An Approach for Measuring the Sorptive Behavior of Odorants Using a Multifunction Thermal Desorber Unit: Preliminary Tests on Reduced Sulfur Compounds.

Ki-Hyun Kim,Sang-Woo Joo,Hye-Soon Yang,Ye-Jin Choi

doi:10.3390/s8031858

Ki-Hyun Kim, Sang-Woo Joo + Show 2 more

Open Access

https://doi.org/10.3390/s8031858

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Abstract

In this study, the sorptive behavior of reduced sulfur compounds (RSC) was investigated using a combination of thermal desorber (TD) unit and gas chromatography (GC). To examine the sorptive properties of RSC on textile materials, two types of experiments were conducted under experimental conditions favorable for sorptive processes. In all the experiments, gaseous standards of hydrogen sulfide, methanethiol, dimethyl sulfide, and dimethyl disulfide were supplied to initiate the adsorption processes on textile pieces. The textile pieces were then forced to release those adsorbed RSC under a fixed condition. It was found that the extent of adsorption, if evaluated quantitatively, occurred at approximately 1/1000 to 1/100 of the level of RSC standards supplied originally to induce adsorption. It also indicated that RSC adsorption was affected very sensitively by the initial exposure durations to induce RSC adsorption with an exponential decrease in relative recovery (RR) values with increasing exposure time. The relative sorptive patterns, when compared between different RSCs, were affected most sensitively by such factors as molecular weight and/or physical contact conditions.

Highlights

In everyday life we encounter a broad range of odorous compounds [1,2]
As clothing can be a good media for transferring odor problems, the sorptive process between odors and clothing materials is an intriguing subject in odor research
When the adsorption is induced, the actual amount of reduced sulfur compounds (RSC) remaining on the textile pieces is substantially reduced

Summary

Introduction

In everyday life we encounter a broad range of odorous compounds [1,2]. Considering the severity of odorous pollution and the problems associated with it, there has been an increasing amount of research directed toward several fields of analytical chemistry including chemical/electronical sensing and the molecular biology of olfaction [3,4,5]. While others such as tobacco and barbecue smoke [7] persist until the application of a deodorizing treatment or process Those who are exposed to such stimulating odors can act either directly or indirectly as the secondary sources. They are apt to release odors in other areas, as they move around. When the adsorption is induced, the actual amount of RSC remaining on the textile pieces (as the consequence of adsorption process) is substantially reduced. As there have been many studies to measure the transfer of odorous compounds with environmental surfaces and their memory effect with surface materials, information acquired by this preliminary study can be used to design and assess different methods for the control of odors

The basics of the Experimental Design

Experiment type IB

Analytical set-up for RSC quantification

The effect of changes in RSC desorption condition - Experiment type I

Conclusions