scholarly journals Determination of Glycarbylamide in Chicken Tissue by High-Performance Liquid Chromatography

1999 ◽  
Vol 82 (2) ◽  
pp. 248-250 ◽  
Author(s):  
Yuzo Yamamoto ◽  
Fusao Kondo
Keyword(s):  
High Performance ◽  
Solid Phase ◽  
Potassium Dihydrogen Phosphate ◽  
High Performance Liquid Chromatographic ◽  
Dihydrogen Phosphate ◽  
Phosphate Solution ◽  
Neutral Alumina ◽  
Potassium Dihydrogen ◽  
Chicken Muscle ◽  
Chicken Tissue

Abstract A high-performance liquid chromatographic (HPLC) method for determining glycarbylamide (GB) in chicken tissue was developed. GB was extracted with acetonitrile, followed by solid-phase extraction cleanup using a Bond Elut cartridge column with neutral alumina. After the extract had been evaporated to dryness, the residue was dissolved in 1.0 mL 0.1 N sodium hydroxide. Then 1.0 mL 0.1 M potassium dihydrogen phosphate solution was added to it. HPLC separation was done on a 250 × 4.6 mm id TSK-GEL ODS 80™TM column with 0.05M potassium dihydrogen phosphate as the mobile phase. Ultraviolet detection was done at a wavelength of 260 nm. The calibration curve of standard GB solutions was linear between 0.16 and 3 μg/mL (correlation coefficient, r = 0.999). The recovery of GB from chicken muscle spiked at 0.8 μg/g was 88.6 ± 2.3% (mean ± standard deviation, n = 5), and the lower limit of determination was 0.05 μg/g in chicken muscle.

Separation and Identification of Nine Penicillins by Reverse Phase Liquid Chromatography

1984 ◽  
Vol 67 (2) ◽  
pp. 228-231
Author(s):  
Gregory T Briguglio ◽  
◽  
Cesar A Lau-Cam
Keyword(s):  
High Performance ◽  
Potassium Dihydrogen Phosphate ◽  
High Performance Liquid Chromatographic ◽  
Penicillin G ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
Liquid Chromatographic Method ◽  
Phase Liquid ◽  
Wavelength Detector ◽  
Liquid Chromatographic

Abstract A simple and rapid high performance liquid chromatographic method was developed for the separation and identification of amoxicillin, ampicillin, cloxacillin, dicloxacillin, methicillin, oxacillin, nafcillin, penicillin G potassium, and penicillin V potassium. The antibiotics were separated at ambient temperature on a Chromegabond 10 μm Cis column with acetonitrile-methanol-O.OlM potassium dihydrogen phosphate buffer, pH 4.7 (19 + 11 + 70), at 1 mL/min. A variable wavelength detector set at 225 nm, 0.16 AUFS, and a recorder set at 0.25 cm/min were used for the detection. Individual antibiotics and their mixtures were dissolved in the mobile phase and injected into the chromatograph through a 20 μL injection loop. Baseline separation was observed for virtually all 9 antibiotics. The entire mixture was resolved in less than 30 min. The method was sensitive, reproducible, and applicable to the qualitative analysis of commercial dosage forms.

scholarly journals Simultaneous Assay of Olanzapine and Fluoxetine in Tablets by Column High-Performance Liquid Chromatography and High-Performance Thin-Layer Chromatography

2007 ◽  
Vol 90 (6) ◽  
pp. 1573-1578 ◽  
Author(s):  
Charmy R Shah ◽  
Nehal J Shah ◽  
Bhanubhai N Suhagia ◽  
Natvarlal M Patel
Keyword(s):  
Thin Layer ◽  
Mobile Phase ◽  
High Performance ◽  
Potassium Dihydrogen Phosphate ◽  
High Performance Liquid Chromatographic ◽  
Ultraviolet Absorption ◽  
Simultaneous Estimation ◽  
Dihydrogen Phosphate ◽  
Aluminum Sheets ◽  
Tablet Formulations

