Clams, Oysters, Mussels, Scallops(1), Snails(2), Geoducks(3), Crabs(4)
For PSP analysis each sample must contain a
minimum of 125g-150g and a
minimum of 12 animals.
The PSP test procedure requires a minimum 100 grams of shellfish for an official analysis.
A less than 100g sample may not be used for regulatory purposes.
If Domoic Acid analysis is also required an additional 75-80 grams is needed.
A full 6-ounce cup (10oz if domoic acid analysis
is needed) of drained meat gives sufficient sample to retrieve 100g after processing, and
in most instances, covers for any loss of liquid
through leakage during transportation to
Preparation - Clams, Oysters, Mussels
- Thoroughly clean the outside of the shellfish with fresh water.
- Open the shell by cutting the adductor
muscles. (Caution: DO NOT use heat or
anesthetics before opening shell--product
must be raw for testing.) Rinse the inside
with fresh water to remove sand or other
- Shuck the meat from the shell, being careful
not to cut or damage the body of the
- Without layering collect approximately 150
grams (about 6oz.) meat on a No. 10
- Let drain for 5 minutes. Discard pieces of
shell, and discard drained liquids.
Packaging and Shipping
Place each drained sample into a heavy duty (freezer) Ziploc® type bag.
Double bag the sample using another Ziploc® bag.
- Label each bag with Farm number, permit
number, species, and lot number.
Improperly marked or unmarked samples
may be rejected for analysis.
- Complete the sample submission form
for each sample type
(Marine Toxin Submission Form)
Place submission form in a separate Ziploc® bag.
Freeze sample prior to packaging.
Wrap samples in newspaper or other absorbent material.
- Place samples and submission form in a
sturdy, leak-proof box. A small Coleman
cooler (or equivalent) works well for this
purpose. Packaging samples in envelopes
or other non-sturdy, non-leak-proof
containers is not acceptable (or legal!)
and may result in the samples being rejected by the laboratory.
- Add sufficient frozen gel packs or gel ice
to keep samples cool during transport.
Samples received warm and/or decomposed
may be rejected at EHL discretion.
Decomposed samples interfere with the
integrity of the analysis.
- Ship samples for next day delivery.
Properly packed shellfish samples, double Ziploc® bagged and labeled.
Submission form sealed in Ziploc® bag.
Ship samples via overnight mail to:
State of Alaska
Environmental Health Laboratory
5251 Dr. Martin Luther King Jr. Avenue
Anchorage, AK 99507
ATTN: Eagle Express Courier
Contact the EHL Sample Receiving department
at 907-375-8231 or via email at DEC.EH-Lab-ShippingReceiving@alaska.gov immediately upon
shipment of samples. Please include waybill number.
1, 2, 3, 4 Contact the State of Alaska Seafood
Program Manager at 269-3097 for sampling
requirements for these species.