Tiny bubbles and surface impurities can mess up EZ experiments, as shown by how removing bubbles reduces certain light absorption patterns and how hard it is to get rid of these bubbles completely.
Scientific Claim
Nanobubbles and surface contaminants can significantly confound EZ experiments, as evidenced by the reduction of the 270 nm absorption peak with degassing and the known challenges of removing nanobubbles from water.
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
definitive
Can make definitive causal claims
Assessment Explanation
The study reports specific observations about how degassing reduces the 270 nm peak and the challenges of removing nanobubbles, which are factual statements about experimental confounds.
Source Excerpt
“Plastic nanospheres can be easily contaminated with charge bearing groups. In the case of polytetrafluoroethylene (PTFE) these may include 'residual carboxylic groups from the polymerization process'. [...] There is also growing research showing that the removal of nanobubbles from water can be very challenging. This is especially true when they are adsorbed on surfaces. As noted before, the introduction of degassing methods reduced the appearance of the peak at 270 nm which Pollack attributes to EZ water.”
Evidence from Studies
Supporting Evidence (1)
The study describes how nanobubbles and surface contaminants can confound EZ experiments, citing specific examples like the reduction of the 270 nm peak with degassing and the challenges of removing nanobubbles.