Total Diet Study - Structure of Pesticide Analyses Files

CFSAN/Office of Analytics and Outreach

July 1999; Updated June 2003

Note: Only records for analysis type "O" (original) should be used when reviewing or using the analytical results. All other records are quality control data samples.

Field OrderField NameField Description
1MBTotal Diet Study market basket designation represented by a 3-digit number. The first 2 digits indicate the US government's fiscal year the market basket was collected and the 3rd digit is the sequence collected within the fiscal year.
2Food NoNumber designation of a Total Diet Study food, or '---' for records with Anal Type=B.
3Sample DescriptionName of the Total Diet Study food or "reagent blank" for records with Anal Type=B.
4Anal TypeAnalysis type. O=original analysis; D=duplicate analysis; S=spike; B=reagent blank.
5ResidueName of pesticide residue or other analyte.
6ConcConcentration; in original or duplicate analysis records (Anal Type=O or D), concentration of analyte found; in spike records (Anal Type=S), amount of analyte added.
7UnitUnit of concentration found or spiked. M (ppm) or B (ppb).
8TraceBlank, or "T", to indicate that the level found is a trace, i.e., greater than or equal to the limit of detection but less than the limit of quantitation. In most cases where T is in the field, a numeric value also appears in Conc field.
9Recov (%)In spike records (Anal Type=S), percentage recovered; otherwise blank.
10ExtnThree character code representing the extraction-cleanup method used in the analysis.
11DetnTwo character code representing the determinative step used in the analysis.

Page Last Updated: 10/02/2014
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