scholarly journals HPLC Method Determination of Isoliquiritin Apioside and Isoliquiritin in Rat Plasma for Application in Pharmacokinetic Study after an Oral Administration of Zhigancao Extract

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Yan-yun Yang ◽  
Liang Xu ◽  
Song-yao Hao ◽  
Yan Li ◽  
Zhen-Qiu Zhang
Keyword(s):  
Oral Administration ◽  
Pharmacokinetic Study ◽  
Mobile Phase ◽  
Internal Standard ◽  
Rat Plasma ◽  
Hplc Method ◽  
Plasma Samples ◽  
Limit Of Quantification ◽  
Precision And Accuracy

A sensitive HPLC method was developed for the quantitative determination of isoliquiritin apioside (ILA) and isoliquiritin (IL) in rat plasma. After protein precipitation with acetonitrile, chloroform was used to separate lipid-soluble impurities from the plasma samples and remove acetonitrile. A chromatography was carried out on Diamonsil C18 (150×4.6 mm; 5 μm) analytical column, using a mobile phase consisting of water (containing phosphoric acid 0.1%, v/v); acetonitrile (72 : 28, v/v) at a flow rate of 1.0 mL/min. The wavelength-switching technology was performed to determine ILA and IL at 360 nm and wogonoside (internal standard, IS) at 276 nm. The calibration curves of ILA and IL were fairly linear over the concentration ranges of 0.060–3.84 μg/mL (r=0.9954) and 0.075–4.80 μg/mL (r=0.9968), respectively. The average extract recoveries of ILA, IL, and IS were all over 80%. The precision and accuracy for all concentrations of quality controls and standards were within 15%. The lower limit of quantification (LLOQ) was 0.060 μg/mL for ILA and 0.075 μg/mL for IL. The method was used in pharmacokinetic study after an oral administration of Zhigancao extract to rats.

scholarly journals Simultaneous Determination and Pharmacokinetic Comparisons of Multi-Ingredients after Oral Administration ofRadix Salviae MiltiorrhizaeExtract, Hawthorn Extract, and a Combination of Both Extracts to Rats

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Yu-Qiang Liu ◽  
Qian Cai ◽  
Chang Liu ◽  
Feng-Wei Bao ◽  
Zhen-Qiu Zhang
Keyword(s):  
Oral Administration ◽  
Simultaneous Determination ◽  
Pharmacokinetic Study ◽  
Rosmarinic Acid ◽  
Rat Plasma ◽  
Hplc Method ◽  
Radix Salviae Miltiorrhizae ◽  
Salviae Miltiorrhizae ◽  
Hawthorn Extract

A simple and sensitive HPLC method was developed for simultaneous determination of danshensu (DSS), rosmarinic acid (RA), lithospermic acid (LA), salvianolic acid B (SAB), and hyperoside (HP) in rat plasma. This method validated was successfully applied to the pharmacokinetic study of the main active ingredients after oral administration ofRadix Salviae Miltiorrhizaeextract (SME), hawthorn extract (HTE), and a combination of both extracts (2.5 : 1) to rats. The results indicated that there have been great differences in pharmacokinetics between a single extract and a combination of both extracts. A combination of both extracts can enhance their bioavailabilities and delay the elimination of SAB and DSS in rats.

scholarly journals Validation and Optimization of a Simple RP-HPLC Method for the Determination of Paracetamol in Human Serum and its Application in a Pharmacokinetic Study with Healthy Bangladeshi Male Volunteers

2015 ◽  
Vol 13 (2) ◽  
pp. 125-131
Author(s):  
Anisa Alam Tanam ◽  
Mohammad Firoz Khan ◽  
Ridwan Bin Rashid ◽  
Md Zakir Sultan ◽  
Mohammad A Rashid
Keyword(s):  
Human Serum ◽  
Pharmacokinetic Study ◽  
Internal Standard ◽  
Immediate Release ◽  
Hplc Method ◽  
Serum Samples ◽  
Limit Of Quantification ◽  
Rp Hplc ◽  
Relative Standard

