S Scroggins
Keyword(s):  
Pharmaceutical Preparations ◽  
Chromatographic Determination ◽  
Dosage Forms ◽  
Detector Response ◽  
Propranolol Hydrochloride ◽  
Reverse Phase ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A simple and rapid liquid chromatographic method is described for the determination of propranolol hydrochloride in pharmaceutical preparations. The separation was achieved on a reverse-phase octylsilane (C8) column by using a mobile phase composed of a mixture of 0.5 g dodecyl sodium sulfate in 18 mL (0.15 M) H3P04 plus 90 mL methanol, 90 mL acetonitrile, and 52 mL water. Detector response was linear for 0.03-3.1 mg/mL of propranolol. Recoveries from synthetic mixtures ranged from 99.6 to 101.7%. The results obtained by the proposed method were similar to those obtained by the USP XXI method.

High Pressure Liquid Chromatographic Determination of Allantoin in Cosmetic Creams and Lotions

1982 ◽  
Vol 65 (6) ◽  
pp. 1362-1365
Author(s):  
Kazuo Nakao ◽  
Keiichi Honda ◽  
Tohru Yoneya
Keyword(s):  
High Pressure ◽  
Limit Of Detection ◽  
Chromatographic Determination ◽  
Reverse Phase ◽  
High Pressure Liquid Chromatographic ◽  
Silica Column ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A sensitive high pressure liquid chromatographic method was developed for the determination of allantoin in cosmetic preparations. The procedure consists of simple cleanup of samples, derivatization with p-nitrobenzaldehyde in N,N-dimethylformamide to an ultraviolet labeled derivative, and reverse phase chromatography on an octadecylsilylated silica column. Ultraviolet absorbance was measured at 270 nm. Recovery was greater than 97% for cosmetic samples, and the minimum limit of detection was 10 ng.

scholarly journals High performance liquid chromatographic method for the determination of guaifenesin in pharmaceutical syrups and in environmental samples

2013 ◽  
Vol 10 (3) ◽  
pp. 1014-1022
Author(s):  
Baghdad Science Journal
Keyword(s):  
High Performance ◽  
Chromatographic Method ◽  
Limit Of Detection ◽  
Industrial Effluent ◽  
High Performance Liquid Chromatographic ◽  
Reversed Phase ◽  
Limit Of Quantification ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic

A simple, precise, rapid, and accurate reversed – phase high performance liquid chromatographic method has been developed for the determination of guaifenesin in pure from pharmaceutical formulations.andindustrial effluent. Chromatography was carried out on supelco L7 reversed- phase column (25cm × 4.6mm), 5 microns, using a mixture of methanol –acetonitrile-water: (80: 10 :10 v/v/v) as a mobile phase at a flow rate of 1.0 ml.min-1. Detection was performed at 254nm at ambient temperature. The retention time for guaifenesin was found 2.4 minutes. The calibration curve was linear (r= 0.9998) over a concentration range from 0.08 to 0.8mg/ml. Limit of detection (LOD) and limit of quantification ( LOQ) were found 6µg/ml and 18µg/ml respectively. The method was validated for its linearity, precision and accuracy .The proposed method was successfully applied for the determination of guaifenesin in syrups and industrial effluent samples.

scholarly journals Validation and Application of a Modified RP-HPLC Method for the Quantification of Desloratadine in Pharmaceutical Dosage Forms

1970 ◽  
Vol 5 (1) ◽  
pp. 1-4 ◽  
Author(s):  
BM Mahbubul Alam Razib ◽  
Md. Ashik Ullah ◽  
Mohammad Abdul Kalam Azad ◽  
Rebeka Sultana ◽  
Hasina Yasmin ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Chromatographic Determination ◽  
Dosage Forms ◽  
Hplc Method ◽  
Reverse Phase ◽  
Limit Of Quantification ◽  
Pharmaceutical Dosage Forms ◽  
Rp Hplc ◽  
Acid Sodium Salt

