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Appears in Collections:Faculty of Health Sciences and Sport Journal Articles
Peer Review Status: Refereed
Title: A preliminary comparison of three dermal exposure sampling methods: rinses, wipes and cotton gloves
Author(s): Gorman Ng, Melanie
de Poot, Stan
Schmid, Kaspar
Cowie, Hilary
Semple, Sean
van Tongeren, Martie
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Issue Date: 1-Jan-2014
Citation: Gorman Ng M, de Poot S, Schmid K, Cowie H, Semple S & van Tongeren M (2014) A preliminary comparison of three dermal exposure sampling methods: rinses, wipes and cotton gloves, Environmental Science: Processes and Impacts, 16 (1), pp. 141-147.
Abstract: Several methods exist to estimate dermal exposure and it is unclear how comparable they are. These methods fall into three main categories: (i) removal techniques (such as wiping or rinsing); (ii) interception techniques (such as gloves, patches, or coveralls); and (iii) fluorescent tracer techniques. Controlled experiments were conducted to compare two removal methods for exposure to particulate, and a removal method with an interception method for exposure to liquids. Volunteers' hands were exposed to three liquid solutions (glycerol-water solutions of different concentrations) and three particulates (Epsom salts, calcium acetate and zinc oxide) in simulated exposure scenarios. Both hands were exposed and a different sampling method was used on each to allow comparison of methods. Cotton glove samplers and a cotton wipe sampling method were compared for exposure to liquids. For exposure to powders a cotton wipe sampling method was compared to rinsing the hands in deionised water. Wipe and rinse methods generally yielded similar results for Epsom salts and zinc oxide (geometric mean [GM] ratios of wipe-to-rinse measurements of 0.6 and 1.4, respectively) but they did not for calcium acetate (GM wipe-to-rinse ratio of 4.6). For glycerol solutions measurements from the glove samplers were consistently higher than wipe samples. At lower levels of exposure the relative difference between the two methods was greater than at higher levels. At a hand loading level of 24000 μg cm-2 (as measured by wiping) the glove-to-wipe ratio was 1.4 and at a hand loading of 0.09 μg cm-2 the ratio was 42.0. Wipe and rinse methods may be directly comparable but the relationship between glove and wipe sampling methods appears to be complex. Further research is necessary to enable conversion of exposure measurements from one metric to another, so as to facilitate more reliable risk assessment. © 2014 The Royal Society of Chemistry.
DOI Link: 10.1039/c3em00511a
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