Acetaminophen (paracetamol) is an analgesic and antipyretic agent with minimum anti-inflammatory properties. In the present study a simple, fast, accurate, precise and reproducible RP-HPLC method has been developed and validated for the quantification of paracetamol in human serum samples using theophylline as internal standard. Protein precipitation with perchloric acid was employed in the extraction of paracetamol and theophylline from biological matrix. The chromatographic separation was accomplished on Phenomenex C18 column with a mobile phase comprising of 0.05 mM sodium sulfate buffer (pH 2.2 ± 0.02 adjusted with phosphoric acid) and acetonitrile at a ratio of 93:7 at a flow rate of 1.0 ml/min. The chromatogram was monitored by UV detection at a wavelength of 254 nm. The method was validated over a linear concentration range of 2-100 ?g/ml and limit of quantification (LOQ) was 1.61 ?g/ml with a correlation coefficient (r2) 0.997. The intra-day and inter-day precision expressed as relative standard deviation were found to be 0.49 - 2.68% and 0.36 - 3.44%, respectively. The average recovery of paracetamol from serum ranged from 99.0 - 106.4%. The method was successfully applied to a pharmacokinetic study after oral administration of immediate release paracetamol tablet (1000 mg) in four healthy Bangladeshi volunteers. The mean Cmax was found to be 11.03 ± 3.21 ?g/ml, which occurred at Tmax of 0.88 ± 0.14 hr. The half life, AUC0-8 and AUC0-? values were found to be 3.09 ± 0.71 hr, 31.06 ± 6.57 hr-?g/ml and 37.92 ± 9.51 hr- ?g/ml, respectively. DOI: http://dx.doi.org/10.3329/dujps.v13i2.21889 Dhaka Univ. J. Pharm. Sci. 13(2): 125-131, 2014 (December)

Development of an HPLC Method for the Determination of Meropenem/Vaborbactam in Biological and Aqueous Matrixes

2020 ◽  
Vol 58 (8) ◽  
pp. 726-730
Author(s):  
Christina A Sutherland ◽  
David P Nicolau
Keyword(s):  
Mobile Phase ◽  
Good Accuracy ◽  
Internal Standard ◽  
Reversed Phase ◽  
Hplc Method ◽  
Uv Detector ◽  
Sodium Phosphate Buffer ◽  
Accuracy And Precision ◽  
Precision And Accuracy

Abstract A HPLC method was developed and validated to analyze meropenem and vaborbactam simultaneously in murine plasma and saline matrixes. A 60-μL volume of extracted sample was injected onto a 5-μm BDS Phenyl-Hypersil C18 reversed-phase column and analyzed with a UV detector set at 298 nm for the first 4.9 min and switched to 240 nm. The mobile phase contained a mixture of methanol and 25-mM sodium phosphate buffer set at a flow rate of 1.0 mL/min for the 16 min run time. Cefuroxime was used as the internal standard. The standard curves were linear over a range of 0.25–50 μg/mL. The precision and accuracy for 0.25 μg/mL (LLQ) in plasma for both compounds were <4.8% and >98.9%, respectively. Interday and intraday precision and accuracy for all QC plasma samples for both compounds were <6.2% and >95.7%, respectively. This methodology details a reproducible assay for both compounds using a single extraction with good accuracy and precision.

scholarly journals Comparative validation of HPLC, densitometric and videodensitometric determination of lamotrigine in pharmaceutical

2014 ◽  
Vol 27 (4) ◽  
pp. 258-262
Author(s):  
Beata Paw
Keyword(s):  
Quality Control ◽  
Flow Rate ◽  
Mobile Phase ◽  
Internal Standard ◽  
Correlation Coefficients ◽  
Hplc Method ◽  
Densitometric Detection ◽  
Precision And Accuracy ◽  
Comparative Validation

Abstract Simple, sensitive, precise and accurate HPLC, densitometric and videodensitometric methods for determination of lamotrigine in tablet forms were developed and validated. The HPLC method was carried out using a Symmetry C8 column and a mobile phase acetonitrile-phosphate buffer pH 2.80 (25:75, v/v), with a flow rate of 1 mL/min, and UV detection at 210 nm. Ethosuximide was used as the internal standard. Densitometric and videodensitometric analysis was performed on silica gel 60 F254 plates, in horizontal chambers, with methanol-chloroform-ammonia (25%) 1.5:7.5:1, (v/v) as mobile phase. Densitometric detection was performed at 225 nm and at 315 nm, and videodeoscanning at 254 nm. Calibration plots were constructed in the range 0.5-10 μg/spot, with good correlation coefficients r > 0.99 for both methods. The precision and accuracy of all elaborated methods were compared. Finally, the developed methods were applied for the quality control of lamotrigine tablets.

