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Sodium hydroxide is a key chemical used in the delignification of wood fibres in the kraft pulping process in addition to being used in a number of stages in the bleaching process.


On-line continuous measurement of sodium hydroxide can be made using near infrared (NIR) spectroscopy as sodium hydroxide absorbs selectively at ca 1300 nm. A second wavelength can be used to correct for both turbidity and sensor fouling.


The Kemtrak DCP007NIR photometer is suited for the monitoring of sodium hydroxide. Please contact a Kemtrak sales representative for additional information.


In-line liquid and gas concentration measurement - Kemtrak DCP007 NIR near infrared industrial process fiber optic photometer