Erun Environmental Protection Hexavalent Chromium Water Quality Tester special reagent, one set contains 1 bottle of liquid, 1 pack of solid, take 1 small pack of hexavalent chromium 'reagent A' in a small beaker, add 5.0ml hexavalent chromium 'reagent B', stir until completely dissolved. One set of reagents can be used 100 times, and is sealed and stored at room temperature and away from light.
