Comparison of Gastric versus Gastrointestinal PBET Extractions for Estimating Oral Bioaccessibility of Metals in House Dust

Boros, Kristina; Fortin, Danielle; Jayawardene, Innocent; Chénier, Marc; Levesque, Christine; Rasmussen, Pat E.

doi:10.3390/ijerph14010092

Submit to this Journal Review for this Journal Edit a Special Issue

Article Menu

...

Open AccessArticle

Comparison of Gastric versus Gastrointestinal PBET Extractions for Estimating Oral Bioaccessibility of Metals in House Dust

^1,2,

²,

¹,

and

^1,2,*

Environmental Health Science and Research Bureau, HECSB, Health Canada, 50 Colombine Driveway, Tunney’s Pasture 0803C, Ottawa, ON K1A 0K9, Canada

Department of Earth and Environmental Sciences, University of Ottawa, 25 Templeton St., Ottawa, ON K1N 6N5, Canada

Author to whom correspondence should be addressed.

Academic Editor: Jose A. Centeno

Int. J. Environ. Res. Public Health 2017, 14(1), 92; https://doi.org/10.3390/ijerph14010092

Received: 24 November 2016 / Revised: 23 December 2016 / Accepted: 13 January 2017 / Published: 18 January 2017

(This article belongs to the Special Issue Proceedings from the 3rd International Symposium on Environment and Health)

View Full-Text Download PDF

Browse Figures

Citation Export

Abstract

Oral bioaccessibility estimates for six metals which are prevalent as contaminants in Canada (zinc, lead, cadmium, copper, nickel, and chromium) are investigated for house dust using the simple gastric phase versus the two-phase physiologically-based extraction technique (PBET). The purpose is to determine whether a complete gastrointestinal (GI) assay yields a more conservative (i.e., higher) estimate of metal bioaccessibility in house dust than the gastric phase alone (G-alone). The study samples include household vacuum dust collected from 33 homes in Montreal, Canada, plus four certified reference materials (NIST 2583, NIST 2584, NIST 2710 and NIST 2710a). Results indicate that percent bioaccessibilities obtained using G-alone are generally greater than or equivalent to those obtained using the complete GI simulation for the six studied metals in house dust. Median bioaccessibilities for G-alone/GI in household vacuum dust samples (n = 33) are 76.9%/19.5% for zinc, 50.4%/6.2% for lead, 70.0%/22.4% for cadmium, 33.9%/30.5% for copper and 28.5%/20.7% for nickel. Bioaccessible chromium is above the detection limit in only four out of 33 samples, for which G-alone results are not significantly different from GI results (p = 0.39). It is concluded that, for the six studied metals, a simple G-alone extraction provides a conservative and cost-effective approach for estimating oral bioaccessibility of metals in house dust. View Full-Text

Keywords: metals; in vitro bioaccessibility; gastric; gastrointestinal; indoor environments; exposure assessment; house dust

▼ Show Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Share and Cite

MDPI and ACS Style

Boros, K.; Fortin, D.; Jayawardene, I.; Chénier, M.; Levesque, C.; Rasmussen, P.E. Comparison of Gastric versus Gastrointestinal PBET Extractions for Estimating Oral Bioaccessibility of Metals in House Dust. Int. J. Environ. Res. Public Health 2017, 14, 92. https://doi.org/10.3390/ijerph14010092

AMA Style

Boros K, Fortin D, Jayawardene I, Chénier M, Levesque C, Rasmussen PE. Comparison of Gastric versus Gastrointestinal PBET Extractions for Estimating Oral Bioaccessibility of Metals in House Dust. International Journal of Environmental Research and Public Health. 2017; 14(1):92. https://doi.org/10.3390/ijerph14010092

Chicago/Turabian Style

Boros, Kristina, Danielle Fortin, Innocent Jayawardene, Marc Chénier, Christine Levesque, and Pat E. Rasmussen. 2017. "Comparison of Gastric versus Gastrointestinal PBET Extractions for Estimating Oral Bioaccessibility of Metals in House Dust" International Journal of Environmental Research and Public Health 14, no. 1: 92. https://doi.org/10.3390/ijerph14010092

Find Other Styles

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Abstract views Pdf views Html views

Article Menu

Comparison of Gastric versus Gastrointestinal PBET Extractions for Estimating Oral Bioaccessibility of Metals in House Dust

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Article Access Map by Country/Region

Further Information

Guidelines

MDPI Initiatives

Follow MDPI