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The History of Sequoia – Part IX

June 2, 2022

…Wherein we’ll learn about the LISST-Holo and what else happened in the late 2000’s! (Part VIII can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-viii/) At the PiE 2008 meeting, one of the presentations was by a young...

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On the Feasibility of Measuring Plastic Particles in Situ

November 27, 2019

As reports over the last 3-4 decades demonstrate increasing plastic concentration in the oceans, public and regulatory concerns have grown in parallel. Sequoia Scientific Inc. and other instrument manufactures are thus frequently contacted by scientists...

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Flocculation or Drift?

August 3, 2016

While testing a LISST-ABS in the laboratory with field samples, Dr. Benjamin van der Waal of Rhodes University in South Africa noticed an apparent instrument drift. He was using samples extracted from a river for this testing, so that the samples were...

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Turbidity vs Laser Diffraction – why LD is better

April 29, 2016

Last updated: 11 May 2016  Turbidity as a surrogate for suspended sediment concentration (SSC) is commonly used and deeply established in practice. The shortcomings of turbidity as a surrogate for SSC are: The calibration changes with grain size; The...

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