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Persistent organic pollutants (POPs) and metals in primiparous women: a comparison from Canada and Mexico.

The Science of the total environment (2014-09-19)
Bryan Adlard, Karelyn Davis, Chun Lei Liang, Meredith S Curren, Sandra Rodríguez-Dozal, Horacio Riojas-Rodríguez, Mauricio Hernández-Ávila, Warren Foster, Larry Needham, Lee-Yang Wong, Jean-Philippe Weber, Leonora Marro, Tara Leech, Jay Van Oostdam
ABSTRACT

Under the North American Commission for Environmental Cooperation (CEC) and its Sound Management of Chemicals (SMOC) program, a tri-national human contaminant monitoring initiative was completed to provide baseline exposure information for several environmental contaminants in Canada, Mexico and the United States (U.S). Blood samples were collected from primiparous women in Canada and Mexico, and were analysed for a suite of environmental contaminants including polychlorinated biphenyls (PCBs), dichlorodiphenyldichloroethylene(p,p'-DDE),beta-hexachlorocyclohexane (β-HCH), mercury and lead. A multiple stepwise linear regression analysis was conducted using data from Canadian and Mexican primiparous mothers, adjusting for ethnicity group, age, pre-pregnancy BMI, years at current city and ever-smoking status. Concentrations of p,p'-DDE, β-HCH, and lead were found to be higher among Mexican participants; however, concentrations of most PCBs among Mexican participants were similar to Canadian primiparous women after adjusting for covariates. Concentrations of total mercury were generally higher among Mexican primiparous women although this difference was smaller as age increased. This initial dataset can be used to determine priorities for future activities and to track progress in the management of the selected chemicals, both domestically and on a broader cooperative basis within North America.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Mercury, electronic grade, 99.9999% trace metals basis
Supelco
4,4′-DDMU, PESTANAL®, analytical standard
Supelco
4,4′-DDE, PESTANAL®, analytical standard
Sigma-Aldrich
Mercury, ≥99.99% trace metals basis
Sigma-Aldrich
Mercury, ACS reagent, 99.9995% trace metals basis
Supelco
p,p′-DDMU, analytical standard
Sigma-Aldrich
1,1-Dichloro-2,2-bis(4-chlorophenyl)ethene, 99%