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# Wild-Caught Shrimp (RM 8258)

## Appears In

                        - Four NIST Reference Materials Help Authenticate Shrimp and Salmon

NIST reference material 8258, Wild-caught shrimp, is made of a mixture of wild-caught brown shrimp (Farfantepenaeus aztecus) and Atlantic white shrimp (Litopenaeus setiferus) that were trawl-caught by a commercial shrimper off the coast of South Carolina, USA. Headed shrimp were delivered to NIST Charleston on wet ice and stored at −40 °C until processing. Shrimp were thawed, rinsed with fresh water, peeled and chopped, then refrozen at −40 °C. The frozen tissue pieces were stored in LN2 vapor phase freezers (at or below −150 °C) until cryomilling [2]. The fresh-frozen homogenates were bottled in 6 g to 8 g aliquots and stored at or below −80 °C until analysis.

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