Taking Your Readings
We will be measuring all samples in ABSORBANCE.
1. Select a measurement wavelength (this will be given to you in your lab manual)
2. Select the MODE: ABSORBANCE
3. Wipe the cuvette (or test tube) with your BLANK solution with a kimwipe to remove fingerprints.
Holding the cuvette at the top, insert the blank into the cell holder with the clear walls of the cuvette
lined up with the light path (arrow) (if not using cylindrical glass test tubes).
Remember - setting the blank is like hitting the TARE button on a balance! The blank is used to zero
readings due to imperfections in the cuvette and for the absorbance of light by the medium or carrier
solution.
3. Place your BLANK CUVETTE in the measurement position, close the lid and press the yellow
"AUTOZERO" (blank) button. You will see ABS = 0.000
4. Remove the blank cuvette and place your first sample cuvette in the measurement position and
close the lid.
5. Live measurements begin automatically. Record the value(s) as instructed.
TIPS: Cover cuvettes / test tubes with parafilm and invert to mix before placing in the
spectrophotometer. Always treat all samples in the same way, taking your reading immediately
unless otherwise instructed.
How to Use the GENESYS 30 Spectrophotometer
How to Use the GENESYS 30 Spectrophotometer
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