It seems to be quite sensitive, down to the nanogram level. This paper has some more details: https://pubs.acs.org/doi/full/10.1021/acs.est.3c06058 https://pubs

It seems to be quite sensitive, down to the nanogram level. This paper has some more details: https://pubs.acs.org/doi/full/10.1021/acs.est.3c06058 https://pubs.acs.org/doi/full/10.1021/acs.est.3c06058 Some of the authors of that paper founded Lumetallix.