Liquid chromatographic method for the determination of cyanazine in the presence of some normal soil constituents

Background: Atenolol is a selective beta 1 blocker that can be used alone or in combination with hydrochlorothiazide or with chlorthalidone for the treatment of hypertension and prevention from a heart attack. Objective: The main target of this work was to improve modern, easy, accurate and selective liquid chromatographic method (RP-HPLC) for the determination of these drugs in the presence of their degradation products. These methods can be used as analytical gadgets in quality control laboratories for a routine examination. Methods: In this method, the separation was accomplished through an Inertsil® ODS-3V C18 column (250 mm x 4.6 mm, 5 μm), the mobile phase used was 25 mM aqueous potassium dihydrogen orthophosphate solution adjusted to pH 6.8 by using 0.1M sodium hydroxide and acetonitrile (77 : 23, v/v), the flow rate used was 1 ml/min and detection was achieved at 235 nm using UV. Results: All peaks were sharp and well separated, the retention times were atenolol degradation (ATN Deg.) 2.311 min, atenolol (ATN) 2.580 min, hydrochlorothiazide degradation (HCT Deg.) 5.890 min, hydrochlorothiazide (HCT) 7.016 min, chlorthalidone degradation CTD Deg 8.018 min and chlorthalidone (CTD) 14.972 min. Linearity was obtained and the range of concentrations was 20- 160 μg/ml for atenolol, 10-80 μg/ml for hydrochlorothiazide and 10-80 μg/ml for chlorthalidone. According to ICH guidelines, method validation was accomplished, these methods include linearity, accuracy, selectivity, precision and robustness. Conclusion: The optimized method demonstrated to be specific, robust and accurate for the quality control of the cited drugs in pharmaceutical dosage forms.

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A Green Liquid Chromatographic Method For The Simultaneous Determination of Chlorpheniramine Maleate, Pseudoephedrine Hydrochloride and Propyphenazone

Current Analytical Chemistry ◽

10.2174/1573411014666180806155002 ◽

2019 ◽

Vol 15 (6) ◽

pp. 635-641

Author(s):

Nadia M. Mostafa ◽

Ghada M. Elsayed ◽

Nagiba Y. Hassan ◽

Dina A. El Mously

Keyword(s):

Simultaneous Determination ◽

Mobile Phase ◽

Dosage Form ◽

Chromatographic Method ◽

Green Analytical Chemistry ◽

Chlorpheniramine Maleate ◽

Accuracy And Precision ◽

Liquid Chromatographic Method ◽

Liquid Chromatographic

Background:The concept of green analytical chemistry prevails due to the growing environmental pollution.Objective:Our attempts are to develop simple and eco-friendly method which is non-harmful to the environment by producing minimal waste. In this context, a green liquid chromatographic method was applied for the simultaneous determination of chlorpheniramine maleate, pseudoephedrine hydrochloride and propyphenazone in their combined dosage form.Methods:Separation was carried out using X select HSS RP C18 analytical column (250 × 4.6 mm, 5μm) using methanol - 0.02 M phosphate buffer pH 3 - triethylamine (60:40: 0.1, by volume) as a mobile phase. The separated peaks were detected at 215 nm at a flow rate 1.0 mL/min.Results:Quantification was done over the concentration ranges of 1-25 µg/mL for chlorpheniramine maleate, 5-35 µg/mL for pseudoephedrine hydrochloride and 10-120 µg/mL for propyphenazone. The suggested method was validated with regard to linearity, accuracy and precision according to the International Conference on Harmonization guidelines with good results.Conclusion:It could be used as a safer alternative for routine analysis of the mentioned drugs in quality control laboratories.

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Microemulsion liquid chromatographic method for simultaneous separation and determination of five isoflavones in red clover

Journal of Liquid Chromatography &amp Related Technologies ◽

10.1080/10826076.2020.1866599 ◽

2021 ◽

pp. 1-8

Author(s):

Tianjiao Duan ◽

Haixia Ma ◽

Yuming Dong ◽

Fatang Yang ◽

Xiaofeng Liu

Keyword(s):

Chromatographic Method ◽

Red Clover ◽

Liquid Chromatographic Method ◽

Simultaneous Separation ◽

Liquid Chromatographic

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Liquid Chromatographic Method for Determination of Piperine in Piper nigrum (Black and White Pepper)

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/71.1.53 ◽

1988 ◽

Vol 71 (1) ◽

pp. 53-55 ◽

Cited By ~ 1

Author(s):

Kenneth M Weaver ◽

Michael E Neale ◽

Ann Laneville

Keyword(s):

Chromatographic Method ◽

Piper Nigrum ◽

Chromatographic System ◽

Reverse Phase ◽

White Pepper ◽

Black And White ◽

Liquid Chromatographic Method ◽

Phase Liquid ◽

Liquid Chromatographic

Abstract A method was developed for the detection and quantitation of piperine in Piper nigrum. A reverse-phase liquid chromatographic system equipped with a C18 column with detection at 340 nm was used. A rapid 1 h acetone extraction followed by solvent dilution was used to avoid sample cleanup. The detection limit is 3 ng injected piperine, with 97.5-100.5% recovery of added piperine.

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