potassium - Page 10

Habib · #**226** 12/08/2006, 11:53 AM

Quote:

Originally posted by tetra
in case you want to do it yourself; might be cheaper...hahahaha

Eosin Y TS (adsorption indicator)—Dissolve 50 mg of eosin Y in 10 mL of water.

Assay— Dissolve about 200 mg of Potassium Chloride, accurately weighed, in 10 mL of water. Add 10 mL of glacial acetic acid, 75 mL of methanol, and 3 drops of eosin Y TS. Titrate, with shaking, with 0.1 N silver nitrate VS to a pink endpoint. Each mL of 0.1 N silver nitrate is equivalent to 7.455 mg of KCl.

That would measure K+ or Cl-?

Orochimaru · #**227** 12/08/2006, 12:13 PM

I believe it's Cl since you are forming AgCl.

spamin76 · #**228** 12/08/2006, 12:16 PM

Ok - I have a pretty good idea of what potasium does in vertebrates and higher vertebrates, but what is potassium going to do for corals - biochemically or physiologically if anything at all? Do corals need potassium, and if so how do they use it?

I am guessing that potassium is not going to make a huge difference in the overall make up of the water chemistry since it is not all that different from things like sodium... just floating around as ions what does potassiun really do that would make a tank that much better?

Habib · #**229** 12/08/2006, 12:20 PM

Quote:

Originally posted by tetra
I believe it's Cl since you are forming AgCl.

So it would not measure potassium in seawater.

Only in a solution of potassium chloride without any potassium or chloride besides coming from the KCl.

Bebo77 · #**230** 12/08/2006, 12:40 PM

Quote:

Originally posted by spamin76
Ok - I have a pretty good idea of what potasium does in vertebrates and higher vertebrates, but what is potassium going to do for corals - biochemically or physiologically if anything at all? Do corals need potassium, and if so how do they use it?

I am guessing that potassium is not going to make a huge difference in the overall make up of the water chemistry since it is not all that different from things like sodium... just floating around as ions what does potassiun really do that would make a tank that much better?

it actually colored up alot of my purples and blues.. the color is a lot deeper...

Randy Holmes-Farley · #**231** 12/08/2006, 01:08 PM

Ok - I have a pretty good idea of what potasium does in vertebrates and higher vertebrates, but what is potassium going to do for corals - biochemically or physiologically if anything at all? Do corals need potassium, and if so how do they use it?

All organisms, or at least nearly all, need potassium to live. It is a very important ion inside of most cells. The question is whether aquaria get depleted from normal seawater values, and if they do, is there any consequence for tank organisms. IMO, the evidence of benefit to aquaria is sketchy at present.

Bebo77 · #**232** 12/08/2006, 01:34 PM

Quote:

Originally posted by Dr. Mac
Anyone use NSW and used this test? I have tested bottled NSW and also water that has come in shipments direct from the Solomon Islands and I know that is NSW too and the results of both are about 250 with the Zeo K test. Despite the test being difficult to read the results on NSW I have checked with this kit are not at 400.

Randy any idea why this happens? I know nsw levels are supposed to test potassium at levels of 400.. but it seems that no one has that high of a level without dosing....Maybe out saltwater mixes dont have enough K+ to begin with...

Randy Holmes-Farley · #**233** 12/08/2006, 01:42 PM

I found this table for the current Thermo Orion Potassium selective electrode. It looks good to go in seawater:

http://www.thermo.com/eThermo/CMA/PD...File_18716.pdf

from it:

Levels of Possible Interferences (in ppm) Causing a 10% Error
Interferences to Potassium Chloride

Cs+ 100
NH4+ 270
Tl+ 3140
H+ 1.6= pH
Ag+ 276,500
*Tris+ 310,500
Li+ 35,600
Na+ 117,900
* Tris is the cation of tris(hydroxymethyl) aminomethane.

Randy Holmes-Farley · #**234** 12/08/2006, 01:45 PM

Originally posted by Dr. Mac
Anyone use NSW and used this test? I have tested bottled NSW and also water that has come in shipments direct from the Solomon Islands and I know that is NSW too and the results of both are about 250 with the Zeo K test. Despite the test being difficult to read the results on NSW I have checked with this kit are not at 400.
--------------------------------------------------------------------------------

Randy any idea why this happens? I know nsw levels are supposed to test potassium at levels of 400.. but it seems that no one has that high of a level without dosing....Maybe out saltwater mixes dont have enough K+ to begin with...

I think it more likely the kit is inaccurate than that the oceans have recently become depleted in potassium.

Seriously, seawater, even in shore water, should not be that depleted in potassium even if the salinity is a bit low from runoff.

F35-Joint Strike Fighter · #**235** 12/08/2006, 11:02 PM

I don't think the test kit is accurate either IMO.

Bump for good thread!

Rugrat2006 · #**236** 12/09/2006, 12:44 AM

I plan to buy kalium test kit, now I need to cancel it since it's not accurate for me to use it. Please let me know which test kit should I go for it?

Bebo77 · #**237** 12/09/2006, 12:04 PM

it is the only test out....

F35-Joint Strike Fighter · #**238** 12/09/2006, 12:11 PM

Quote:

Originally posted by Rugrat2006
I plan to buy kalium test kit, now I need to cancel it since it's not accurate for me to use it. Please let me know which test kit should I go for it?

you can wait for Salifer, hopefully they will have one before the X-mas .

Bebo77 · #**239** 12/09/2006, 12:20 PM

lol.. i dont think there will be another one any time soon...

Rugrat2006 · #**240** 12/09/2006, 01:08 PM

Quote:

Originally posted by F18-Hornet
you can wait for Salifer, hopefully they will have one before the X-mas .

Did you call them?

F35-Joint Strike Fighter · #**241** 12/10/2006, 12:05 PM

Randy,

Can I use this liquid potassium? Thanks!

Randy Holmes-Farley · #**242** 12/10/2006, 02:12 PM

I probably wouldn't.

What other ingredients are a little further down that second picture?

The citrate and aspartate might be beneficial in small amounts, but are present in higher concentrations than the potassium, and will boost those organics a lot if you make a substantial potassium correction.

F35-Joint Strike Fighter · #**243** 12/11/2006, 10:26 AM

Thanks! I'll trash those bottles then.

Bebo77 · #**244** 12/11/2006, 10:28 AM

or drink them....

DrBDC · #**245** 12/11/2006, 11:18 AM

Might as well use them for yourself. Do you need it or will it make you feel better and more energetic who knows. But I know the trash can won't benefit.

Bebo77 · #**246** 12/11/2006, 11:41 AM

maybe you will become more colorfull too... lol

DrBDC · #**247** 12/11/2006, 01:01 PM

F35-Joint Strike Fighter · #**248** 12/11/2006, 03:45 PM

Quote:

Originally posted by Bebo77
maybe you will become more colorfull too... lol

I don't see why not?

DrBDC · #**249** 12/11/2006, 07:16 PM

Your bones may be more colorful!

naka · #**250** 01/04/2007, 07:07 PM

So what's the verdict? Notice any difference in corals by dosing K? I'm thinking of buying Potassium Chloride Powder

Thanks,

James