The phrase "accredited method" is correct and usable in written English.
It can be used when referring to a method that has been officially recognized or approved by a relevant authority or organization.
Example: "The laboratory employs an accredited method for testing the quality of its products to ensure compliance with industry standards."
Alternatives: "certified method" or "approved method".
An accredited method (Norwegian Accreditation (P110)) was employed, with detection limit 0.01 μg Se/g blood.
All samples were analyzed by PCR (DANAK [The Danish Accreditation and Metrology Fund] accredited method) detecting thermophilic Campylobacter spp. (12 ).
The accredited method was based on IAC clean-up with ultra-HPLC and fluorescence detection.
Fatty acids were analysed in all food groups except beverages by an in-house validated and accredited method.
The analysis was conducted using an accredited method at the Department of Clinical Microbiology and Immunology, Lund University Hospital, Lund, Sweden (accredited according to SS-EN ISO/IEC 17025).
Samples were analysed following standard and fully accredited methods (e.g. Great Britain - StAnalystsommittee of Analysts 1978) for pH and fluorine (F) concentration (as potential indicators of acidic volcanic inputs and because volcanic fluorine has been associated with poisoning of livestock; Cronin et al. 1998).
Samples were analyzed by the Karolinska University Hospital Clinical Chemistry Department with GCP accredited methods (Swedac, Stockholm, Sweden).
Laboratory tests were performed centrally at the Institute for Clinical Chemistry of the Klinikum Schwabing using accredited methods.
The analysis of the PBDEs in the perfusion medium, plasma and placental tissue followed accredited methods for analysis of PBDEs in biota as previously described [ 13, 26, 27].
The same concentrations of protein and lipid were obtained for all diets, analysed by accredited methods at NIFES (Additional file 2).
Dietary PCB concentrations were verified by Gas Chromatography/Mass Spectrometry (GC/MS) in SIM mode, performed at NIFES by accredited methods based on previous publications [ 46, 47].
