Keywords:
DIETARY EXPOSURE, SURFACE TRANSFER EFFICIENCIES, PESTICIDE EXPOSURE, DIETARY MODEL, FOOD QUALITY PROTECTION ACT (FQPA),
Related Records:
PESTICIDE TRANSFER EFFICIENCY FROM HOUSEHOLD SURFACES TO FOODS
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DETERMINATION OF PESTICIDES IN COMPOSITE BEVERAGE SAMPLES
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UNDERSTANDING CHILDREN'S TOTAL DIETARY EXPOSURE TO PESTICIDES
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USE OF PHARMACOKINETIC MODELING TO DESIGN STUDIES FOR PATHWAY-SPECIFIC EXPOSURE MODEL EVALUATION
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TRANSFER EFFICIENCIES OF HOUSEHOLD PESTICIDES FROM SURFACES TO FOODS
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ESTIMATING EXCESS DIETARY EXPOSURES OF YOUNG CHILDREN
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PESTICIDE TRANSFER EFFICIENCIES FROM HOUSEHOLD SURFACES TO FOODS
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PESTICIDE RESIDUE RECOVERIES FROM SURFACE WIPES
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TRANSFER EFFICIENCES OF PESTICIDES FROM HOUSEHOLD CERAMIC TILE TO FOODS
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EVALUATING EXCESS DIETARY EXPOSURE OF YOUNG CHILDREN EATING IN CONTAMINATED ENVIRONMENTS
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TRANSFER EFFICIENCIES OF PESTICIDES FROM HOUSEHOLD FLOORING SURFACES TO FOODS
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EXPOSURE ASSESSMENT IN A LONGITUDINAL COHORT STUDY OF ENVIRONMENTAL EFFECTS ON CHILDREN
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CONTRIBUTION OF CHLIDREN'S ACTIVITIES TO LEAD CONTAMINATION OF FOOD
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DETERMINATION OF A STANDARD FOOD ITEM FOR ANALYSIS OF PESTICIDE CONSUMPTION IN THE DIETARY INTAKE OF YOUNG CHILDREN
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MEASURING EXCESS DIETARY EXPOSURES CAUSED BY EATING ACTIVITIES OF YOUNG CHILDREN
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MEASUREMENTS OF TRANSFERRABLE RESIDUE FROM CERAMIC TILE, VINYL TILE, HARDWOOD FLOORING, AND CARPET USING A PRESS SAMPLER AND C18, PUF, AND COTTON SAMPLING DISKS
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CONCEPTUAL FRAMEWORK FOR CATEGORIZING YOUNG CHILDREN'S EATING BEHAVIORS
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USE OF PHARMACOKINETIC MODELING FOR DIETARY EXPOSURE STUDY DESIGN AND MODEL EVALUATION
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PESTICIDE SURFACE RESIDUE MEASUREMENTS BY A PRESS SAMPLER
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TRANSFER OF PESTICIDES FROM SURFACES TO FOODS FOR THE ESTIMATION OF DIETARY EXPOSURE OF CHILDREN
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MEASURING DIETARY EXPOSURE OF YOUNG CHILDREN
Relationship Reason:MEASURING DIETARY EXPOSURE OF YOUNG CHILDREN60614DOCUMENT1.0A PRODUCT OF THE PROJECTREVIEWEDPUBLICORDNERL
THE THREE INTERACTING FACTORS ASSOCIATED WITH CHILDREN'S DIETARY EXPOSURES: ENVIRONMENTAL CONCENTRATIONS, FOOD CONTAMINATION, AND CHILDREN'S BEHAVIORS
Relationship Reason:THE THREE INTERACTING FACTORS ASSOCIATED WITH CHILDREN'S DIETARY EXPOSURES: ENVIRONMENTAL CONCENTRATIONS, FOOD CONTAMINATION, AND CHILDREN'S BEHAVIORS60605DOCUMENT1.0A PRODUCT OF THE PROJECTREVIEWEDPUBLICORDNERL
DIETARY EXPOSURES OF YOUNG CHILDREN, PART II: FIELD STUDY
Relationship Reason:DIETARY EXPOSURES OF YOUNG CHILDREN, PART II: FIELD STUDY60318DOCUMENT1.0A PRODUCT OF THE PROJECTREVIEWEDPUBLICORDNERL
COLLECTING URINE SAMPLES FROM YOUNG CHILDREN FOR PESTICIDE STUDIES
Relationship Reason:COLLECTING URINE SAMPLES FROM YOUNG CHILDREN FOR PESTICIDE STUDIES60316DOCUMENT1.0A PRODUCT OF THE PROJECTREVIEWEDPUBLICORDNERL
DIETARY EXPOSURES OF YOUNG CHILDREN, PART 1: MODEL DEVELOPMENT AND STUDY DESIGN
Relationship Reason:DIETARY EXPOSURES OF YOUNG CHILDREN, PART 1: MODEL DEVELOPMENT AND STUDY DESIGN60315DOCUMENT1.0A PRODUCT OF THE PROJECTREVIEWEDPUBLICORDNERL
DIETARY EXPOSURES OF YOUNG CHILDREN, PART 3: MODELLING
Relationship Reason:DIETARY EXPOSURES OF YOUNG CHILDREN, PART 3: MODELLING60313DOCUMENT1.0A PRODUCT OF THE PROJECTREVIEWEDPUBLICORDNERL
RELATIONSHIPS OF METALS IN FLOOR DUST AND ON THE HANDS OF TODDLERS
Relationship Reason:RELATIONSHIPS OF METALS IN FLOOR DUST AND ON THE HANDS OF TODDLERS60309DOCUMENT1.0A PRODUCT OF THE PROJECTREVIEWEDPUBLICORDNERL
Project Information:
Progress