Determination of Shanzhiside Methylester in Rat Plasma by Uplc-Ms/Ms and its Application to a Pharmacokinetic Study

2020 ◽  
Vol 16 (7) ◽  
pp. 960-966
Author(s):  
Qinghua Weng ◽  
Yichuan Chen ◽  
Zuoquan Zhong ◽  
Qianqian Wang ◽  
Lianguo Chen ◽  
...  
Keyword(s):  
Mobile Phase ◽  
Multiple Reaction Monitoring ◽  
Internal Standard ◽  
Gradient Elution ◽  
Rat Plasma ◽  
Precipitation Method ◽  
Reaction Monitoring ◽  
Limit Of Quantification ◽  
Pharmacokinetics In Rats

Introduction: In this study, we used UPLC-MS/MS to detect shanzhiside methylester in rat plasma, and investigated its pharmacokinetics in rats. Materials and Methods: Diazepam was utilized as an internal standard (IS), and acetonitrile precipitation method was used to process the plasma samples. Chromatographic separation was achieved using a UPLC BEH C18 column using mobile phase of methanol-0.1 % formic acid with gradient elution. Electrospray ionization (ESI) tandem mass spectrometry in multiple reaction monitoring (MRM) mode with positive ionization was applied. Results: The results indicated that within the range of 5-4000 ng/mL, linearity of shanzhiside methylester in rat plasma was acceptable (r>0.995), and the lower limit of quantification (LLOQ) was 5 ng/mL. Intra-day and inter-day precision RSD of shanzhiside methylester in rat plasma were lower than 14%. Accuracy range was between 87.3 % and 109.1 %, and matrix effect was between 99.2% and 106.3%. Conclusion: The method was successfully applied in the pharmacokinetics of shanzhiside methylester in rats after intravenous administration.

scholarly journals Simultaneous Determination of Columbianadin and Its Metabolite Columbianetin in Rat Plasma by LC-MS/MS: Application to Pharmacokinetics of Columbianadin after Oral Administration

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Jin Li ◽  
Zhen Li ◽  
Qian Luo ◽  
Chun-Peng Wang ◽  
Jun He ◽  
...  
Keyword(s):  
Oral Administration ◽  
Internal Standard ◽  
Rat Plasma ◽  
Pharmacokinetic Parameters ◽  
Antitumor Activities ◽  
Limit Of Quantification ◽  
Potential Development ◽  
Liquid Chromatography Tandem Mass ◽  
Acetate Aqueous Solution

Columbianadin and its metabolite columbianetin exhibited the anti-inflammatory, analgesic, calcium channel blocking and antitumor activities. To compare the differences between pharmacokinetics of columbianadin and its metabolite columbianetin after oral administration of pure columbianadin and Angelicae Pubescentis Radix (APR) extract, a simple and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was established and validated to simultaneously determine columbianadin and columbianetin in rat plasma. Two analytes and an internal standard (warfarin) were well separated and determined after liquid-liquid extraction with ethyl acetate. Ammonium acetate aqueous solution (1 mmol/L) and acetonitrile were used as the mobile phase and the flow rate was 0.3 mL/min. The lower limit of quantification (LLOQ) was 0.1 ng/mL for columbianetin and 0.5 ng/mL for columbianadin, respectively. There were significant differences between some pharmacokinetic parameters and bioavailability of columbianadin after oral administration of pure columbianadin and APR extract. The studies on comparative pharmacokinetics of columbianadin were of great use for facilitating the clinical application of columbianadin and were also highly meaningful for the potential development of APR.

