| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| MadTinker | "@Ag8n - yeah, pretty sure you're right about filtering. I also think there are some calibration issues that remain even with a perfect sample. Sti..." | Read more » | over 6 years ago | |||
| Ag8n | "Madtinker- I've seen "universal" pH indicators before. Interesting, using them with the spectrometer. You would probably need to filter the water..." | Read more » | over 6 years ago | |||
| MadTinker | "spectrophotometric technique: Ground and river water quality monitoring using a smartphone-based pH sensor " | Read more » | over 6 years ago | |||
| liz | "one more: https://publiclab.org/questions/liz/09-22-2017/what-are-examples-of-citizen-science-projects-that-have-tested-water-for-ph " | Read more » | about 7 years ago | |||
| liz | "Also this one: https://publiclab.org/notes/liz/09-22-2017/when-is-litmus-paper-not-good-enough-for-measuring-ph " | Read more » | about 7 years ago | |||
| liz | "Very cool! I just asked this question: https://publiclab.org/questions/liz/09-22-2017/how-has-ph-testing-evolved-over-time " | Read more » | about 7 years ago |