:Two major projects are addressed in this task; characterizing children's excess dietary exposure and determining transfers of pesticides from surfaces to foods. A protocol, which improved the procedures for collecting appropriate types of samples to evaluate the children's dietary intake model, was developed in FY99. The protocol more accurately characterizes a child's surface-to-hand-to-food process that is potentially a significant source of indirect ingestion exposures. It was evaluated with a field study in FY00 and FY01 and the activities contributing most to the child's excess intake were initially identified as multiple hand-to-food contacts. This protocol was finalized for use in the NERL Longitudinal Field Measurements Study of Infants and Toddlers Aggregate Exposures (CHEERS) conducted under a separate NERL task. The estimated parameters within the model are transfer and activity factors. In order to measure these in the field, a standard food item was developed and tested in a day-care setting in FY02-03. In FY04-05, the protocol will be tested in a residential setting. Model parameters have also been studied by laboratory experiments. In FY98-99, experiments to determine the amount of pesticides that transferred from a contaminated surface to various food items was initiated. In FY00, a new spray chamber was developed which allowed for more uniform spraying and controlled experiments. Transfer of pesticides from contaminated surfaces is dependent on the class of pesticide, surface type, sampling conditions (temperature and humidity), and food type. This research has continued through FY04.
Two manuscripts are being prepared for the field study results and one for the in-house press sampler (transfer) experiments.
Related Publications: Two publications resulted from a completed, related dietary lead study which summarize the preliminary results for the dietary intake model and are included as background information for this work:
Melnyk, L.J., Berry, M.R., Sheldon, L.S., Freeman, N.C.F., Pellizzari, E.D., and Kinman, R.N. "Dietary Exposure of Children Living in Lead-Laden Environments" Journal of Exposure Analysis and Environmental Epidemiology, 2000, 10: 723-731.
Akland, G., Pellizzari, E.D., Hu, Y., Roberds, J.M., Rohrer, C.A.., Leckie, J.O., and Berry, M.R. "Factors Influencing Total Dietary Exposures of Young Children" Journal of Exposure Analysis and Environmental Epidemiology, 2000, 10: 710-722.
Relevance
:This research directly supports the USEPA's multimedia approach to human exposure and risk assessment and the goals of FQPA, which requires aggregate and cumulative exposure assessments, including specific children's exposures, for pesticides. Methods development consists of protocols and procedures to measure "true" dietary intake by children, collecting food and other samples and supporting information, and investigating ways to identify, predict and/or reduce exposures via the dietary pathway which supports NERL's multimedia human exposure program and the long-term goal (FQ-1). The model research consists of refining the dietary model for predicting exposure to environmental chemicals for young children (Children's Dietary Intake Model) that accounts for both duplicate diet samples as well as food categories and/or food items that become contaminated while being eaten by the child. Research conducted will improve OPPTS and NERL's understanding of the activities relating to how foods become contaminated by other environmental media. This is an important element in assessing dietary exposure of children which, in turn, will allow clients to regulate and conduct accurate risk assessments (FQ-1). Studies will include laboratory investigations designed to measure the contaminant transfer from various surfaces to different types of foods. This research will also identify and explore the important child dietary scenarios that warrant consideration in exposure assessments. Field studies will be used to validate models, investigate priority scenarios, determine potential excess dietary exposure of young children to selected pesticides, and identify associated activities requiring further research. The results will be used for NERL's multimedia / multipathway human exposure studies by providing protocols to measure dietary exposure in the context of total exposure. These activities are communicated to other NERL personnel through conference calls and planning meetings with NERL's Human Exposure and Atmospheric Sciences Division; to the scientific community by publications and presentations at international meetings; and to OPPTS through program discussions with Assistant Laboratory Directors.
Clients
:NERL multimedia field programs, Office of Prevention, Pesticides & Toxic Substances (OPPTS), Office of Pesticide Program, industry
Project IDs:
ID Code
:5438
Project type
:OMIS