The purpose of the Duckweed growth bioassay is to investigate the effect of varying arsenic concentrations in water on the growth rate of plant life. This slideshow will give a walkthrough of the preparation of a sample based in a 50 ppb arsenic solution. The full protocol uses triplicates of samples based in 0, 50, and 100 ppb arsenic solutions. The samples should be left to sit for a few days, with regular monitoring and re-counting of the duckweed leaves to track change.
