Metallised quartz filters that reflect rather
than absorb are also available for use as
absorbance standards in the UV; in using
these particular care must be taken in testing
for isochromatic stray light because of the
likelihood that these filters may introduce
stray light, particularly in the grade of
laboratory instruments used for routine
analysis. These filters may also introduce
multiple reflections with other components
and must be handled with care because as
surface devices they are vulnerable to
scratching.Notwithstandingthese
comments, filters of this type have
demonstrated stability and have application
in the UV spectral range.