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Stop guessing shades of red, orange, purple, … new optical sensor for automated photometric titrations

publication date: May 27, 2014
author/source: Metrohm AG

Many titrations are still often performed manually because regulations require a titration to continue until the color changes; in other words, the endpoint must not be indicated by a pH electrode or a metal electrode. Guessing shades of red, orange, purple, etc., however has an end, as such titrations can now be automated with a new optical sensor, the Metrohm Optrode.

Photometric-endpoint-recognitionThe optrode features eight different wavelengths for a wide measuring range, it is 100% solvent resistant thanks to a glass shaft, and it is very easy to handle.

The new photometric sensor can be used for many applications. Typical applications include:

  • Photometric titrations in accordance with USP and Ph. Eur. (nonaqueous)
  • Determination of carboxyl end groups (nonaqueous)
  • TAN/TBN in accordance with ASTM D974 (nonaqueous)
  • Chloride in silicone products (nonaqueous)
  • Sulfate determination
  • Fe, Al, Ca in cement
  • Water hardness (total hardness and Ca/Mg)
  • Chondroitin sulfate in accordance with USP

The Optrode can be used on both new and existing Metrohm titration systems as well as on titrators from other manufacturers.

find out more

more news from Mertrohm


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