Abstract This paper describes validated high-performance liquid chromatographic (LC) and high-performance thin-layer chromatographic (TLC) methods for the simultaneous estimation of olanzapine and fluoxetine in pure powder and tablet formulations. The LC separation was achieved on a Lichrospher 100 RP-180, C18 column (250 mm, 4.0 mm id, 5 m) using 0.05 M potassium dihydrogen phosphate buffer (pH 5.6 adjusted with o-phosphoric acid) acetonitrile (50 + 50, v/v) as the mobile phase at a flow rate of 1 mL/min and ambient temperature. The TLC separation was achieved on aluminum sheets coated with silica gel 60F254 using methanoltoluene (40 + 20, v/v) as the mobile phase. Quantitation was achieved by measuring ultraviolet absorption at 233 nm over the concentration range of 1070 and 40280 g/mL with mean recovery of 99.54 0.89 and 99.73 0.58% for olanzapine and fluoxetine, respectively, by the LC method. Quantitation was achieved by measuring ultraviolet absorption at 233 nm over the concentration range of 100800 and 4003200 ng/spot with mean recovery of 101.53 0.06 and 101.45 0.35% for olanzapine and fluoxetine, respectively, by the TLC method with densitometry. These methods are simple, precise, and sensitive, and they are applicable for simultaneous determination of olanzapine and fluoxetine in tablet formulations.

scholarly journals Stability-Indicating Method for Determination of Oxyphenonium Bromide and Its Degradation Product by High-Performance Liquid Chromatography

2007 ◽  
Vol 90 (5) ◽  
pp. 1250-1257 ◽  
Author(s):  
Alaa EL-Gindy ◽  
Samy Emara ◽  
Heba Shaaban
Keyword(s):  
Degradation Product ◽  
High Performance ◽  
Potassium Dihydrogen Phosphate ◽  
Order Rate Constant ◽  
High Performance Liquid Chromatographic ◽  
Hplc Method ◽  
Dihydrogen Phosphate ◽  
Stability Indicating Method ◽  
Oxyphenonium Bromide

Abstract A high-performance liquid chromatographic (HPLC) method was developed for determination of oxyphenonium bromide (OX) and its degradation product. The method was based on the HPLC separation of OX from its degradation product, using a cyanopropyl column at ambient temperature with mobile phase of acetonitrile25 mM potassium dihydrogen phosphate, pH 3.4 (50 + 50, v/v). UV detection at 222 nm was used for quantitation based on peak area. The method was applied to the determination of OX and its degradation product in tablets. The proposed method was also used to investigate the kinetics of the acidic and alkaline degradation of OX at different temperatures, and the apparent pseudo first-order rate constant, half-life, and activation energy were calculated. The pH-rate profile of the degradation of OX in Britton-Robinson buffer solutions within the pH range 212 was studied.

Simultaneous Determination of 11 Aminoglycoside Residues in Honey, Milk, and Pork by Liquid Chromatography with Tandem Mass Spectrometry and Molecularly Imprinted Polymer Solid Phase Extraction

2017 ◽  
Vol 100 (6) ◽  
pp. 1869-1878 ◽  
Author(s):  
Bixia Yang ◽  
Lian Wang ◽  
Chunying Luo ◽  
Xixi Wang ◽  
Chengjun Sun
Keyword(s):  
Simultaneous Determination ◽  
Molecularly Imprinted Polymer ◽  
Solid Phase ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Imprinted Polymer ◽  
Ionization Source ◽  
Molecularly Imprinted ◽  
Potassium Dihydrogen

