It is used to test post-wash residues of hypochlorite or hypochlorous acid-based disinfectants / cleaners / detergents.
It measures the amount of residue in ppm.
Disinfectants containing hypochlorous acid can be diluted to determine how many ppm hypochlorous acid they contain.
It can be used to measure the amount of hypochlorous acid produced by machines that produce hypochlorous acid.
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