@article {Woodriff:1973-05-01T00:00:00:0003-7028:181, author =
"Woodriff, Ray and Shrader, Douglas", title = "A New Dual Wave-
length Spectrophotometer", journal = "Applied Spectroscopy",
volume = "27", number = "3", year = "1973-05-01T00:00:00",
abstract = "The design, construction, specifications, and
operation of a new dual wave-length spectrophotometer are
presented. The instrument utilizes only one fixed grating and
mobile exit slits with photomultiplier light sensors. Two wave
lengths can be monitored and both channels may be scanned,
simultaneously and independently. The spectrophotometer has been
integrated into an atomic absorption system which includes a
Woodriff furnace and Ithaco dual channel lock-in amplifier. The
two channels may be used separately (A and B) or may be ratioed
(A/B). Calibration curves were obtained for Ag and Pb. Results
are given for the determination of Ag in a complex water sample
requiring background correction using the ratio (A/B) mode and
for the simultaneous determination