scholarly journals Development and Validation of a HPLC Method to Determine Griseofulvin in Rat Plasma: Application to Pharmacokinetic Studies

2008 ◽  
Vol 3 ◽  
pp. ACI.S953 ◽  
Author(s):  
Bo Wei ◽  
Dong Liang ◽  
Theodore R. Bates
Keyword(s):  
Mobile Phase ◽  
Limit Of Detection ◽  
Internal Standard ◽  
Rat Plasma ◽  
Hplc Method ◽  
Pharmacokinetic Studies ◽  
Dihydrogen Phosphate ◽  
Sodium Dihydrogen Phosphate ◽  
Limit Of Quantification ◽  
Sodium Dihydrogen

A simple, specific, sensitive, and rapid high performance liquid chromatography (HPLC) method for the determination of griseofulvin in small volumes of rat plasma was developed and validated using warfarin as an internal standard. Biological sample preparation involved simple extraction with acetonitrile, followed by dilution with aqueous mobile phase buffer (20 mM sodium dihydrogen phosphate, pH 3.5) to eliminate any chromatographic solvent effects. Griseofulvin and warfarin were baseline separated and quantitated on a C18 reversed phase column (4.6 x 150 mm, 3.5 µm), using a mobile phase composed of a 20 mM aqueous solution of sodium dihydrogen phosphate-acetonitrile (55:45, v/v, pH 3.5) delivered at a flow rate of 1.0 mL/min, and with fluorescence detection (λexcitation = 300 nm, λemission = 418 nm). The method was proven to be linear over a plasma griseofulvin concentration range of 10 to 2500 ng/mL with a mean correlation coefficient of 0.9996. The intra-day and inter-day accuracy (relative error) were in the range of 0.89% to 9.26% and 0.71% to 7.68%, respectively. The within-day precision (coefficient of variation) was less than 3.0% and the between-day precision was less than 7.5%. The mean recovery of griseofulvin from rat plasma was found to be 99.2%. The limit of detection (LOD) and the limit of quantification (LOQ) of griseofulvin were determined to be 1 ng/mL and 10 ng/mL, respectively. The developed method was successfully applied to quantitatively assess the pharmacokinetics of griseofulvin in rats following a single 50 mg/kg oral dose of the drug.

QUANTITATIVE DETERMINATION OF CURCUMIN IN TURMERIC POWDER AND TURMERIC–HONEY BALL PILLS BY HPLC

2018 ◽  
Vol 8 (4) ◽  
pp. 42-47
Author(s):  
Tien Nguyen Huu ◽  
Tram Le Thi Bao ◽  
Ngoc Nguyen Thi Nhu ◽  
Thang Phan Phuoc ◽  
Khan Nguyen Viet
Keyword(s):  
Acetic Acid ◽  
Gastric Mucosa ◽  
Quantitative Determination ◽  
Mobile Phase ◽  
Curcuma Longa ◽  
Biological Marker ◽  
Hplc Method ◽  
Chromatography Analysis ◽  
Precision And Accuracy

Background: Curcumin is a major ingredient in turmeric (Curcuma longa L., Zingiberaceae), which has important activities such as anti-tumor, anti-inflammatory, antioxidant, anti-ischemia, protection of gastric mucosa etc,. Curcumin can be considered as a biological marker of turmeric and turmeric products. Objectives: Developing an HPLC method for quantification of curcumin in turmeric powder and turmeric - honey ball pills; applying this method for products on the market. Materials and methods: turmeric powder and turmeric - honey ball pills collected in Thua Thien Hue province. After optimization process, the method was validated and applied to evaluate the content of curcumin. Results: The chromatography analysis was performed with: Zorbaz Eclipse XDB-C18 (150 × 4.6 nm; 5 µm); Mobile phase: acetonitril: 2% acetic acid (45:55), Flow rate was kept constant at 1.0 ml/min; Detector PDA (420 nm). The method was validated for the HPLC system compatibility, specificity, linearity range, precision and accuracy; the recovery greater than 98%. Conclusion: The developed HPLC method can determine curcumin in turmeric powder and turmeric - honey ball pills. Key words: Curcumin, turmeric powder, turmeric-honey ball pills, quantitative determination, HPLC