Abstract An analytical method was developed for the simultaneous determination of 11 aminoglycoside (AG) antibiotics, including amikacin, paromomycin, dihydrostreptomycin, gentamicin C1a, hygromycin, kanamycin, netilmicin, spectinomycin, sisomicin, streptomycin, and tobramycin in honey, milk, and pork samples by LC with tandem MS and molecularly imprinted polymer (MIP) SPE. The AG antibiotics in milk and homogenated meat samples were extracted with a solution composed of 10 mmol/L potassium dihydrogen phosphate, 0.4 mmol/L EDTA-Na2, and 2% trichloroacetic acid. For honey samples, the extractant was 50 mmol/L potassium dihydrogen phosphate. The extracts were cleaned up with MIP SPE cartridges. The separation was performed on a zwitter ionic-HILIC column (50 × 2.1 mm, 3.5 μm), with the mobile phase consisting of methanol, 0.3% formic acid, and 175 mmol/L ammonium formate at 0.50 mL/min in gradient elution. A triple-quadrupole mass spectrometer equipped with an electrospray ionization source, which was operated in positive mode, was used for detection. The quantification was based on matrix-matched calibration curves. The method was applied to real samples with three different matrixes. The LODs of the method were 2–30 μg/kg and the LOQs were 7–100 μg/kg; the average recovery ranged from 78.2 to 94.8%; intraday RSDs and interday RSDs were ≤15 and ≤18%, respectively; and the absolute values of matrix effect for all AGs were RSDs ≤23%.

scholarly journals The Determination of Metronidazole and Chlorhexidine Gluconate in Metronidazole and Chlorhexidine Lotion by HPLC

2022 ◽  
Vol 2152 (1) ◽  
pp. 012016
Author(s):  
Yun Yun ◽  
Mingshi Lin
Keyword(s):  
Potassium Dihydrogen Phosphate ◽  
Hplc Method ◽  
Chlorhexidine Gluconate ◽  
Dihydrogen Phosphate ◽  
Phosphate Solution ◽  
Phase Detection ◽  
Solution Ph ◽  
Tetrabutylammonium Hydroxide ◽  
Potassium Dihydrogen

Abstract Objective “To establish an HPLC method for the determination of metronidazole and chlorhexidine gluconate in metronidazole and chlorhexidine lotion. Method Using Agilent Eclipse-XDB-C18 chromatographic column, with 0.05 mol·L-1 potassium dihydrogen phosphate solution 1000 ml plus 13.2 ml 10% tetrabutylammonium hydroxide aqueous solution (pH adjusted to 3.5 by phosphoric acid)-acetonitrile (77:23) as Mobile phase, detection wavelength 230 nm. Results The two components could be separated well. The linear ranges of metronidazole and chlorhexidine acetate were 36.33~59.04 μg·ml-1 (r = 0.9994) and 35.45~220.11 μg·ml-1 (r = 1).); The average recoveries were 100.6% and 100.5 %, and the RSD were 0.42% and 0.58%. Conclusion: The method is simple and specific, and the result is more accurate and reliable. Which is suitable for simultaneous determination of two components in compound preparations.

scholarly journals Development of a high-performance liquid chromatography method for simultaneously analyzing Guanosine 5’-monophosphate (GMP) and Inosine 5’-monophosphate (IMP) in food

2021 ◽  
Vol 4 (4) ◽  
pp. 298-306
Author(s):  
Dinh Hai Le ◽  
Thu Nguyen Thi ◽  
Trang Vu Thi ◽  
Thuy Le Thi ◽  
◽  
...  
Keyword(s):  
High Performance ◽  
Potassium Dihydrogen Phosphate ◽  
Food Products ◽  
Hplc Method ◽  
Dihydrogen Phosphate ◽  
Food Matrix ◽  
Chromatography Method ◽  
Potassium Dihydrogen ◽  
Sample Preparation Procedure ◽  
Liquid Chromatography Method

