1)Filter
based UV-vis detector – Typically
set at 254 nm using the
most prominent band in Hg
spectrum – can also use 313, 365,
334 nm and other lines as well
2)Variable
wavelength detectors – use continuum source like (D2 or H2) & a monochromator,
select any l,
less sensitive
3)PDA
- D2 or H2 source, disperse & focus on
diode array, get complete spectrum every 1 sec, powerful,
expensive, less sensitive, lots of data generated