The results of the 2020 eDNA GCN proficiency tests are presented in the table above. This latest round comprised ten different unknown samples to analyse, labs provided their own eDNA kits so that any level of sample degradation/recovery could also be monitored. This year, 5 of 8 labs correctly identified all samples (compared to 2 of 8 labs in 2019 and 5 of 9 labs spring 2018). One laboratory reported false-positive detection in a negative sample and 3 laboratories missed samples containing low GCN DNA. FAPAS, who oversees the proficiency testing scheme, score results as ‘satisfactory’ if both the PCR result is correct and whether inhibition or not is recorded as expected.
The table shows the full results of the test. Highlighted is the ADAS eDNA lab service (Lab 1 in this test iteration), who again identified all samples correctly. Labs reporting GCN analysis results as ‘not satisfactory’ are highlighted in red. We do not know the identity of the other laboratories taking part.
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