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Comparison of sampling bags used for measuring breath odor
Author(s) -
Hayashida A,
Hoshi K,
Sato Y,
Ito J,
Arai T,
Imai S,
Hanada N,
Uematsu H
Publication year - 2005
Publication title -
oral diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.953
H-Index - 87
eISSN - 1601-0825
pISSN - 1354-523X
DOI - 10.1111/j.1601-0825.2005.01105_47.x
Subject(s) - odor , plastic bag , polyester , electronic nose , hydrogen sulfide , humidity , dimethyl sulfide , methanethiol , materials science , chromatography , blisters , chemistry , pulp and paper industry , sulfur , composite material , organic chemistry , metallurgy , physics , thermodynamics , nanotechnology , engineering
The use of sampling bags to collect breath odor has not been well established. The aim of this study was to compare and judge the quality and performance of three commercially available sampling bags. An aluminized polyethylene bag (Aluminum Bag, Tokyo Deodorant Inc., Japan), the Tedlar ® bag (Tedlar ® Bag, Tokyo Deodorant Inc.), and a polyester bag (Flek‐Sampler ® Nioibukuro; Omi Odorair Service Co. Ltd., Japan) were assessed. A GC instrument (GC14‐B, Shimadzu, Japan) equipped with a flame photometric detection system were used to measure the concentrations of volatile sulfur compounds (VSC: hydrogen sulfide, methyl mercaptan, and dimethyl sulfide) released from the sampling bags over time. An electronic nose (e‐nose) (Odor Discrimination Analyzer FF‐1, Shimadzu, Japan) was used to assess the characteristics of the gas eluted from the inner surfaces of the bags. The GC results showed that the Tedlar ® bag had the highest performance, with 73% of the VSC concentration lasting for up to 4 days. The disadvantage of this bag, however, is that the Tedlar ® bag itself has an odor that disturbs the e‐nose's response and organoleptic evaluation. The polyester bags were only able to hold hydrogen sulfide for 2 h. The e‐nose's responses were strongly associated with changes in humidity within the polyester bag. The humidity was more stable within the aluminized polyethylene bag, which was able to sustain 94% of the VSC concentration for up to 24 h. In conclusion, Tedlar ® bags are beneficial for GC usage. Aluminum coated polyester bags are beneficial for GC measurements, e‐nose measurements, and organoleptic judgements. Polyester bags have poor hold of VSC, but the low cost suits required disposability for the measurements of individual patients. Thus, breath odor sampling bags should be selected based on the specificity of the measuring instrument.