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The Effect of Container Materials on Production of Light Induced Off-Flavors in Milk – A Study Using SPME-GC-MS

Various plastics used as barriers to the production of off-flavors in light exposed milk were examined using HS-SPME with a new Carboxen®/PDMS coated Nitinol fiber followed by GC-MS analysis allowing detection of low MW analytes at levels <1 ng/mL.

Achieve Exceptional Resolution of PAHs, Including Several Isomer Sets Using SLB®-ILPAH Capillary GC Columns

SLB®-ILPAH is a special purpose column based on an ionic liquid stationary phase providing unique selectivity and efficient column dimensions allowing exceptional resolution of PAHs

Selecting the Appropriate SPME Fiber Coating –Effect of Analyte Molecular Weight and Polarity

Analysis of Pesticide Residues in Cannabis Using QuEChERS Extraction and Cleanup Followed by GC/MS/MS Analysis

Compared to conventional PSA/C18/GCB cleanup, cannabis extracts cleaned with the Supel QuE Verde mixture showed lower GC/MS background, and better recoveries for many pesticides.

Resolves Difficult Sample Matrix Problems

In the flavor and fragrance industry, analytical chemists are often required to isolate key ingredients, off-flavor components, or trace organic compounds from their sample matrices without altering their structure or composition.

Petroleum Hydrocarbon Standards for SIMDIS Analyses

Understanding the boiling point range distribution of petrochemical products is critical for selection of the proper method to process feed stocks, for process control, for contaminant identification and for development of new test methods.

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

SPME Fiber Performance Tips for Volatiles & Semi-Volatiles

Enhance the extraction capability of Supelco SPME fibers for the collection of volatiles, semi-volatiles and polar compounds. spme

Method Validation for Determination of Chloramphenicol in Urine Using Molecularly Imprinted Polymer (MIP) SPE

The method for determination of low concentrations of chloramphenicol in bovine and porcine urine was developed. Sample cleanup was performed by Molecular Imprinted Polymer (MIP) columns. Confirmatory analyses were conducted using GC/MS-NCI after derivatisation (silylation). The described method was fully

SPME in the Analysis of Illicit Drugs

SPME is used in the analysis of amphetamine compounds by doing pre-extraction derivatization, and is also used in general determinations of other drugs of abuse.

Solid Phase Microextraction: Frequently Asked Questions

Answers and tips relating to the application of the solid phase micro-extraction technique.

Analysis of Fats (Fatty Acids, FAMEs, Glycerides) in Food and Beverages

This article explores the analysis of fats in food and beverage products. From derivatization of fatty acids to FAMEs, to analysis of FAME isomers, and more we are your one-stop shop for all of your food and beverage analysis needs.

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

Principal Component Analysis (PCA) Evaluation of Seven Commercial Ionic Liquid Capillary GC Columns

In order to cover a broad range of possible solute-stationary phase interactions, 95 solutes with varied functional groups were selected to perform stationary phase characterization.

GC Analysis of Class 3 Residual Solvents on OVI-G43

Butyl methyl ether; Acetic acid; 2-Butanone; Ethyl acetate; Tetrahydrofuran; 1-Butanol; Isopropyl acetate; Heptane; Propyl acetate; 3-Methylbutanol; 4-Methyl-2-pentanone; Isobutyl acetate; Butyl acetate; Dimethyl sulfoxide; Anisole; Cumene

HPLC Analysis of Active Cannabinoid Compounds in Gummy Bear Candy on Ascentis® Express Biphenyl with UV Detection after Extraction

Tetrahydrocannabinolic acid A solution, 1.0 mg/mL in acetonitrile, ampule of 1 mL, certified reference material.

SupraSolv® GC Solvent Specifications

Our GC solvents have been specially developed and tested for ECD, FID and MS detection or for headspace gas chromatography to ensure accurate, reliable and reproducible analytical results.

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.

GC Column Selection Guide

An optimized chromatographic separation begins with the column. Learn to select the proper capillary column based on stationary phase, column I.D., film thickness, and column length.

US EPA Method 8041: GC Analysis of Phenols on Equity®-5

Separation of 2-Chlorophenol; 2,4-Dichlorophenol; 2,4,6-Tribromophenol; 2,4,6-Trichlorophenol; 2,4-Dinitrophenol; Pentafluorophenol; 2-Methylphenol, analytical standard; 2,3,4,6-Tetrachlorophenol; Pentachlorophenol; 4-Nitrophenol; 2-Bromophenol; 2,3,5,6-Tetrachlorophenol; 2,3,5-Trichlorophenol; 4-Chloro-3-methylphenol; 2,4,5-Trichlorophenol; 4-Methylphenol, analytical standard; 2,4-Dimethylphenol; 2-Nitrophenol; 3-Methylphenol, analytical standard; Phenol; 2-Methyl-4,6-dinitrophenol; 2,3,4-Trichlorophenol; 2,6-Dichlorophenol; 2,3,4,5-Tetrachlorophenol

GC Analysis of C2-C7 Free Fatty Acids on Nukol™

Separation of Propionic acid; Acetic acid; Heptanoic acid; Isobutyric acid; Valeric acid; Isocaproic acid; Butyric acid; Isovaleric acid

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.

GC Analysis of Permanent Gases and Light Hydrocarbons on Carboxen-1006 PLOT and a Packed Column (Carboxen® 1004)

Separation of Methane; Acetylene; Carbon monoxide; Water; Nitrogen; Carbon dioxide; Ethane; Ethylene

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

The Use of Derivatization Reagents for GC

GC Analysis of Neroli Essential Oil on SLB®-5ms

Resolving by Mass

Biodiesel

Learn more about Biodiesel as a renewable, alternative diesel fuel produced from vegetable oils, animal fats, or recycled restaurant grease.

Separation of Alcohols and Esters in Spirits using Serially Connected GC Columns

GC Injection Port Septa: Use, Maintenance, Storage and Handling

Proper handling and preventative maintenance instructions for injection port septa; tips to improve the performance of gas chromatography instruments.

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