Phosphate standard

[drawman]

@Randy Holmes-Farley are there any phosphate standards for test kits you like or is there an easy way you would recommend making one?

 

[Dan_P]

@Randy Holmes-Farley are there any phosphate standards for test kits you like or is there an easy way you would recommend making one?

Fauna Marin sells Multi Reference, a solution with multiple chemical references in one solution.

 

[Randy Holmes-Farley Verified Community Expert]

You can make one if you want. I can devise a recipe if needed.

 

[drawman]

You can make one if you want. I can devise a recipe if needed.

I have trisodium phosphate if that's helpful. I would love a recipe if it's not too much work.

 

[Randy Holmes-Farley Verified Community Expert]

I have trisodium phosphate if that's helpful. I would love a recipe if it's not too much work.

Does the description say hydrate in it, such as dodecahydrate (a common form)?

 

[drawman]

Does the description say hydrate in it, such as dodecahydrate (a common form)?

It's the stuff from loudwolf:

https://www.loudwolf.com/storefront/index.php?route=product/product&path=775&product_id=1176
That said, it may be a little old so I could probably buy another bottle. Not sure how long it keeps for.

 

[Dan_P]

It's the stuff from loudwolf:

https://www.loudwolf.com/storefront/index.php?route=product/product&path=775&product_id=1176
That said, it may be a little old so I could probably buy another bottle. Not sure how long it keeps for.

Assume it is the dodecahydrate and make up the standard. When you test the phosphate kit you will be way off if it is not the dodecahydrate. Or check the melting point, it is pretty low and no other hydrate is close.

 

[areefer01]

Fauna Marin sells Multi Reference, a solution with multiple chemical references in one solution.

I was also going to suggest this. I keep a bottle on hand in case I see back to back test anomalies with the Tridents.

 

[Randy Holmes-Farley Verified Community Expert]

I’m disappointed in how Loudwolf labels that product. It is not ordinary sodium phosphate from the molecular formula and the CAS number. It is sodium tripolyphosphate, with 3 phosphates linked together. I would not use it as a standard since I am not certain how well our test kits will quantify it.

 

[drawman]

I was also going to suggest this. I keep a bottle on hand in case I see back to back test anomalies with the Tridents.

I may end up going this route.

I’m disappointed in how Loudwolf labels that product. It is not ordinary sodium phosphate from the molecular formula and the CAS number. It is sodium tripolyphosphate, with 3 phosphates linked together. I would not use it as a standard since I am not certain how well our test kits will quantify it.

Good to know maybe I'll just go the fauna marin route or look for another commercially available one.