ringtest for quality assurance in marine shellfish toxins

Shellfish Toxins

Amnesic, lipophillic and paralytic shellfish toxins

Proficiency tests

Participation is open to all laboratories.

Determinand Group Sample Type* Exercise Id.
ASP shellfish toxins Blue Mussel tissue and BT7
Lipophilic shellfish toxins oyster tissue and BT11
PSP shellfish toxins Scallop tissue and Clam BT12
Tetrodotoxin tissue and Cockle tissue DE16

Click on the Exercise Id. for more specific information about the particular exercise(s).

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General information

  • Shellfish test materials are collected from contaminated coastal sites like e.g. the North Sea, Mediterranean Sea and from Pacific Ocean.
  • Depending on the type of exercise, shellfish samples are prepared from e.g. mussel, oyster, scallop, clam, or cockle tissue.
  • Shellfish toxin samples are either natural contaminated or mixed with contaminated shellfish tissue where relevant.
  • Shellfish tissue samples contain ± 5 gram of homogenized tissue. Occasionally, extracts of shellfish tissue are distributed when relevant.
  • Shellfish tissue samples are autoclaved and are stable over a number of years when stored in the freezer.
  • Shellfish tissue samples are dispatched under cooled conditions.
  • Reports contain all data reported under strict confidentiality, including Z-score plots and method information of the methods used.

How to participate

Complete the application form and return it by email.


Fees depend on your choice of programme and your preferred number of rounds per year.

Web shop

When available, leftover samples, to be used as reference materials, can be ordered in the WEPAL/QUASIMEME webshop.