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1105 matches found for high_performance_liquid_chromatography

Praziquantel Determination in Aquarium Water by Direct Injection of Samples Using a Monolithic Silica Column

Analytix Reporter Issue 2 | 2018 Products & Related Products • View Product List • Chromolith® Columns • HPLC & UHPLC Solvents • Praziquantel Standards Related Links • Environmental Testing • Digital Test Strip Readout with MQuant® StripScan Related Articles • Analytix Reporter Vol. 2 (PDF) Applicat...

Elution Conditions

Product No: P 1617 Plate Enrichment - HPLC Table 1 Elution Conditions Elution Solutions Comments 0.2 M sodium phosphate, pH 8.4 Provides competitive displacement. Requires salt removal for MALDI-TOF-MS. 0.15 to 0.4 M ammonium hydroxide Provides significant recovery of phosphocompounds. Compatible wi...

Detect Pyrrolizidine Alkaloid Contamination in Food

We recently added the portfolio of phytochemical reference materials from PhytoLab to our global product offering. As one of the leading manufacturers internationally, PhytoLab offers over 1,000 extensively documented herbal reference substances of all classes of natural compounds. The portfolio als...

Elution Selectivity Maldi Ms

Product No: P 1617 Plate Elution Selectivity - MALDI-MS Figure 4. MALDI mass spectra of A) Crude ß-casein tryptic digest (4.5 pmol/5L) prior to loading on the PHOS-Select Plate and B)-E) purified phosphopeptides after elution from the PHOS-Select Plate under various elution conditions. Eluents are a...

Supercritical Fluid Chromatography (SFC)

Supercritical fluid chromatography (SFC) is a chromatographic technique that uses a supercritical fluid such as carbon dioxide as the mobile phase. Typical applications are similar to normal phase HPLC, but with the benefit of not using high levels of organic solvents. Because it is easy to remove t...

Foodborne Pesticide Analysis: Going Beyond the Dirty Dozen

Products for Pesticide Analysis • Full portfolio list of PESTANALⓇ and TraceCERTⓇ standards and CRMs • Pesticide Certified Reference Materials for Chromatography ( neats) • Labeled Pesticide Reference Materials • Sample preparation (QuEChERS & SPE, SPME) • Columns for HPLC & Gas Chromatography and M...

Snap-N-Spike® reference solutions of 25-Hydroxyvitamin D

Over the last decade, vitamin D testing has increased significantly in the clinical laboratory setting as research studies have linked vitamin D deficiency to numerous diseases from diabetes, heart disease, and multiple sclerosis to some cancers.1 Clinical diagnosis and treatment of vitamin D defici...

Trypsin In-Gel

• Main Page • Purification & Enrichment • Protein Deglycosylation Featured Products • Additional Products for Glycoprotein Analysis • Additional Products for Phosphoprotein Analysis • Trypsin In-Gel Digest Kit • Phosphatase Inhibitor Cocktails • Chart of mass changes resulting from typical post-tran...

Glycoprotein Analysis

• Main Page • Purification & Enrichment • Protein Deglycosylation Featured Products • Additional Products for Glycoprotein Analysis • Additional Products for Phosphoprotein Analysis • Trypsin In-Gel Digest Kit • Phosphatase Inhibitor Cocktails • Chart of mass changes resulting from typical post-tran...

Reference Materials for Extractables and Leachables Testing

Analytix Reporter Issue 6 | 2019 Related Products • View Product List • Extractables and Leachables Reference Materials • U/HPLC Columns • GC Columns for Pharma Applications • Nonsterile Millex® Syringe Filters Related Links • Reference Materials for the Pharma Industry Related Articles • LC-MS Ioni...

Enzyme Cofactor Index

Sigma offers a broad selection of high quality enzyme cofactors. You will find them in the following categories: Acyl Transfer Reagents Oxidation-Reduction Phosphate Donors Other Cofactors Acyl Transfer Reagents Product Name Product # Acetoacetyl coenzyme A trisodium salt trihydrate, 90-95% A1625 Ac...

A New Approach for the Detection of Acidic Pesticides in Water by MS

Increasing the Sensitivity in Pesticide Analysis by Paired-Ion ESI Detection In previous publications, di- and tri-cationic ion-pair reagents were used to detect inorganic compounds, such as chlorides and sulfates [1-2]. A recent publication by C. Xu et al [3] demonstrates the versatility of such io...

Evaluation of LC-MS MS Scrambling Ratios for Deuterium-Labeled Vitamin D Metabolites Steroids and Other Compounds of Clinical Significance

Introduction and Objective: A significant clinical challenge with LC-MS/MS is the potential for matrix effects that cause interferences or impact ionization efficiency. Stable isotope-labeled internal standards are frequently used to compensate for matrix effects and to increase the accuracy of quan...

Filtration in Dissolution Testing: Improving Throughput and Reducing Variability

In vitro dissolution testing is used to characterize drug compounds throughout their development. In early drug development it is used to support the choice of a particular formulation. During drug production it is a critical component of the quality control process and is used to assess the changes...

Protein Chromatography - affinity, gel filtration, anion exchange, cation exchange & HPLC products

For decades, liquid chromatography has been a powerful tool for isolating proteins, peptides, and other molecules from complex mixtures. Through our broad chromatography offerings in affinity chromatography, gel filtration chromatography, anion exchange chromatography, cation exchange chromatography...

