Over the Garden Gate: Test your soil in the fall

Fall testing is ideal because it gives you plenty of time to get results back from the lab and to begin improving your soil ...
Hackaday

Homebrew PH Meter Uses Antimony Electrode

Understanding the nature of pH has bedeviled beginning (and not-so-beginning) chemistry students for nearly as long as chemistry has had students. It all seems so arbitrary, being the base-10 log of ...
Rochester Institute of Technology

Cold Extraction pH Test

IPI tests paper-based materials and adhesives for pH levels using a modification (described in ISO 18902) of the standardized test, TAPPI T 509 Hydrogen Ion Concentration (pH) of Paper Extracts (Cold ...
Ars Technica

USB pH Probe

I'm looking to monitor the pH of a solution over time for some hobbyist chemistry. I don't need extreme accuracy by any means... being within .3 should be good enough.<BR><BR>Are there any reasonably ...