Detection level of celery allergen

With current Laboratory PCR test it is only possible to detect Celery as <5mg/kg, is there an acceptable level of allergen ? 

With current Laboratory PCR test it is only possible to detect Celery as <5mg/kg, is there an acceptable level of allergen ? 

SO₂ is the only allergen for which a formal threshold is currently defined in the UK.

Analysis is perhaps best viewed as a validation/verification component of a broader comprehensive strategy to manage cross-contamination, i.e. along with risk assessment, handling procedures, cleaning procedures etc. Getting a "negative" result on the testing (i.e. no detection above the LOD) would then generally be considered as signifying that your controls are working correctly.

With current Laboratory PCR test it is only possible to detect Celery as <5mg/kg, is there an acceptable level of allergen ? 

Lower LOD is apparently available, eg

 celery LOD.PNG   21.44KB   0 downloads

https://food.r-bioph...llergen-celery/

For UK -

 FSA - 14 allergens.jpg   525.1KB   0 downloads