MeasureNet's Versatile Colorimeter Part 3
#3) TURBIDIMETRIC / NEPHELOMETRIC LIGHT-SCATTERING SPECTROMETRY
The “Colorimeter” can also be used in the “Turbidometer” mode… or more precisely, as a “Nephelometer”, since nephelometry uses a Near-IR LED (@ 880nm) to measure the SCATTERED light at a 90° angle from the light source, as it is done on the MeasureNet unit. Tests can be made on sample solutions that have existing particulate suspensions… or a reaction can be made to produce a range of particulates for relative and direct measurements. Originally used for Clinical Chemistry applications, Turbidometry/Nephelometry can be applied to a wide range of curriculum subjects… from Organic Synthesis & Analytical Chemistry to Environmental & Biochemistry Labs. Some of these unique and educational labs are shown here:
Turbidity (“Nephelometry”) for Kinetic & Relative Comparison at Single values:
• Environmental Testing of “Settleable Solids” for River / Stream & Estuarial Waters
• Reducing Sugars by Benedict’s Test... great for Diabetics, Atkins-Diets and all the rest!
• Collect some of the DUST from your “Air”… is it okay to breathe or is something there?
• Rate of Reaction of Silver Ion + Chloride Ion to form AgCl precipitate… Kool Kinetics!
• The classic Princeton “Nassau Clock” Reaction… makes for a great teaching Lab attraction!
• Measurement of Yeast Growth in Beer… is it fermenting slow or in high-gear?