Lieu où se trouve:Leeds,
Lieu de livraison: Worldwide,
Numéro de l'objet:263691826639Universal indicator papers have been impregnated with a mixture of several indicators. On contact with the sample solution they assume a particular colour. A check against the supplied colour comparison table allows the pH to be determined.200 test paper strips packed in a tidy plastic case. To see how does it work and how does the colour change, dip a small section of the pH paper in a sample of tap water, then add a drop or two of vinegar; the colour will change from green to red (acidic), or add a drop of bleach; the colour will change to dark blue (basic). Reduce risk by using as a pre-test validation toolSimplified testing with results in less than one minuteTest strips eliminate chemical handling and clean-upVial label contains the colour key for easy readings in lab or fieldTest full range pH (1 - 14)200 test strips included (10 books x 20 strips)Graduation: 1 pH unitCase dimensions: ~73x53x15 mmWeight: ~35 gCost effectiveInstructions:Hold pH paper strip from edge and dip its other end in test sample for a second; you may also drop a few drops of sample on the pH paper using an eyedropper. Compare the colour obtained of the wet paper strip with the colours shown in the chart provided to find out the pH value.Store unused pH papers in dark and dry place. For more of our products of lab equipment and glassware: Please click here to visit our eBay shop: MESE-LtdCondition:New, MPN:Does Not Apply, Brand:Unbranded/Generic
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pH Indicator Paper Test Strips, 1 to 14 pH Range; 200 Strips in a tidy case