UV-VIS and FLOURESCENCE
INSTRUMENTATION
WE ARE GOING TO EXPLORE:
UV-VIS
Instrumentation aspects of FLOURESCENCE
PHOSPHORESCENCE
UV-VIS
INSTRUMENTATION
Single beam UV-VIS spectrophotometer Double beam UV-VIS spectrophotometer
chem .iit bombay
Indiamart.com
UV-VIS
INSTRUMENTATION
LIGHT SOURCEMIRRORSMONOCHROMATORBEAM SPLITTER*
SAMPLE CELLS /
CUVETTES
DETECTORAS SIMPLE AS THAT
Jd.com Tuopeek.com
Tunsten halogen lamp Deuterium discharge lamp
An ideal monochromater should possess:
1)high peak transmittance
2)low band pass
absorption filters
Filters
interference filters
refractive type
prisms
reflective type
Gratings are preferred over prisms because they are resistant to moisture
and also because of their low band pass of 0.1nm. Also there is no
energy loss due to absorption in gratings.
CAN U HELP
ME REACH THE
DETECTOR?
UV-VIS INSTRUMENTATION
BLOCK DIAGRAM
LIGHT
SOURCE
MIRRORS
MONOCHR
OMATOR
RECORDER
SAMPLE
TUBE(S)
DETECTOR
BEAM
SPLITTER
DOUBLE BEAM –IN SPACE SPECTROPHOTOMETER
mientayvn.com
DOUBLE BEAM –IN TIME SPECTROPHOTOMETER
Chemguide.in
Differences b/w single and double beam
spectrophotometers:
1) Number of beams
2) Reliable absorbance values
3) High quality components
• Handling voltage fluctuations
• Handling time dependent irregularities
4) Complexity of instrument
5) Speed
APPLICATIONS
• In calculation of Molar absorptivity (Ꜫ) of a substance
• Detection of functional groups
• In Dye degradation studies
• Detemination of unknown concentration using calibration plot
• In Ion sensing studies ( e.g. fluoride sensing)
LUMINISCENCE
FLOURESCENCE
PHOSPHORESCENCE
CHEMILUMINISCENCE
BIOLUMINISCENCE
………………
FLUORESCEIN
chemistryworld.com
Wikipedia
Wikipedia
FLOURESCENCE
INSTRUMENTATION
Jas coinc.com
FLORESCENCE SPECTROPHOTOMETER
Excitation
wavelength
selector
sample
Emission
wavelength
selector
Transducer
Electronics/
computer data
system
Transducer
Beam
attenuatorsource
Ins.analysis by skoog and etal
“TEST IS MY TASTE” says
Ultraviolet & flourescence spectroscopy instrumentation

Ultraviolet & flourescence spectroscopy instrumentation