Determination of Chlorinity of Water without the Use of Chromate Indicator

Table 4

Comparison of the Results of Determination of Chlorinity (g/kg) from the Mohr-Knudsen Method and the Present Methods with Phosphate/Phenolphthalein as Indicator.

Trial	Mohr-Knudsen Method	Phosphate/Ph’pht Method (Present)	Difference
1	17.06	17.42	0.38
2	17.00	17.32	0.32
3	16.85	17.87	1.02
4	17.36	17.61	0.05
5	17.35	17.70	0.35
Ave.  ± Std.Dev.	17.12 ± 0.22	17.58 ± 0.22