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Assay and Organic Impurity Profiling of Apixaban Using an Ascentis® Express C18 Column and UV Detection
Apixaban is sold under the tradename Eliquis and at present no pharmacopeial monographs are available for Axpixaban using either an assay and/or organic impurity profiling method. A newly developed and validated HPLC-UV method using a column with C18 solid core
Method Optimization for LC-MS Analysis of Vitamin D Metabolite Critical Pairs in Serum
Using HybridSPE-Phospholipid, Ascentis Express, and Other LC-MS Workflow Components
Determination of Formaldehyde and Acetaldehyde in Air Using DNPH Cartridges and Automated On-Line Desorption Followed by HPLC
Carbonyl compounds react within the DNPH cartridge to form immobilized hydrazones, which can be subjected to automated desorption and HPLC analysis with UV detection.
Ascentis® Express Phenyl Hexyl Columns for U/HPLC
Improve your reversed phase selectivity for polar aromatics and heterocyclic compounds with the Ascentis® Express Phenyl-Hexyl U/HPLC column.
Chromolith® HPLC and UHPLC columns
Chromolith® HPLC and UHPLC columns are made from monolithic silica with a bimodal pore structure using sol-gel technology.
Evaluation of Different Enzymes on Hydrolysis Efficiencies of Glucuronide Drug Metabolites in Urine
β-glucuronidase (GUS) enzymes are utilized to hydrolyze glucuronide (gluc) drug metabolites to the parent drug, facilitating analysis by LC-MS/MS.
Ascentis® Express C18 U/HPLC Columns
Ascentis® Express C18 is the first choice when starting a new separation method.
How to Select the Right Water Purification System for Your Lab
Technical article on Selecting the Right Water Purification System
LC/MS (TOF) Analysis of Antiarrhythmic Drugs and Metabolites on Ascentis® Express HILIC
HILIC mobile phases consist of a high composition of acetonitrile, which facilitates the direct analysis of precipitated plasma samples without the need for additional sample solvent exchange.
HPLC Analysis of Z-Drugs on Ascentis® Express ES-Cyano 2.0 μm
An rapid method for the siµLtaneous determination of the Z-drugs or sleep aids: zopiclone, zolpidem, and zaleplon is presented here. The need for greater analytical capacity and throughput for the analysis of sleep aid medicines (Z-drugs) in forensic toxicology laboratories
High-Resolution U/HPLC Separation of Monoclonal Antibodies with the BIOshell™ IgG 1000 Å Diphenyl
BIOshell™ IgG 1000 Å Diphenyl columns are perfectly suitable for the separation of monoclonal antibodies, antibody-drug conjugates, antibody fragments and large proteins with molecular weights ≤ 500 kDa with alternative selectivity to C4 and C18 column chemistries to ensure maximum
Dyestuff Analyses on Historic Objects by LC-ESI-MS/MS Using a Superspher RP-18 HPLC Column
In this study, LC-ESI-MS/MS under reversed phase conditions using a Superspher RP-18 column is applied to analyze dyestuffs of a reddish historic textile from South America.
LC/MS Analysis of Ethanol Metabolites in Urine on Ascentis® Express OH5 after Dilution with Deuterated Internal Standards
The method shown uses HILIC mode on an Ascentis® Express OH5 column to retain both analytes well, making it very likely to be more robust and reliable, as well as highly MS-friendly.
