Saxitoxin (PSP) Lateral Flow Kit (Freshwater Streams and Source Water)

Saxitoxins (STXs) are naturally occurring alkaloids produced by some marine dinoflagellates and by strains of various species of freshwater cyanobacteria.  Saxitoxin is one of the prevalent paralytic shellfish toxins (PSTs). It belongs to a family of potent neurotoxins with a molecular weight around 300 Da. Saxitoxin and its derivatives are alkaloids composed of a tetrahydropurine ring system with a highly polar guanidinium group. Due to their significant toxicity, saxitoxins are closely monitored in marine environments where they can accumulate during harmful algal blooms (HABs).  In 2009 an action level of 0.6ppb (600ppt) was recommended by EFSA as a guidance framework have been established to manage saxitoxin levels in water.