Gas chromatography mass spectrometry techniques including GCMS, Pyrolysis, GC-QTOF MS measure components in compounds to low ppm and ultra-trace levels Intertek GCMS laboratories provide an extensive range of gas chromatography mass spectroscopy analytical instrumentation and expertise for client testing and research projects.
using high-temperature headspace gas chromatography−mass spectrometry, with glycerol used as a headspace solvent. Validated method recoveries were 75−103%, with excellent repeatability (relative standard deviation (RSD) < 5%) and intermediate precision (RSD < 12%).
Aug 01, 2016 · The two most common methods for potency analysis are high-performance liquid chromatography (HPLC) with UV detection and gas chromatography (GC) with flame ionization detection (FID) (Table 1). Although GC is more cost-effective and simpler than HPLC, this method requires sample derivatization to quantitate both the free and acid forms of THC
This research was undertaken because of the need to develop an objective method for quality control of milk. A major problem in the dairy industry is off-flavour often found in milk. Quality control of milk is heavily dependent upon sensory evaluations supported by microbiological and chemical analyses. The chief purpose of this research was to demonstrate a simple and economical system for
Headspace Gas Chromatography. Headspace gas chromatography connected to an FID and/or an MS detector can be applied to obtain better precision and accuracy for the quantitative analysis of volatile organic compounds (VOCs) in bio-oils including light aldehydes and ketones, ethers, esters, alcohols, carboxylic acids and aromatic compounds [32,49].
Current Analytical Chemistry, 2005, 1, 79-83 79 Some Recent Developments in Headspace Gas Chromatography J. Y. Zhu* ,1 and X.-S. Chai 2 1 USDA Forest Service, Forest Products Laboratory, One Gifford Pinchot Drive, Madison, WI 53726-2398, USA
Our Chromatography department has offered a wide range of services for over 30 years, including traditional thin layer chromatography as well as more modern gas and liquid chromatography techniques. Our analysts can tailor methodology, as well as offer compendial or client method testing services, to provide high quality analysis of various material types to meet []
Jan 01, 2002 · Headspace gas chromatography (GC) is a sample preparation method for determining volatile compounds in solid and liquid samples. The popularity of headspace analysis is due to its simplicity and the fact that it is a very clean method of introducing volatile analytes into a GC—the injector system and column should require virtually no maintenance.
After a brief overview of the techniques of static and dynamic headspace sampling and examples are given for the dynamic method (“purge and trap”). With respect to static headspace—gas chromatography (HS-GC) the theoretical background of the technique and the principles of the existing instruments are outlined.
Identification of volatile degradation products from Baltic amber by headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry. Pastorelli G(1), Glastrup J. Author information: (1)School of Conservation, Royal Danish Academy of Fine Arts, Esplanaden 34, 1263 Copenhagen K, Denmark. g.pastorelli@ucl.ac.uk
Mar 21, 2021 · Gas chromatography (GC) is a very commonly used chromatography in analytic chemistry for separating and analyzing compounds that are gaseous or can be vaporized without decomposition. Because of its simplicity, sensitivity, and effectiveness in separating components of mixtures, gas chromatography is an important tools in chemistry.
Mar 04, 2018 · These methods include high performance liquid chromatography (HPLC), headspace gas chromatography- vacuum ultraviolet spectroscopy (HS-GC-VUV), and headspace gas chromatography-mass spectrometry
Formaldehyde is a highly reactive impurity that can be found in many pharmaceutical excipients. Trace levels of this impurity may affect drug product stability, safety, efficacy, and performance. A static headspace gas chromatographic method was developed and validated to determine formaldehyde in pharmaceutical excipients after an effective derivatization procedure using acidified ethanol
Jan 21, 2019 · Caps are made of high quality laquered aluminum, 0.010" thick. Cap colors are available in silver only. 10ml headspace vials. Many septa options are available and use only the highest quality materials to ensure proper function and can be pre-slit to ease needle penetration. 0.120" Natural Silicone with 0.005" Natural PTFE.
An Introduction to Headspace Sampling in Gas Chromatography Introduction This document is intended to provide the newcomer to headspace sampling with a concise summary of the theory and principles of this exciting technique.
