Make your own pH probe storage solution

Renfro

Renfro

Well-Known Member
So I got tired of buying the KCl solution for storing pH probes in. They charge too much for that shit. I bought a pound of potassium chloride on amazon for $9.49.

To make a standard 3 Mole KCl solution you take 22.37 grams of potassium chloride and add it to 100 mL of distilled water (I just used my RO since it's at 2 PPM). Make sure that all the KCl is dissolved.

Now you can make your own solution and save money. Not including water cost you can now make a little over 2 liters of storage solution for under $10.
 
DoubleAtotheRON said:
@Renfro Cool... by the way, can you buy the storage solution and 3 stage buffers from Apera direct?
Click to expand...
I know Apera sells them on Amazon.

Apera Instruments AI1114 pH Calibration Solution Kit (7.00, 4.00), 16 oz. for Each, Plus a CalBox for Easy Organization of All Buffer Solutions, HDPE (High Density Polyethylene): Amazon.com: Industrial & Scientific

Apera Instruments AI1114 pH Calibration Solution Kit (7.00, 4.00), 16 oz. for Each, Plus a CalBox for Easy Organization of All Buffer Solutions, HDPE (High Density Polyethylene): Amazon.com: Industrial & Scientific
www.amazon.com
 
I have over 180 no longer needed pharmaceutical Potassium Chloride 20 MEQ tablets, well over 12 0zs. Any reason I couldn't use them in the formula.
 
quirk said:
I have over 180 no longer needed pharmaceutical Potassium Chloride 20 MEQ tablets, well over 12 0zs. Any reason I couldn't use them in the formula.
Click to expand...
Honestly not sure. Most pills have fillers in them and I am not sure about these or if the fillers would be bad in any way. KCL is cheap so I am not sure it's worth the risk if you have a pricey pen.

So to get more chemistry heads to see it I have made another post regarding a problem I am having making the solution. But I will post here as well for continuity.

Chemists Help - Trouble Making 3M KCL Solution

Here is a link to the thread I posted with info I found on making your own 3M KCL pH probe storage solution. https://www.rollitup.org/t/make-your-own-ph-probe-storage-solution.999889/ I did check several sources and the recipe appears to be correct...
www.rollitup.org

I added the precisely measured 22.37 grams of KCLto 100 mL of 2 PPM RO water and I put it on my stirring plate with a lid to prevent evaporation. Set it to stirring at good speed. I checked it the next day after about 10 hours of stirring and it's a saturated solution with some salt that failed to dissolve. Think it's bad KCL or did having 2 PPM of shit in my water really fuck things up that much?
 
Link you back over to this one for needed details..

Chemists Help - Trouble Making 3M KCL Solution

Here is a link to the thread I posted with info I found on making your own 3M KCL pH probe storage solution. https://www.rollitup.org/t/make-your-own-ph-probe-storage-solution.999889/ I did check several sources and the recipe appears to be correct...
www.rollitup.org
 
Renfro said:
Honestly not sure. Most pills have fillers in them and I am not sure about these or if the fillers would be bad in any way. KCL is cheap so I am not sure it's worth the risk if you have a pricey pen.

So to get more chemistry heads to see it I have made another post regarding a problem I am having making the solution. But I will post here as well for continuity.

Chemists Help - Trouble Making 3M KCL Solution

Here is a link to the thread I posted with info I found on making your own 3M KCL pH probe storage solution. https://www.rollitup.org/t/make-your-own-ph-probe-storage-solution.999889/ I did check several sources and the recipe appears to be correct...
www.rollitup.org

I added the precisely measured 22.37 grams of KCLto 100 mL of 2 PPM RO water and I put it on my stirring plate with a lid to prevent evaporation. Set it to stirring at good speed. I checked it the next day after about 10 hours of stirring and it's a saturated solution with some salt that failed to dissolve. Think it's bad KCL or did having 2 PPM of shit in my water really fuck things up that much?
Click to expand...

Thanks for the feedback, fillers didn't cross my mind. I'll give it a shot on my economy pen, not the Apera.
 
You must log in or register to reply here.

Similar threads

calvin.m16
Make gallons of ClearRez/UC Roots/Athena Cleanse for $1.25
Replies
14
Views
1K
Roadblock
R
S
Are my notes correct? Please assist me in changes
2 3
Replies
51
Views
4K
sfw1960
sfw1960
R
Questions about ppm in liquid fertilizer and final nutrient solution measurements
2 3
Replies
53
Views
3K
Delps8
D
medidedicated
Can solution sit stationary? PH drifts/aeration
2 3
Replies
41
Views
3K
xtsho
xtsho
Budzbuddha
The P.I.S.S. Method - ( Pee in your Soil Stupid ) Grow Guide
38 39 40
Replies
783
Views
55K
go go kid
go go kid
Back
Top