Updates: seaweed and soy sauce (9/27/2012)

9/27/2012 5:20pm: Three more dried seaweed samples were tested recently that came from the same source as our measurements in 2011. As with the previous samples, no radioactive isotopes were detected from the reactors at Fukushima. These results have been posted on the seaweed section of our Food Chain page.

We have also tested a sample of soy sauce purchased in a local grocery store. The soy sauce was labeled as a product of Japan. No radioactive isotopes were detected that can be traced to the reactors at Fukushima. Our limits for Cesium-134 and Cesium-137 were 0.029 and 0.032 Bq/L, respectively. For comparison, the activity concentration of Potassium-40 (K-40) in the sample was approximately 100 Bq/L. These results have been posted on our Food Chain page.

Mark [BRAWM Team Member]