This study aimed to develop a HPLC method to simultaneously analyze guanosine 5’-monophosphat (GMP) and inosine 5’-monophosphat (IMP) in food products. Sample preparation procedure was simple, fast. A C18 column (250 mm × 4.6 mm, 5 µm) was used as stationary phase, and a mixture of 10 mM potassium dihydrogen phosphate and 5 mM sodium heptanesulfonate was applied as mobile phase, and PDA detector at 250 nm. The method validation followed AOAC criteria. Selectivity, linearity (R2 > 0.999), recovery (IMP: 90.5 % - 102.8 %, GMP: 91.5 % - 103.9 %), repeatability (RSDR of IMP: 3.07 % and GMP: 2.83 %) were acceptable to determination GMP and IMP in food matrix under AOAC guidelines. LOD of GMP and IMP were of 2.32 and 2.77 mg/kg, respectively. This method was used to determination GMP, IMP in food products collected in Hanoi markets.

scholarly journals THE ESTIMATION METHOD OF S-ACID LACTIC IN THE FERMENTATION PRODUCTS OF ALOE VERA GEL BY HIGH- PERFORMANCE LIQUID CHROMATOGRAPHY

2017 ◽  
Vol 126 (1B) ◽  
pp. 107
Author(s):  
Nguyen Kim Dong ◽  
Duong Thi Bich ◽  
Nguyen Chi Toan
Keyword(s):  
High Performance ◽  
Aloe Vera ◽  
Estimation Method ◽  
Potassium Dihydrogen Phosphate ◽  
High Performance Liquid Chromatographic ◽  
Dihydrogen Phosphate ◽  
Uv Detector ◽  
Fermentation Products ◽  
Aloe Vera Gel ◽  
Liquid Chromatographic

<p> <em>An accurate, precise, simple and economical High Performance Liquid Chromatographic method for the estimation of </em><em>S-acid lactic in the process of fermentation</em><em> of </em><em>Aloe Vera</em><em> gel</em><em> has been developed. The method is using </em><em>HIQSIL 100 C18column (Length: 250nm, Diameter: 4.6nm, Particle size: 5μ) with potassium dihydrogen phosphate as mobile phase. The separation was performed by UV detector at 210 nm</em> <em>wavelength. The flow rate was kept at 1mL/min and the injection volume was 20μl. The results obtained showed that the linearity of the method was 0-180 ppm, and the correlation coefficient was found to be 0.999. Detection limit of the method for S-acid lactic was 1.15 ppm. The mean recoveries were from 95% to 99%. The reproducibility RSDs ranged from 2.87%. The results demonstrated the suitability of the HPLC approach for the analysis of S-acid lactic in the process of fermentation from Aloe Vera gel.</em></p>

scholarly journals High-Performance Liquid Chromatographic Method for the Determination of Moniliformin in Corn

1998 ◽  
Vol 81 (5) ◽  
pp. 999-1004 ◽  
Author(s):  
Célestin Munimbazi ◽  
Lloyd B Bullerman
Keyword(s):  
High Performance ◽  
Chromatographic Method ◽  
Solid Phase ◽  
High Performance Liquid Chromatographic ◽  
Reversed Phase ◽  
Detector Response ◽  
Dihydrogen Phosphate ◽  
Sodium Dihydrogen Phosphate ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic

Abstract A high-performance liquid chromatographic method using UV absorption was developed for determining moniliformin in corn. The toxin was extracted with water containing 1 % tetrabutylammonium hydrogen sulfate (w/v). Paired moniliformin was partitioned into dichloromethane, which was evaporated to dryness at 50 C. The residue was dissolved in water and applied to a disposable stronganion exchange solid-phase extraction tube. Adsorbed moniliformin was eluted from the tube with 0.05M sodium dihydrogen phosphate monohydrate (pH 5). It was determined by ion-pair reversed-phase chromatography and UV measurement at 229 nm. The minimum detectable amount of pure moniliformin was 0.25 ng/injection (signal-to-noise ratio = 3:1). The detector response was linear from 0.25 to at least 20 ng. The limit of determination was 0.025 μg/g corn. Recoveries of moniliformin from corn spiked at 0.025,0.05,0.25, and 1.0 μg/g averaged 96.5,96.2, 97.2, and 97.8% respectively

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