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Sorptive process and breakthrough behavior of odorous volatile compounds on inert surfaces.

ABSTRACT: The use of glass impinger is an important device for sampling and handling when measuring volatile organic compounds (SVOCs). Thus, it is important to check for possible analyte losses to the inner glass surface when carrying out sample analysis with the aid of impinger system. In this research, we evaluated the sorptive loss patterns of vapor-phase semi-volatile organic compounds [SVOCs (n?=?10): acetic acid (ACA), propionic acid (PPA), i-butyric acid (IBA), n-butyric acid (BTA), i-valeric acid (IVA), n-valeric acid (VLA), phenol (PhAl), p-cresol (p-C), indole (ID), and skatole (SK)] on inert surfaces of an impinger in reference to sampling bags. The gaseous standard of these SVOCs (48-406 ppb) in polyester aluminum (PEA) bags was passed through an empty impinger in 1?L steps. The exiting SVOCs were collected on three-bed sorbent tubes for subsequent analysis by thermal desorption-gas chromatography-mass spectroscopy (TD-GC-MS). Impinger wall sorption capacities ranged from 2.0 to 21.0?ng?cm-2. The 10% breakthrough adsorption capacities on the impinger wall for acids, phenols, and indoles ranged from 1.21?±?0.15 to 5.39?±?0.79, 0.92?±?0.12 to 13.4?±?2.25, and 4.47?±?0.42 to 5.23?±?0.35?ng?cm-2, respectively. The observed sorptive patterns suggest that the sorptive losses of the volatile fatty acids, phenols, and indoles can occur very effectively at low ppb levels onto a glass surface.

SUBMITTER: Ahmed E

PROVIDER: S-EPMC6120927 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Sorptive process and breakthrough behavior of odorous volatile compounds on inert surfaces.

Ahmed Ezaz E Szulejko Jan E JE Adelodun Adedeji A AA Bhattacharya Satya Sundar SS Jeon Byong Hun BH Kumar Sandeep S Kim Ki-Hyun KH

Scientific reports 20180903 1

The use of glass impinger is an important device for sampling and handling when measuring volatile organic compounds (SVOCs). Thus, it is important to check for possible analyte losses to the inner glass surface when carrying out sample analysis with the aid of impinger system. In this research, we evaluated the sorptive loss patterns of vapor-phase semi-volatile organic compounds [SVOCs (n = 10): acetic acid (ACA), propionic acid (PPA), i-butyric acid (IBA), n-butyric acid (BTA), i-valeric acid ...[more]

PMID: 30177843

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Project description:BackgroundThe B/B Checker®, a new portable device for detecting odorous compounds in oral, exhaled, and nasal air, is now available. As a single unit, this device is capable of detecting several kinds of gases mixed with volatile sulfur compounds (VSC) in addition to other odorous gasses. The purpose of the present study was to evaluate the effectiveness of the B/B Checker® for detecting the malodor level of oral, exhaled, and nasal air.MethodsA total of 30 healthy, non-smoking volunteers (16 males and 14 females) participated in this study. The malodor levels in oral, exhaled, and nasal air were measured using the B/B Checker® and by organoleptic test (OT) scores. The VSCs in each air were also measured by gas chromatography (GC). Associations among B/B Checker® measurements, OT scores and VSC levels were analyzed using Spearman correlation coefficients. In order to determine the appropriate B/B Checker® level for screening subjects with malodor, sensitivity and specificity were calculated using OT scores as an identifier for diagnosing oral malodor.ResultsIn oral and nasal air, the total VSC levels measured by GC significantly correlated to that measured by the B/B Checker®. Significant correlation was observed between the results of OT scores and the B/B Checker® measurements in oral (r = 0.892, p < 0.001), exhaled (r = 0.748, p < 0.001) and nasal air (r = 0.534, p < 0.001). The correlation between the OT scores and VSC levels was significant only for oral air (r = 0.790, p < 0.001) and nasal air (r = 0.431, p = 0.002); not for exhaled air (r = 0.310, p = 0.096). When the screening level of the B/B Checker® was set to 50.0 for oral air, the sensitivity and specificity were 1.00 and 0.90, respectively. On the other hand, the screening level of the B/B Checker® was set to 60.0 for exhaled air, the sensitivity and specificity were 0.82 and 1.00, respectively.ConclusionThe B/B Checker® is useful for objective evaluation of malodor in oral, exhaled and nasal air and for screening subjects with halitosis.Trial registrationClinicalTrials.gov: NCT01139073.

Dataset Information

Sorptive process and breakthrough behavior of odorous volatile compounds on inert surfaces.

Publications

Sorptive process and breakthrough behavior of odorous volatile compounds on inert surfaces.

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