Visualizations : FDA Survey Data on Perchlorate in Food, 2005-2006 : testing
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Anonymous
says:
testing
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Anonymous
says:
What's perchlorate?
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Watchmen
says:
According to the U.S. FDA, "Perchlorate is a naturally occurring and manmade chemical. Naturally occurring perchlorate, for example, is found in arid states in southwestern United States (U.S), as well as in nitrate fertilizer deposits in Chile and potash ore found in U.S. and Canada. Perchlorate can also form naturally in the atmosphere, leading to trace levels of perchlorate in precipitation. Perchlorate is also an industrial chemical that is used as an oxidising agent in rocket propellant, in fireworks and flares, and for other purposes. It has been detected in a variety of foods and in drinking water from some locations in the U.S."
For more information, please see FDA's "Perchlorate: Question and Answers": http://www.cfsan.fda.gov/~dms/clo4qa.html |
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Watchmen
says:
Food samples are collected from different regions of the United States (domestic samples) as part of FDA's Total Diet Study (TDS). According to the FDA, "The TDS is FDA's ongoing market basket survey in which approximately 280 core foods (TDS foods) in the U.S. food supply are collected and analyzed to determine levels of various contaminants and nutrients in those foods. Four market baskets are generally collected each year, one in each of four geographic regions of the U.S. (i.e., West, North Central, South, and Northeast). For each market basket, samples of each TDS food are collected from grocery stores and fast food restaurants in three cities within the region, prepared table-ready, and composited for analysis. Therefore, each data point for a contaminant or a nutrient represents the analytical result for a composite of three samples of the TDS food. For more information on the TDS, see Total Diet Study."
Additional details about sampling is available on the FDA web site: http://www.cfsan.fda.gov/~dms/clo4dat2.html |