LaMotte Alkalinity Liquid Test Kit Question.

[Jasonanatal]

Hello everyone, I recently purchased a LaMotte Alkalinity Liquid Test Kit. However, the instructions included allow you to get your test results in CaCO3 PPM form rather then dKH. I searched on a formula for converting their test results from PPM to dKH but just wanted to be sure that it was correct.
PPM Test Result divided by 17.86 equals dKH Test Result
Does this look correct? Thank you in advance for any assistance you can provide.

 

[ming]

http://www.saltyzoo.com/SaltyCalcs/AlkConv.php

 

[Jasonanatal]

Reply to Ming.

http://www.saltyzoo.com/SaltyCalcs/AlkConv.php

Ming, thank you for the website page. I actually stumbled across that one myself. I just wanted to be sure that their was a definitive formula for this conversion and so far my formula would be correct with the data reflected on this webpage. But I'm searching for a definitive formula for this conversion as oppossed to relying on a chart.

 

[noodleman]

sounds about right, just do the math:
100ppm CaCO3 = 100mg/L CaCO3 = 1mmol/L CaCO3 = 2milliequivalents/L CO3
and 2meq/L CO3 = 5.6dKH

therefore: 1dKH = 17.857ppm CaCO3

 

[Jasonanatal]

Reply to Noodleman.

sounds about right, just do the math:
100ppm CaCO3 = 100mg/L CaCO3 = 1mmol/L CaCO3 = 2milliequivalents/L CO3
and 2meq/L CO3 = 5.6dKH

therefore: 1dKH = 17.857ppm CaCO3

Noodleman, great conversion and thank you for the confirmation. I apprecaite it greatly.