Refractometers And Salinity Measurement

[EnterName]

Both temperature and wavelength of
Light matter, but I could certainly have made a mistake.

Many times, refractive index is standardized at 20 deg C and the wavelength of the d emission line of sodium (589.3 nm). That is what I used.

The google AI calculates that the refractive index of 3.24% KCl under these conditions is 1.3374. Close, but not exactly what I got and that appears to be the difference. I do not have old CRC handbook handy, but it may have used a data source that has been replaced by better data (or I made a mistake).

Again using the google AI to run a calculation, it determines that the salinity of seawater matching that refractive index has a salinity of 24 ppt, matching your value. :)

Thus, I’m not sure exactly why I got the 26 ppt value, but it appears to be incorrect.

Thank you for the response, this helps!

If it's not too much trouble, I would really appreciate it, if you could take a quick look at the tools I have built. I want to make them freely available to everyone (no ads, no tracking, etc.).
@Fish Fan has already seen a preview and can vouch that it's worth a look They should fix the issue with online calculators not offering the right reagent/hydrate form for your Ammonia/Phosphate/2-Part/etc. recipes.
Don't worry, you don't need to check the math , I would just like to hear your suggestions (usability or things to add)

So far I have:

• Salinity: hydrometer/refractometer SG ↔ ppt (PSU or g/kg) with temperature correction (incl. glass expansion), plus PDF/CSV correction tables
• Salinity balancing: how much salt to add, or how much water to swap for RO/DI
• Custom dosing recipes:
  • Ammonia: NH₄HCO₃, NH₄Cl, NH₄NO₃
  • Nitrate: NaNO₃, KNO₃, Ca(NO₃)₂, NH₄NO₃
  • Phosphate: NaH₂PO₄, Na₂HPO₄, KH₂PO₄, K₂HPO₄
  • Balling: CaCl₂ and any mix of Na₂CO₃/NaHCO₃
  • All salts selectable in their hydrate forms, with a solubility check on the stock solution
• AFR dosing
• Unit conversions: volume (gal ↔ L) and nutrients for paper readers (e.g. µmol/L ↔ ppm as NH₃-N/TAN, NH₃, NH₄)

Every result shows its math with numbers and sources:

It also shows the side effects of a dose, e.g. for ammonia or AFR:

It isn't public yet, so I would like to send you the link privately. I can't send you a DM here on R2R, maybe you can start a conversation with me?

 

[Randy Holmes-Farley Verified Community Expert]

Sure. :)

 

[Fish Fan]

Thank you for the response, this helps!

If it's not too much trouble, I would really appreciate it, if you could take a quick look at the tools I have built. I want to make them freely available to everyone (no ads, no tracking, etc.).
@Fish Fan has already seen a preview and can vouch that it's worth a look They should fix the issue with online calculators not offering the right reagent/hydrate form for your Ammonia/Phosphate/2-Part/etc. recipes.
Don't worry, you don't need to check the math , I would just like to hear your suggestions (usability or things to add)

So far I have:

• Salinity: hydrometer/refractometer SG ↔ ppt (PSU or g/kg) with temperature correction (incl. glass expansion), plus PDF/CSV correction tables
• Salinity balancing: how much salt to add, or how much water to swap for RO/DI
• Custom dosing recipes:
  • Ammonia: NH₄HCO₃, NH₄Cl, NH₄NO₃
  • Nitrate: NaNO₃, KNO₃, Ca(NO₃)₂, NH₄NO₃
  • Phosphate: NaH₂PO₄, Na₂HPO₄, KH₂PO₄, K₂HPO₄
  • Balling: CaCl₂ and any mix of Na₂CO₃/NaHCO₃
  • All salts selectable in their hydrate forms, with a solubility check on the stock solution
• AFR dosing
• Unit conversions: volume (gal ↔ L) and nutrients for paper readers (e.g. µmol/L ↔ ppm as NH₃-N/TAN, NH₃, NH₄)

Every result shows its math with numbers and sources:

It also shows the side effects of a dose, e.g. for ammonia or AFR:

It isn't public yet, so I would like to send you the link privately. I can't send you a DM here on R2R, maybe you can start a conversation with me?

Sure. :)

Indeed, @EnterName did an excellent job with this, and I think it could really help people

Thanks for checking it out, Randy!

 

[EnterName]

Indeed, @EnterName did an excellent job with this, and I think it could really help people

Thanks for checking it out, Randy!

Don't hype him up too much, it's still work in progress
Your link works again btw. (Randy has the same), so you can check out the All for Reef page you requested.

 

[Fish Fan]

Don't hype him up too much, it's still work in progress
Your link works again btw. (Randy has the same), so you can check out the All for Reef page you requested.

Will do; thanks!