Macherey-Nagel, 91306, Quantofix Sulfite, Box of 100 Strips

Description

This test strip is for the rapid and reliable determination of Sulfite in solutions. The easy dip-and-read-procedure provides a reliable result within 20 seconds.

In process and boiler water, sulfite is used as an oxygen scavenger. To avoid over treatment, the concentration needs to be controlled, regularly. These tests are also used to control the Sulfite concentration in foodstuff treated with sulfur compounds (SO2, HSO3–, SO32–) for longer shelf-life. In the process of wine making the control of sulfite is important to control production and quality of the wine.

– Type Semi-quantitative test strips.

– Presentation Tube of 100 test strips.

– Color reaction white → salmon.

– Gradation 0 · 10 · 25 · 50 · 100 · 250 · 500 · 1000 mg/l SO32–.

Test sticks for the semi-quantitative determination of sulphite in solutionsGradation of scale: 0-10-25-50-100-250-500-1000 mg/l SO 3 2û white to salmonStrongly or weakly acidic solutions have to be buffered with solid sodium acetate prior to testing, since the test paper does not react with sulphites in acidic media. Sulphide ions interfere since they also produce a red reaction colour of the test paper in neutral solution. This interference can be eliminated by the addition of an excess of nickel(II) ions. The NiS formed can be removed by filtration. Larger amounts of reducing agents, such as hydroxylammonium chloride or ascorbic acid, interfere, causing low sulphite results.