Development and validation of a LC-MS/MS method for quantification of mobocertinib (TAK-788) in plasma and its application to pharmacokinetic study in rats

2020 ◽  
Vol 23 ◽  
Author(s):  
Bo Li ◽  
Jin Wang ◽  
Xinyao Dou ◽  
Xinjie Zhang ◽  
Xianbei Xue ◽  
...  
Keyword(s):  
Oral Administration ◽  
Pharmacokinetic Study ◽  
High Performance ◽  
Kinase Inhibitor ◽  
Internal Standard ◽  
Selected Reaction Monitoring ◽  
Precipitation Method ◽  
Plasma Samples ◽  
Bioanalytical Method Validation ◽  
Extraction Recovery

Aim and Objective:: An analytical method for the determination of mobocertinib, an investigational tyrosine kinase inhibitor, was developed and optimized by high-performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) in rat plasma. Materials and Methods:: Plasma samples were pretreated by the protein precipitation method with a methanol solution of osimertinib as the internal standard (IS). Chromatographic separation was performed using an Inertsil ODS-3 column (50 mm × 4.6 mm, I.D. 5 μm) column with the temperature maintained at 40 °C. The mobile phase consisted of water (containing 0.1% formic acid) and methanol in a gradient mode at a flow rate of 0.5 mL/min. Mass spectrometric detection was carried out in the selected reaction monitoring (SRM) mode with positive electrospray ionization, and the mass transitions of mobocertinib and osimertinib were m/z 587.01 → 71.88 and m/z 499.80 → 71.94, respectively. The method was validated in terms of selectivity, linearity, accuracy and precision, extraction recovery and matrix effect, stability and carryover as per the guidelines for bioanalytical method validation (FDA, 2018). The method was applied to the pharmacokinetic study of mobocertinib in rats by oral gavage at the doses of 2, 6, and 18 mg/kg. A total of 216 plasma samples from 18 rats were analyzed. Results:: It showed good linearity over the range of 1-1000 ng/mL (R2 = 0.9957). The intra-batch accuracy was within 94.65-102.59% and the precision was within 5.49-10.46%. The inter-batch accuracy was within 97.08-102.25% with a precision of 7.54-10.13%. The extraction recovery and matrix factor were acceptable for the bioanalysis of mobocertinib. Additionally, mobocertinib was found to be stable under the detected conditions. Mobocertinib showed linear pharmacokinetic characteristics following oral administration to rats at 2.0-18.0 mg/kg. Conclusion:: The developed and validated method was successfully employed in the pharmacokinetic study in rats following oral administration of mobocertinib at the doses of 2, 6, and 18 mg/kg.

LC–MS/MS Determination of Apigenin in Rat Plasma and Application to Pharmacokinetic Study

2020 ◽  
Vol 21 ◽  
Author(s):  
Shixing Zhu ◽  
Jiayuan Zhang ◽  
Zhihua Lv ◽  
Mingming Yu
Keyword(s):  
Formic Acid ◽  
Pharmacokinetic Study ◽  
Ammonium Acetate ◽  
Rat Plasma ◽  
Biological Properties ◽  
Plasma Samples ◽  
Supply Rate ◽  
Natural Plant ◽  
Ammonium Acetate Buffer

Background: Apigenin, a natural plant flavone, has been shown to possess a variety of biological properties. Objective: In this report, a highly selective and sensitive LC-MS/MS method was developed and validated for the determination of apigenin in rat plasma. Methods: Analysts were separated on the HSS T3 column (1.8 μm 2.1×100 mm) using acetonitrile and 0.1% formic acid in 2 mM ammonium acetate buffer at a supply rate of 0.200 mL/min as eluent in gradient model. Results: Plasma samples were treated by protein precipitation using acetonitrile for the recovery ranging from 86.5% to 90.1% for apigenin. The calibration curves followed linearity in the concentration range of 0.50-500 ng/mL. The inter-day and intra-day precisions at different QC levels within 13.1% and the accuracies ranged from -10.6% to 8.6%. Conclusion: The assay has been successfully applied to the pharmacokinetic study of apigenin in rats.

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