3B Analytical referred questions about the discrepancy in test results to Brooks Foster, a Portland attorney. In a written statement, Foster said 3B Analytical stands by its analysis. He offered multiple explanations of why the labs hired by The Oregonian/OregonLive came up with different results. He said 3B Analytical may have tested a different — and untainted — part of the batch, or that the pesticide contamination may not have been spread evenly throughout the product. He also speculated that our analysis may have been wrong.
The hypothesis was not correct. While two of the solutions caused the eggs to increase in mass, syrup caused the egg to lose mass. This shows that the syrup was hypertonic to the solution inside of the egg, causing water to diffuse out of the egg to try and establish equilibrium. The egg’s mass increased in the distilled water and vinegar because they were hypotonic to the solution in the egg, causing water to diffuse into the cell. The shell on the egg dissolved because the egg shell is made of calcium carbonate and vinegar contains acetic acid. These two can react to produce calcium acetate and carbonic acid which then decompose into water and carbon dioxide.