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Comprehensive Analysis of Aroma Compounds Released from Incense Sticks using TD–GC/MS

4 Aug 2014

This application note describes the analysis of VOCs released from incense sticks (agarbatti) using three sampling methods – a Micro-Chamber/Thermal Extractor™ for comprehensive analysis, pumped in-room sampling, and an Easy-VOC™ grab-sampler for robust sampling in challenging environments.

Micro-Chamber/Thermal Extractor

Markes International Ltd

  Fast sampling of emissions from products and materials. The Micro-Chamber/Thermal Extractor™ (µ-CTE™) is a versatile and compact unit with up to six small cylindrical chambers that enables the sampling of chemicals released from products or materials. Released volatile and semi-volatile organic compounds (VOCs and SVOCs) are collected onto sorbent tubes for analysis by TD–GC–MS. The capability of the Micro-Chamber/Thermal Extractor has been further extended by the release of the Humidifier Accessory, which supplies the Micro-Chamber/Thermal Extractor with air or gas at up to 50% relative humidity.   Features: The four-chamber model has a chamber volume of 114 mL and a maximum temperature of 250°C The six-chamber model has a chamber volume of 44 mL and a maximum temperature of 120°C Volatiles are collected on sorbent tubes for analysis by TD–GC–MS; also compatible with DNPH cartridges for formaldehyde monitoring No sample preparation needed – simply place the material in the chamber A constant flow of heated air or gas ensures rapid production of a representative VOC/SVOC profile Results can be correlated with longer-term reference methods Construction from inert-coated stainless steel – compatibility with reactive or thermally labile chemicals Accessories allow surface-only sampling or permeation testing  An optional humidifier accessory (available for both models of microchamber) supplies air/gas at up to 50% relative humidity to allow closer simulation of conditions used in reference tests and to enhance the recovery of some less-volatile polar compounds   Benefits: Save time and money by minimising the need for third-party reference tests Convienient and fast – test multiple samples in minutes, not days, for efficient quality control Confidence in results – Data from the Micro-Chamber/Thermal Extractor has been shown to correlate with longer-term reference-test results Avoid tedious and time-consuming sample preparation – simply place your sample in the microchamber Complies with international standard methods ISO 12219-3 (interior air of road vehicles) and ASTM D7706 (rapid screening of VOC emissions from products) Peace-of-mind – you are buying a quality product from the recognised leader in thermal desorption instrumentation   Applications: RMicro-Chamber/Thermal Extractor analysing Rapid emissions screening of materials used indoors and in vehicles, especially to aid compliance with regulations and safety labels Product R&D and formulation of lower-emitting products Testing of raw materials and production-line quality control Comparison with competitors’ products Testing permeation of vapours through materials Aroma profiling of foods or fragranced materials  

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Easy-VOC

Markes International Ltd

Grab-sampler for air sampling. Easy-VOC is a hand-held device that facilitates the rapid ‘grab’ sample collection of small volumes (<500 mL) of air directly onto sorbent tubes without the need for calibrated pumps.Sorbent tubes attach to the end of the Easy-VOC and air/gas is drawn directly onto the tube. Easy-VOC regulates the flow rate independent of the force used to pull the air through.Grab sampling involves collecting volumes of air or gas over a very short period of time. Sampling onto sorbent tubes in this manner offers many advantages over other methods, which can be cumbersome, expensive and inaccurate.Features & Benefits: Easy grab sampling onto sorbent tubes No pump to calibrate 50–500 mL volumes More versatile alternative to canister sampling - compatible with n-C3 to n-C32 Fits ¼-inch and 6 mm o.d. sorbent tubes

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Gas ChromatographyGas chromatography (GC) is an analytical technique used to separate and quantitate mixtures of small and volatile compounds. Gas chromatographs or GC systems include components such as GC columns, detectors, pumps and autosamplers. Choose from packed or capillary GC columns, flame ionization (FID), photoionization (PID) electron capture detectors and selective or non-selective detectors. Find the best gas chromatographs in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Gas Generators and AnalyzersGas generators are used for supplying or monitoring a regular flow of a high purity gas such as nitrogen, hydrogen or zero air for applications such as gas chromatography. Gas analyzers can be used in supply chain processes and laboratory experiments with portable analyzers for monitoring CO<sub>2</sub> and O<sub>2</sub> levels as well as trace gases. Regular flow can be produced with gas control modules and flow meters. Find the best gas generators and analyzers in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.GC-MS GC-MS (gas chromatography-mass spectrometry) instruments and equipment are used to separate, quantify and identify mixtures of small and volatile compounds, such as polycyclic aromatics, fatty acids and alcohols. Often used in drug detection, forensic investigation and environmental analysis for pesticides and contaminants, GC-MS is a powerful addition to your lab’s analytical capabilities. GC-MS/MS instruments equipped with a qTOF or triple quadrupole analyzers can give greater sensitivity and resolution to your analysis. Find the best GC-MS instruments and equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Volatile Organic Compounds (VOCs)Volatile organic compounds (VOCs) are chemicals that have a low boiling point. Some VOCs are harmful to human health, whereas others can be used to determine the shelf-life of foods samples. Aroma Profiling