Please Note: If high levels of hydrogen sulphide are present in the water sample (as is the case with some raw water samples) please expose the water sample to air for eight hours before doing the arsenic test in order to prevent an arsenic test "eruption" in your classroom!
Instructional Video:
Purpose: To determine the arsenic concentration in drinking water from 4 different sources, plus a Proposed Canadian Guideline Limit Sample for quality control purposes.