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The WaterWorks™ Hydrogen Sulfide has detection limits From 0 to 2 ppm (mg/L) with a low sensitivity of 0.3ppm (mg/L). With this test, the strip is inserted into the aqueous sample for 20 seconds with back and forth motion. After 20 seconds, the strip is removed and discarded. The remaining discolored sample is compared to the color chart specific for this water quality test.
For best results, run test immediately after collecting a fresh water sample. Hydrogen Sulfide (H2S) is characterized by a “rotten egg” smell and is very deceptive in that it paralyzes the olfactory nerves so that, after a short exposure, one does not smell it. People working with high concentrations of H2S have died because their sense of smell provided no warning. Therefore, testing regularly is important.