The purpose of the study was to develop a simple, sensitive and rapid RP-HPLC method for the determination of desloratadine in marketed products. Chromatographic determination was performed in a reverse phase C18 column (250 mm × 3.3 mm I.D. , 5?m particle size) using a mixture of acetonitrile ? n-pentane sulphonic acid sodium salt monohydrate, adjusted to pH 3.0± 0.05 with phosphoric acid (60? 40 v/v) as mobile phase and delivered at a flow rate of 1 ml/min. The UV detection was set at 254 nm. The calibration range was from 2.0 to 40 ?g/ml. The method was validated in term of linearity (r2>0.98, RSD= 1.958%), precision (RSD=3.757 %) and accuracy (deviation>2.653%, RSD> 2.203%). The limit of quantification was 2 ?g/ml and the limit of detection was 0.1 ?g/ml. The linear ranges of desloratadine were 20.23 ± 0.368 ?g/ml and 6.545 ± 0.0495 ?g/ml in tablet (potency = 99.175 ± 0.718 %) and syrup (potency = 101.15 ± 1.838 %) respectively. The potency of desloratadine in marketed products was determined by this method with acceptable precision and reproducibility. Keywords: Desloratadine, marketed products, RP-HPLC, development of a method Dhaka Univ. J. Pharm. Sci. Vol.5(1-2) 2006 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

scholarly journals Optimization and validation of an RP-HPLC method for the estimation of 6-mercaptopurine in bulk and pharmaceutical formulations

2014 ◽  
Vol 50 (4) ◽  
pp. 793-797 ◽  
Author(s):  
Vanita Somasekhar
Keyword(s):  
Limit Of Detection ◽  
Pharmaceutical Formulations ◽  
Hplc Method ◽  
Detector Response ◽  
Reverse Phase Hplc ◽  
Reverse Phase ◽  
Limit Of Quantification ◽  
Rp Hplc ◽  
Accuracy And Precision

A reverse phase HPLC method is described for the determination of 6-mercaptopurine in bulk and tablets. Chromatography was carried on a C18 column using a mixture of acetonitrile and 0.05 mol/L sodium acetate buffer (10:90 v/v) as the mobile phase at a flow rate of 1 mL/min-1 with detection at 324 nm. The retention time of the drug was 3.25 min. The detector response was linear in the concentration of 0.01-5 μg/mL. The limit of detection and limit of quantification were 17 and 52 ng/mL respectively. The method was validated by determining its sensitivity, linearity, accuracy and precision. The proposed method is simple, economical, fast, accurate and precise and hence can be applied for routine quality control of mercaptopurine in bulk and tablets.

Determination of Ampicillin in Serum by Using Simple Ultrafiltration Technique and Liquid Chromatographic Analysis

1986 ◽  
Vol 69 (5) ◽  
pp. 757-759
Author(s):  
James E Hutchins ◽  
Krystyna Tyczkowska ◽  
Arthur L Aronson
Keyword(s):  
Molecular Weight ◽  
Limit Of Detection ◽  
Reverse Phase ◽  
Molecular Weight Cutoff ◽  
Coefficients Of Variation ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic Analysis ◽  
Liquid Chromatographic ◽  
Serum Components

Abstract A new liquid chromatographic method for determination of ampicillin in canine and equine serum has been developed. The serum sample (500 μL) is vortex-mixed with 20% ethanol (500 μL) and filtered using a 30 000 molecular weight cutoff microseparation tube to separate high molecular weight solutes following low-speed centrifugation. Ampicillin is then separated from other serum components by reverse phase ion-pair liquid chromatography (LC). The ultraviolet (UV) absorbance of the column effluent is monitored at 230 nm. Recoveries of ampicillin from canine serum spiked at concentrations of 10, 40, and 60 μg/mL were 93.1,100.9, and 87.8%, respectively, with coefficients of variation (CVs) of 2.91, 3.08, and 4.08%, respectively. Recoveries of ampicillin from equine serum spiked at the same concentrations were 91.6, 90.1, and 88.7%, respectively, with CVs of 3.03, 2.61, and 3.35%, respectively. The limit of detection for ampicillin by this method is less than 0.5 μg/mL serum.

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