RXSOL
Lab Chemical
TOTAL HARDNESS INDICATOR TABLETS
SKU: RXSOL-60-6605-749
- Fill a water sample of approx. ...
- Fill a 10 ml water sample into another cuvette.
- Add 1 Hard check tablet, crush it and after having closed the cuvette mix until everything is dissolved.
- Wait 5 minutes until the reaction time is over.
- Switch the Spectro 3 Photometer on with any of the keys.
Application
tablets are dissolved in 100 ml of the water sample to be tested, which has been buffered at pH 10 with 1 ml of Ammonia/ Ammonium chloride buffer solution, and then titrated with EDTA solution (0,01 M) till the sample turns from red to blue. Total hardness in mg/l = 10×ml of titrant used
