[Code of Federal Regulations]
[Title 40, Volume 28]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR766.18]

[Page 807-808]
 
                   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

[[Page 808]]

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.