Gas chromatography

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

GC Injection Port Issues: Two Case Studies (Peak Tailing and Low Response)

Proper product selection and preventative maintenance for the GC inlet are vital elements that impact performance of the GC instrument.

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.

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

The Best Approaches to Gas Purification

The Derivatization and Analysis of Amino Acids by GC-MS

Proline Derivatization and Enantioresolution by Chiral GC

Amino acids are building blocks of peptides and proteins. Enantiomeric separation of these molecules can be performed through chromatography by chiral stationary phases. This article describes the chiral GC analysis of one amino acid, proline, after achiral derivatization.

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.

Measuring Flows For Gas Chromatography Volumetric vs. Mass

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.

New cis/trans FAME Standard for Optimising GC System Performance

AOCS and AOAC methods for determining the trans fatty acid composition of foods by gas chromatography require the use of a highly polar cyanosilicone capillary column to provide the best peak resolution attainable of the numerous geometric (cis & trans)

GC Analysis of a 37-Component FAME Mix on Omegawax®

This technical article will discuss GC Analysis of a 37-Component FAME Mix on Omegawax.

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.

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

Exactly Why is Low Bleed Important for Capillary Columns?

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.

Solid Phase Microextraction: Frequently Asked Questions

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

Analysis of Pesticides in Turmeric Powder by LC/MS/MS and GC/MS/MS after Cleanup with Dual-Layer SPE Cartridge

Pesticide residue testing of turmeric and other (dried) spices is challenging due to their complex compositions and high matrix. An efficient SPE clean-up can be achieved by a new Dual-layer cartridge.

Validation of a Simple Method for the Alcohol Content in Kombucha Tea by Headspace SPME and GC-MS

Development and validation of a headspace SPME and GC-MS method to determine alcohol content in twenty different Kombucha tea samples.

Determination of 2-Chloroethanol as Marker for Fumigant Ethylene Oxide in Sesame Seeds by HS-SPME-GC-MS

The work describes the development of an HS-SPME-GC-MS method to determine 2-chloroethanol as a marker of fumigant ethylene oxide in different kinds of sesame seed 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

P-I-A-N-O Standards for Detailed Hydrocarbon Analyses

This is an article concerning P-I-A-N-O standards for detailed hydrocarbon analyses.

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.

The Utility of Headspace Grade Solvents for the Analysis of Organic Volatile Impurities

Analysis of Pesticides in Baby Food by Solid Phase Microextraction (SPME) Using a New Overcoated Fiber

A direct immersion SPME method using a new overcoated SPME fiber was developed for the extraction of pesticides from pureed prune baby food.

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 by LC-MS/MS and GC-MS/MS Using Ascentis® Express Biphenyl and SLB®-5ms Columns

Determination of N-Nitrosamines in Valsartan

Nitrosamines have been discovered as a serious contaminant group in active pharmaceutical ingredients (API) belonging to the sartan family. This article describes a GC-MS method for the determination of nitrosamines in Valsartan tablets according to US FDA guide lines that

Multiclass Pesticide Analysis of Soy Milk Using a Matrix-Compatible SPME Fiber

Pesticide analysis, SPME Fiber, supelco spme fiber, direct immersion spme, pesticide analysis methods, pesticide analysis by gc-ms, DI-SPME, overcoated SPME, overcoated fibers, soy milk analysis

A New Thermal Desorption Tube for Air Sampling of Cannabis Terpenes

Discover our new Carbotrap® T420 tube, designed for precise terpene air sampling in the cannabis and hemp industry. Monitor terpenes in cultivation environments, even in high humidity, with reproducible sample recovery. Elevate your analysis with the latest in terpene sampling

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