UHPLC/MS Analysis of Diazepam and Metabolites on Titan™ C18, Comparison of Flow Rate and Column Length
Separation of Oxazepam; Desmethyldiazepam, analytical standard; Temazepam, analytical standard; Diazepam
HPLC Analysis of Methylphenobarbital (Mephobarbital) Enantiomers on Astec® CHIROBIOTIC® V
Separation of Mephobarbital, United States Pharmacopeia (USP) Reference Standard
Determination of Buprenorphine and Norbuprenorphine in Urine Using LC-MS/MS
Determination of Buprenorphine and Norbuprenorphine in Urine Using LC-MS/MS
UHPLC Analysis of Conjugated Estrogens on Ascentis ® Express C18
Separation of Estriol 3-(β-D-glucuronide) sodium salt; β-Estradiol 3-(β-D-glucuronide) 17-sulfate dipotassium salt; Estriol 3-sulfate sodium salt; β-Estradiol 3,17-disulfate dipotassium salt, ≥95%; β-Estradiol 17-(β-D-glucuronide) sodium salt; β-Estradiol 3-(β-D-glucuronide) sodium salt; Estrone 3-(β-D-glucuronide) sodium salt; β-Estradiol 3-sulfate sodium salt, ≥93%; Estriol, ≥97%; Estrone
Determination of Sucralose in Soy Sauce using HPLC-ELSD following the Chinese National Standard (GB) Method
The most frequently used synthetic sweeteners are: saccharin, cyclamate, aspartame, and sucralose (E955), and this application illustrate the analysis of sucralose from soy sauce following the current Chinese national standard method.
HPLC Analysis of Sibutramine Enantiomers on Astec® CHIROBIOTIC® V
Separation of Sibutramine hydrochloride monohydrate, ≥98% (HPLC), solid
Determination Paeonol Morroniside Loganin Liuwei Dihuang Oral Solution
Method development for the extraction and analysis of paeonol, morroniside, loganin active ingredients in traditional Chinese medicine (TCM) according to Chinese pharmacopeia monograph using HPLC-UV
HPLC Tips & Tricks: Mobile Phase Preparation Part 2 - Buffers
Learn the tips and tricks of selecting and preparing a suitable mobile phase buffer for your HPLC separations and method developments for samples that contain ionizable compounds.
HPLC analysis of Letrozole and its impurities by following the USP Guidelines Using a Purospher® STAR RP18e Column and UV Detection
An application note concerning the HPLC analysis of letrozole and its impurities by following the USP43-NF38 Guidelines using a Purospher® STAR RP18e Column.
Ion Chromatography & Cation Suppression Straightforward Cation Analysis at Trace Levels
Ammonium determination in acidic solutions with Metrosep C Supp 2 column using the acidic binary IC eluent nitric acid/rubidium nitrate concentrate and the sodium bicarbonate/sodium carbonate suppressor regenerant.
Separation of Organic Acids with 100% aqueous mobile phase using an Ascentis® Express AQ-C18 HPLC Column
A new RP-HPLC method is proposed for the determination of organic acids in 100% aqueous mobile phase using an Ascentis® Express AQ-C18 column
Determination of Chlorogenic acid and Baicalin in compounded Lonucerae Japonicae Flos with Purospher® STAR RP-18e
Extraction and analysis of chlorogenic acid and baicalin active ingredients in traditional Chinese medicine (TCM) according to Chinese pharmacopeia monograph by HPLC with Purospher® RP-18e column
HPLC Analysis of Proteins on BIOshell™ A400 Protein C4, Rapid Separation at Elevated Temperature
For use as a marker in SDS-PAGE; lactate dehydrogenase; contaminant; L-Lactic Dehydrogenase from rabbit muscle, Type XI, lyophilized powder, 600-1,200 units/mg protein
HPLC Analysis of Sugars by HILIC Chromatography using Ascentis® Express OH-5 Column with ELSD Detection
Separation of Dextrose, Pharmaceutical Secondary Standard; Certified Reference Material; Sucrose; Maltitol, Pharmaceutical Secondary Standard; Certified Reference Material
HPLC determination of Besifloxacin in Ophthalmic Suspension using Chromolith® SpeedROD RP-18e Column
A new HPLC method is proposed for the determination of Besifloxacin, a fluoroquinolone antibiotic in ophthalmic suspension using a Chromolith® SpeedROD RP-18e column. Read now!
Determination of Ethyl Glucuronide and Ethyl Sulfate in Urine using LC-MS/MS
This study is aimed at developing and validating an LC-ESI-ion trap-MS/MS method for identification and quantification of ethyl glucuronide (EtG) and ethyl sulfate (EtS) as ethanol biomarkers for urine analysis.
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