Total Diet Study - Structure of Elemental Analyses Files

CFSAN/Office of Analytics and Outreach

July 1999; Updated June 2003; September 2004 and January 2011.

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

Field Order Field Name Field Description
1 MB Total Diet Study market basket designation represented by a 6-digit number. The first 4 digits indicate the fiscal year and the last 2 digits indicate the specific market basket (01 through 04) in which the sample was collected.
2 Food No Number designation of a Total Diet Study food. Field is blank for samples that are not Total Diet Study foods.
3 Food Name Name of the Total Diet Study food. Field is blank for samples that are not Total Diet Study foods.
4 Anal Type Analysis type.
  • O = original analysis
  • Q = quality control analysis
5 Sample Qualifier Codes used to provide additional definition of the type of sample.
  • RAP = Replicate analytical portion
  • UAP = Unfortified analytical portion
  • FAP = Fortified analytical portion
  • FAS = Fortified analytical solution
  • MBK = Method blank
  • FMB = Fortified method blank
  • RM = Reference material
  • OTH = Undefined sample qualifier not listed.
6 Replicate # Indicates replicate number if more than one analysis performed.
7 Element Full name of the element determined.
8 Conc Concentration of the element found in the original sample analysis (Anal Type = O).
9 Unit Unit of the value reported in Conc, LOD, and LOQ fields.
10 Trace Contains 'TR' if the value in Conc field is greater than or equal to the limit of detection and less than the limit of quantification.
11 LOD Limit of detection.
12 LOQ Limit of quantification.
13 Reference Material Code for reference material when Sample Qualifier = RM.
14 QC Level Concentration of the element found in the quality control analysis (Anal Type = Q).
15 QC unit Unit of the value reported in QC Level field.
16 QC% Recvd Percent recovery of element associated with quality control analysis (Anal Type = Q) if applicable.
17 Result Qualifier and Remarks Result qualifier and any associated remark.
  • BQL = Result is below LOQ (but above LOD)
  • Duplicate = sample was reanalyzed
  • NC = RM not certified for that element
  • NFE = Not fortified with this element
  • REJ = Result was rejected
  • OTH = Other
18 Method Reference to document describing analytical method.
19 Instrument Abbreviation of analytical instrument used to determine element.
  • GFAAS = Graphite furnace atomic absorption spectrometry
  • HGAAS = Hydride generation atomic absorption spectrometry
  • CVAAS = Cold vapor atomic absorption spectrometry
  • ICPAES = Inductively coupled plasma atomic emission spectrometry
20 Batch ID Analytical batch identification

This document was originally issued July 1999; and Updated June 2003, July 2004, October 2009, and January 2011.

Page Last Updated: 10/02/2014
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