[Code of Federal Regulations]
[Title 40, Volume 29]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR766.18]

[Page 833]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 766_DIBENZO-PARA-DIOXINS/DIBENZOFURANS--Table of Contents
 
                      Subpart A_General Provisions
 
Sec. 766.18  Method sensitivity.

    The target level of quantitation required under Sec. 766.27 for 
each HDD/HDF congener is the level which must be attempted for each 
resolved HRGC peak for that congener. For at least one product sample, 
at least two analyses of the same isotopically labeled HDD/HDF internal 
calibration standards spiked to a final product concentration equal to 
the LOQ for that congener must be reproducibly extracted, cleaned up, 
and quantified to within 20 percent of each other. 
For each spiked product sample, the signal to noise ratio for the 
calibration standard peaks after complete extraction and cleanup must be 
10:1 or greater. The recovery of the internal calibration standards in 
the extracted and cleaned up product samples must be within 50 to 150 
percent of the amount spiked, and the results must be corrected for 
recovery.

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