From Instruments Direct, a pack of individual Sulphite test strips designed for measuring the levels of sulphite present in water-based solutions. The sulphite test strips are made from a plastic section with a sealed test paper in the tip. These testing strips are easy to use and provide accurate results within 15 seconds.
• Take a single testing strip and immerse the tip into the solution or sample to be tested
• Swirl the strip in the solution three times
• Remove the strip from the solution and carefully shake off any excess liquid.
• Expose the indicator tip to the air and wait for 15 seconds
• Compare the test strip with the indicator colour chart on the on the label
• The concentration range of 10, 501 100, 250 and 500 ppm