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- Complaint casebooks contain foreign matter
Last updated on March 7, 2025.
The text is from here.
Complaint casebooks contain foreign matter
1.Overview
When I ate the clams after cooking, there was a round and hard foreign matter.
Foreign matter (enlarged) in the crawling
2.Results of the survey
- Spherical mass with a diameter of 3mm and a weight of 46mg
- Solubility: Insoluble in water. It melted by foaming in hydrochloric acid.
- Combustion: Non-combustion
- Condition: White and smooth surface
- Atom absorption: Calcium 66%
- Infrared spectroscopy: A spectrum similar to calcium carbonate was observed.
3.Conclusion
Analysis of the chemical composition of this substance revealed that it was calcium carbonate. This was a pearl formed on the outer membrane of the shell.
4.Reference
Such pearls are often found in bivalve such as clams, clams and Korean clams.
5.Citation
Food complaints Q&A: Tokyo
Published on March 8, 2007
Inquiries to this page
RIKEN, Medical Care Bureau Institute of Hygiene
Phone: 045-370-9451
Phone: 045-370-9451
Fax: 045-370-8462
E-Mail address ir-eiken@city.yokohama.lg.jp
Page ID: 911-524-188
