Product information "HI3820* CTK Acidity"
With the use of diluted sodium hydroxide as the titrant and bromphenol blue or phenolphthalein indicators, the contribution of strong or organic acids can be determined. The measurement of the strong acid contribution to the sample acidity is known as methyl orange acidity. This is carried out by titrating with sodium hydroxide until the solution turns from yellow to green/blue (pH endpoint about 4.5). The total acidity caused by both mineral and organic acids is determined by titrating to an endpoint pH of 8.3, using phenolphthalein as an indicator. This is known as phenolphthalein inacidity.
HI 3820 test kit comes with 10 mL dechlorinating reagent, bromophenol blue indicator, phenolpthalein indicator, acidity titrant, 10 mL calibrated vessel, 50 mL calibrated vessel, and calibrated syringe.
Range 0-100 mg/L
Smallest Increment 1 mg/L
Chemical Method Methyl-orange/Phenolphthalein
Number of Tests approx. 110
Weight 910 g