Mayonaise
Burning up in speed
- Dec 8, 2023
- 339
I noticed some aquarium test strips use the PPM measurement unit and this had me quite confused, so I'm sharing what I've learned.
PPM (parts per million) is a unit used to describe very small concentrations of a substance in a larger solution. 1 PPM means 1 part per every 1,000,000 (or 1/1,000,000).
Example: 1g / 1L = 1,000mg / 1,000ml
If we divide it by 1,000 we have 1,000mg/1,000,000ml or, better: 1mg / 1,000ml
1mg / 1L equals 1 PPM. So, for instance, a value of 10 (ppm) in the strip above would equal 10mg / 1L
See the following threads to learn how to prepare mixtures with a desired SN amount (many thanks to the original posters):
https://sanctioned-suicide.net/threads/testing-my-sn-using-the-aquarium-testing-strips.31522/ (very straightforward)
https://sanctioned-suicide.net/threads/sn-aquarium-purity-testing.34630/ (more math involved but worth a read)
Sources for PPM explanation:
Study.com
PDF (see "Concentrations in water")
PPM (parts per million) is a unit used to describe very small concentrations of a substance in a larger solution. 1 PPM means 1 part per every 1,000,000 (or 1/1,000,000).
Example: 1g / 1L = 1,000mg / 1,000ml
If we divide it by 1,000 we have 1,000mg/1,000,000ml or, better: 1mg / 1,000ml
1mg / 1L equals 1 PPM. So, for instance, a value of 10 (ppm) in the strip above would equal 10mg / 1L
See the following threads to learn how to prepare mixtures with a desired SN amount (many thanks to the original posters):
https://sanctioned-suicide.net/threads/testing-my-sn-using-the-aquarium-testing-strips.31522/ (very straightforward)
https://sanctioned-suicide.net/threads/sn-aquarium-purity-testing.34630/ (more math involved but worth a read)
Sources for PPM explanation:
Study.com
PDF (see "Concentrations in water")
