Recovery Ranges for Residue Analyses
FSIS published final regulations in 1987 and in 1993 codifying the criteria under which non-Federal laboratories would be accredited to perform analyses of official meat and poultry samples. Among the criteria are recovery ranges for analyses of chemical residues included in the accreditation program. The original recovery ranges were based on quality control criteria for the analytical methods used by FSIS at that time. Since then, FSIS laboratories, and some accredited laboratories, have begun using newer more sensitive methods for some of these analyses, e.g., for chlorinated hydrocarbons (CHCs), with updated quality control criteria.
FSIS has proposed revisions to the current ALP regulations (Code of Federal Regulations 9 CFR 439) that will, among other things, address the use of current methods.
As an adjunct to the proposed regulations, FSIS is providing here information on FSIS recovery ranges for methods currently used by the agency and that may be employed by accredited laboratories. The ranges provided below cover all FSIS methods. Some methods may have narrower recovery ranges. For detailed information about the methods, interested persons should contact the Accredited Laboratory Program staff by telephone at (706) 546-2337, or by mail addressed to: Accredited Laboratory Program, 950 College Station Road; Athens, GA 30605.
Chlorinated Hydrocarbons (CHCs) and Polychlorinated Biphenyls (PCBs)
The recovery range for most CHC residues lies within the range of 70-120%. Some exceptions include toxaphene (60-110%), and chlorpyrifos, captan, stirofos, and kepone (all at 50-110%).
The recovery range for PCB residues lies within the range of 75-100%.
The recovery range for arsenic residues lies within the range of 70-110%.
The recovery range for sulfonamide residues lies within the range of 80-120%.
The recovery range for nitrosamine residues lies within the range of 70 - 110%, except that the range for DBNA is 45-110%.