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Caustic in Water with a ClearView™ Filter Photometer System

From Guided Wave, Inc.
 

 

Purpose: To measure NaOH concentration in water on-line with the no moving parts ChemView® filter photometer and a fiber optic flow probe for a slip stream.

Approach: There are several ways to analyze a mostly aqueous stream. Water is an intense absorber in the NIR, requiring small optical paths, which may plug or entrain bubbles. The spectral signals also change considerably with temperature. We have selected one wavelength at 1290 nm for calibration of NaOH that best addresses these issues. It does not change significantly with temperature and it allows a 1 cm optical path to be used in the fiber optic probe. Several reference wavelengths can be used (at lower wavelengths). It is still advisable to heat trace a slip stream to minimize temperature fluctuations for optimal performance.

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Topics of Interest
Purpose: To simultaneously measure caustic (NaOH) and sodium carbonate in aqueous process streams, particularly at low (<2%) caustic concentrations, using a ChemView® NIR photometer and fiber... (Read More)
Reliable, affordable, real-time identification of petroleum products flowing in pipelines to minimize waste and assist in transitions. Experimental: ClearView™ fiber optic filter photometer. (Read More)
Purpose: To determine water content in a white polymer liquid containing TiO2 using a near-infrared (NIR) Chem-View® photometer and fiber optic reflectance probe. Approach: Samples were mixed... (Read More)
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