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Showing 1-30 of 96 results

Extraction of Permethrin Pesticides from Spinach Using QuEChERS Methodology with Automated Shaking

GC/MS/MS Analysis of Bisphenol A (BPA) in a Fruit Flavored Energy Drink on the SLB-PAHms Column After SPME Using an Overcoated SPME Fiber

Bisphenol A (BPA) plastic is controversial in food and beverage containers. This study demonstrates SPME of BPA from an energy drink using an overcoated PDMS/DVB fiber, followed by GC/MS/MS analysis using SLB-PAHms GC Column.

Derivatization Agents for LC/MS – An Improved Detection of Estradiol with ESI-MS

Improved LC/MS Detection of Estradiol using 4-(Dimethylamino) benzoyl chloride (DMABC) derivatization agent relative to dansyl chloride.

APPI Dopants - Solvents and Post-Column Additives for Photo-Ionization

We presents an article concerning APPI Dopants - Solvents and post-column additives for photo-ionization.

Hopane Reference Standards for use as Petrochemical Biomarkers in Oil Field Remediation and Spill Analysis

We provide high-quality, relevant hopane reference standards to be used as biomarkers for petrochemical oil field remediation and spill analysis.

Synthesis & Characterization of ±-threo-Ritalinic Acid-D₁₀ Hydrochloride

Methylphenidate belongs to the group of medicines called central nervous system (CNS) stimulants and is used to treat attention deficit hyperactivity disorder (ADHD).

Analysis of California Cannabis List of Pesticides, Mycotoxins, and Pyrethrins Using Ascentis® Express Biphenyl Column

Cannabis testing regulations include analysis of purity, potency, and contaminants. Learn more about analysis of cannabis for pesticides, mycotoxins, and pyrethrins registered in California using Ascentis® Express Biphenyl

Complete Workflow for the Analysis of California List of Pesticides in Cannabis by LC-MS/MS and GC-MS/MS

To show product safety, it is mandatory to test cannabis flowers for the presence of pesticides. In this article, we show a complete workflow for sample preparation and analysis of cannabis for the pesticides registered in California, by LC-MS/MS and

Extraction of Nitroimidazoles from Milk and Eggs using Molecularly Imprinted Polymers

In this report, SupelMIP SPE – Nitroimidazoles was evaluated for the extraction of nitroimidazoles and metabolites from milk and egg.

Aminoglycoside Analysis in Pork Muscle using Molecularly Imprinted Polymer Cleanup and LC/MS/MS Detection

Extraction and quantitative analysis of aminoglycosides in porcine tissue, using molecular imprinted polymer solid phase extraction followed by LC-MS/MS.

Improve Pigment Removal and Decrease Matrix Interferences for Pesticide Determination in Oranges Using Supel QuE Z-Sep/C18 QuEChERS Sorbent

The comparison of Supel™ QuE Z-Sep/C18, PSA/C18, and PSA QuEChERS sorbents, in terms of color removal and analyte recovery, is described for the cleanup of oranges prior to pesticide analysis.

New Certified Reference Materials for α‑Lactalbumin, β‑Lactoglobulin A & B, and Lactoferrin

We have developed Certified Reference Materials (CRMs) of fully intact milk proteins that allow accurate testing of the most critical proteins in infant formula; help labs to develop and test infant formula products with high accuracy, while ensuring legal and

Two Distinct Sample Prep Approaches to Overcome Matrix Effect in LC/MS of Serum or Plasma Samples

This article highlights the impact that sample matrix effects can have on LC/MS response and discusses two novel approaches to reduce it.

Supel™-Select Polymeric SPE

Supel-Select HLB SPE - a hydrophilic modified styrene based polymer developed for the solid phase extraction of a broad range of compounds from aqueous samples.

Chiral and Achiral LC-MS Analysis of Warfarin™ in Plasma Samples

Clinical laboratories are beginning to reap the benefits of LC-MS in terms of its sensitivity, specificity, throughput, and potential to reduce cost per sample. The purpose of this study was to demonstrate the LC-MS analysis of Warfarin in plasma samples

Investigating Matrix Interference in Analysis of Antiarrhythmic Cardiac Drugs in Plasma

For efficient therapeutic drug monitoring, it is important for clinicians to have access to fast and robust analytical methods for accurate assessment of drug efficacy. Industrial trends toward highly specific LC/MS applications over traditional immunoassay have resulted in the need

Vitamin D epi-Metabolites Separated with HybridSPE-Phospholipid

This Sigma-Aldrich article continues to detail new methodology for the analysis of Vitamin D metabolites using HybridSPE-Phospholipid technology.

Improvement in LC/MS Analysis of Vitamin D Metabolites in Serum by Leveraging Column Selectivity and Effective Sample Prep

The Extraction of Amphetamine and Related Drugs using Molecularly Imprinted Polymer SPE

Bioanalytical Microsampling Using Biocompatible SPME and Benefits Over Dried Blood Spots

This study compares the use of SPME LC Tips to dried blood spots (DBS) in terms of extraction efficiency and detection limits of target analytes from whole blood.

Supel-Select HLB SPE for Pharmaceutical Analysis

Select HLB SPE is a hydrophilic polymer phase for analyte extraction from aqueous matrices. Here it’s used for statins in plasma and 48 pharmaceutical analytes in drinking water.

Bioanalysis with SPME

Biocompatible SPME devices employ C18 bonded porous silica sorbent particles, in a binder which resists fouling by biological matrix components

Analysis of Tetrahydrocannabinol (THC) and Carboxytetrahydrocannabinol (THCCOOH) in Surface Waters by SPME and GC/MS

Comparison of QuEChERS Products for the Extraction of Planar Pesticides from Spinach

Supel™ QuE Verde combines a novel carbon with zirconia coated silica (Z-Sep+) to provide an optimum balance between planar pesticide recovery and color removal.

Improved GC/MS Derivatization Techniques for Analysis of New Designer Drugs: Methylone, Ethylone, Butylone, Mephedrone, and Methedrone

As new “bath salt” drugs such as methylone, ethylone, mephedrone, butylone and other methcathinone analogs increase in popularity, toxicologists require native and labeled certified reference materials to accurately identify and quantify the new compounds in patient samples.

Silylation of Non-Steroidal Anti-Inflammatory Drugs

Results of a study involving the ability few Fluka silylating reagents to form GC-MS-compatible trimethylsilylmethyl derivatives of NSAIDs

Melamine Analysis via GC-MS

Sigma-Aldrich presents an article about the analysis of melamine and related compounds in dog food with the use of more economical gas chromatography-mass spectrometry (GC-MS) instrumentation.

Resolving by Mass

Mass Spectrometry

What is Mass Spectrometry or MS? What is it used for and how does it work? Read this detailed article with diagrams and example graphs to understand how to use mass spec in your research.

The Derivatization and Analysis of Amino Acids by GC-MS

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