Reliable Instruments for an Unreliable World

  • Grey Twitter Icon
  • Grey Facebook Icon
  • Grey LinkedIn Icon
  • Grey YouTube Icon

Absorbance measurements are used for calculating concentrations of carotenoids such as Fucoxanthin, a dominant pigment in diatoms, or Peridinin, a diagnostic pigment of dinoflagellates. Absorbances are also used for calculating concentrations of fluorescing pigments such as chlorophyll a, b, or c. Other absorbance applications include the determination of chemicals/nutrients in water systems (i.e.Nitrate, Silicate, Phosphate, Ammonium, etc). 


Absorbance is a measurement of light absorption by solid, liquid or gas. The electrons of the atoms in the absorbing substance reduce the amount of light being passed through that material. As the quantity of atoms increases so does the reduction of photons being transmitted. Beer's Law states that the amount of light transmitted by the sample is proportional to the concentration of the absorbing species and the path length traveled by the light.



Absorbance Theory & Application
Absorbance Overview



Nitrate Analysis
Nitrate Comparison Data
Nitrate/Nitrite Reagents and Test Procedures Adapted from Strickland and Parsons (1968)
Nitrate/Nitrite LaMotte Test Kit Procedure


Silicate Application Note


Phosphate Application Note

Available Instrumentation
Show More
Stay Connected
Contact Us

Toll Free: 1-877-316-8049

Phone: 1-408-749-0994

1995 N 1st Street
San Jose, CA 95112-4220

ISO 9001:2015 Certified | Copyright © 2018-2020 Turner Designs, Inc. All rights reserved.