How often should a firm test for sulfites in frozen shrimp they receive, if they have a certificate that states the shrimp is sulfite-free?
It is reasonable to assume that this processor is not the primary processor because the product is frozen. The sulfite hazard should be controlled by the primary processor, and therefore need not be addressed by the secondary processor. Additionally, the processor should collect at least one representative sample for each new supplier, and analyze for sulfiting agents.
