The sulfite test strip is used to detect sulfite ions in water-based solutions, measuring in increments of 10, 50, 100, 250, and 500ppm.
The sulfite test strip will detect free sulfite. Detection of combined or total (free + combined) sulfite requires additional sample prep.
Various types of sulfites can be tested with this strip: sulfite, bisulfite, and metabisulfite. The original color chart was developed to measure sulfite ions in ppm (from sodium sulfite standards), however, bisulfite and metabisulfite also match the same color chart.
Canadian Owned