Improve Analysis of Pesticides in Oranges

Although pesticides have proven to be invaluable in crop control, the same toxicity, stability, and mobility that enables them to effectively kill insects causes detrimental effects in humans and the environment1. Worldwide pesticide use in modern agriculture has led to the manifestation of pesticid...

Acrylamide in Food: Kits, columns and tubes for sensitive GC-MS and LC-MS analyses and solid phase extraction

Rainer Walz PhD, Product Manager An Trinh, Product Manager, Supelco Acrylamide is a commonly analyzed food-borne carcinogen. Sigma-Aldrich has convenient kits, LC and GC columns and sample prep methods for fast and reliable analysis of acrylamide by both analytical techniques. Acrylamide analysis ha...

Evaluation of LCMSMS Deuterium Scrambling in Clinically Significant Small Molecules

Introduction and Objective LC-MS/MS is a powerful tool that brings numerous benefits to the clinical sample analysis arena. However, due to the complexity of the instrumentation there are some unique challenges that also accompany these benefits. Even following sample extraction and cleanup, matrix ...

Accelerate Your API Purification Scale-Up

Contact SAFC • Contract Manufacturing Inquiries • • Download PDF • Simulated Moving Bed (SMB) chromatography combines the advantages of high yields, high purity and accelerated scale-up for clinical to commercial-scale API purification. This chiral chromatography based technology works at the molecu...

Separation of Steviol Glycosides by HPTLC: Introducing a New Stevia Extract Reference Material

Download the flyer Analytix Reporter Issue 6 | 2019 Related Products • View Product List • Stevia Standards • Phytochemical Reference Materials • Sweetener Standards Related Articles • Profiling of Stevia rebaudiana Extract by Accurate Mass Using HILIC and Reversed-Phase Chromatography (Reporter 27....

radiello® Diffusive Air Sampling Applications - Aldehydes

radiello Table of Contents Blue diffusive body Product No. RAD1201 Supporting plate Product No. RAD121 Vertical adapter Product No. RAD122 (optional) Chemiadsorbing cartridge Product No. RAD165 Filtration kit Product No. RAD174 (only for analysis) Cartridge RAD165 is a stainless steel net cartridge ...

New Lab Start-Up Product Savings

Sigma-Aldrich New Lab Start-Up Program – Product Savings With the Sigma-Aldrich New Lab Start Up Program, you will receive: Savings on Essential Life Science Products Cell Culture Discounts (up to) Liquid Media* 50%* Powdered Media 20% Antibiotics 15% Growth Factors 10% Reagents 20% PCR Reagents Dis...

Analysis of Alkylphenols and Alkylphenol Ethoxylates Using new 13C-Labeled and Deuterated Internal Standards According to ISO 18857-2

• • Download PDF • Olaf P. Heemken, Member of ISO/DIN working group “Phenols with GC,” Olaf.Heemken@hanse-analytics.de Nicole Amann, Product Manager Analytical Standards, Sigma-Aldrich Sigma-Aldrich offers these useful isotopically labeled compounds for GC-MS and LC-MS applications Alkylphenols are ...

Determination of Hydrocortisone from Topical Cream Using Discovery DSC-Si SPE and Reversed-Phase HPLC-UV

Related Products • Discovery DSC-Si SPE Products Related Articles • Parabens in Topical Preparations Using SPME-GC-MS Hydrocortisone (Figure A) is a steroid hormone secreted by the adrenal cortex and synthesized for medicinal use. It is a moderately polar compound that contains a glucocorticoid stru...

Rapid Separation of Anthocyanins and Flavonol Glycosides Utilising Discovery® DSC-MCAX Solid Phase Extraction

• • Download PDF • Contributed Article Rockhurst University, Kansas City, MO, USA About Flavanols and Anthocyanins Flavonols and anthocyanins are water-soluble vacuolar flavonoid compounds that are synthesized by organisms of the plant kingdom. Flavonoids are widely distributed in plants fulfilling ...

Astec CYCLOBOND™ Chiral HPLC Columns

Astec Products | Technical Resources | Bibliography Frequently Asked Questions - over 60 topics to assist you with chiral chromatography! CYCLODEXTRIN Stationary Phases for Chiral Separations and Highly Selective Achiral Separations CYCLOBOND is the name given to Astec technology for bonding cyclode...

Purer Fmocs Means Purer Peptides

All peptide chemists recognize the key to obtaining high purity peptides is to maximize efficiency of every synthetic step. However, not everyone realizes that obtaining high purity peptides also depends on using starting materials of the highest quality - small improvements in starting material qua...

Astec CHIRALDEX capillary GC columns for Analytical/Chromatography research.

Astec Products | Technical Resources | Bibliography Ordering Information Frequently Asked Questions - over 60 topics to assist you with chiral chromatography! Chiral GC Columns Brochure View (2Mb) / Request Astec CHIRALDEX capillary GC columns incorporate phases consisting of derivatives of α-, β-, ...

Liquid Chromatography & HPLC Literature from Supelco

General HPLC/LC Information Ascentis® Ascentis® Express Discovery™ Supelcogel™ TSKgel® Supelcosil™ See also: Ascentis® Express Technical Resources Ascentis® Applications Library Chiral Chromatography Learning Center Download PDF Subject Type No. of Pages General HPLC/LC Information back to top T7941...

Customized Products for Organic Synthesis

With MyChemicals choose from over 50,000 chemicals for organic synthesis. But this is really just the beginning. On your request, we customize our standard catalog chemicals in order to meet your exact requirements. 1. MyChemicals: Select from an extensive portfolio of more than 5.000 building block...