Critical Comparison between Modified Monier-Williams and Electrochemical Methods to Determine Sulfite in Aqueous Solutions

Table 1

Free SO₂ concentration determined by the Monier-Williams modified method using 1 L min⁻¹ air flow.

Sample no.	Free SO2 (ppm)	Free SO2 applying correction factor* (ppm)
1	42,43	62,79
2	43,59	64,52
3	45,91	67,94
4	43,18	63,91
5	42,84	63,41
6	45,10	66,75
7	45,91	60,56
8	42,92	63,52
9	42,34	62,67
10	43,11	63,81
11	43,46	64,32

* Correction factor: 1,48.