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NIR Water Measurements Online Monitoring in Liquid Samples

From Guided Wave, Inc.
 

 

Water is perhaps the most common measurement made in the nearinfrared (NIR). This is due to its strong effect on product properties and chemical reactivity of the starting materials. From an analytical perspective, water is easy to analyze due to its relatively strong signal compared to the hydrocarbon background. Moreover, because water is commonly analyzed with a single wavelength, photometers are the instrument of choice. The purpose of this application note is to show you how we arrive at recommending a system, that is, a photometer with the proper wavelengths and a fiber optic probe with an appropriate sample path length.

Product Announcements
Polytec, Inc. - NIR Spectroscopy for Process Control
Near Infrared (NIR) spectroscopy is used for fast, reliable, and non-destructive measurements that simultaneously control manufacturing processes and product quality, assuring that final product... (read more)
JASCO - V-600 Series UV/Vis Spectrophotometers
JASCO is proud to announce the release of our new V-600 Series of UV/Vis/NIR spectrophotometers. These units feature a rugged and compact design, excellent optical performance, high speed scanning,... (read more)
Hamamatsu Corporation USA - NIR PMT Module- Thermoelectrical Cooling System
Bridgewater, New Jersey – October 1, 2007 – Hamamatsu Corporation has introduced a new near-infrared photomultiplier tube (NIR PMT) module with easy handling, low noise, and a... (read more)
Lovibond® Tintometer® - One Scale Colorimeter for the Brewing Industry
The EBC colour scale, developed by the Institute of Brewing and the European Brewing Convention, is a recognised method for colour grading of beers, malts and caramel solutions as well as similarly... (read more)
StellarNet, Inc. - GREEN-Wave Spectrometer
The new miniature GREEN-Wave fiber optic spectrometers measure light. 15 models cover the UV-VIS-NIR wavelength ranges from 190-1150nm. Detector options include 2k/3k element CCD or PDA arrays with no... (read more)
StellarNet, Inc. - BLACK-Comet (Concave Grating) Spectrometer
StellarNet, Inc. has announced its BLACK-Comet series of Concave Grating Spectrometers. (read more)
Advanced Technical Services GmbH - Magnesium Analysis by Flame Photometry
ATS 200S Science/Industry High Performance Flame Photometer with Mg: multi-channel analyser for simultaneous and instantaneous measurements of Na, K, Mg, and Ca, in ca. 5 seconds in a single sample... (read more)
Avantes - Near-Infrared Fiber Optic Spectrometer
The AvaSpec-NIR256 Fiber Optic Spectrometers is based on the AvaBench-50 symmetrical Czerny-Turner design with 256 pixel InGaAs Detector Array. The spectrometer has a fiber optic entrance connector... (read more)
JASCO - V-7000 Series Spectrometers
The new V-7000 series is Jasco's latest UV-Vis-NIR spectrophotomer, offering unsurpassed optical performance through the latest electronics, optics and NIR detector technologies. (read more)
 
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)
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)
Purpose: Replace on-line GCs for rapid control of a styrene purification column by measuring styrene at two points using a Simulplex™ ChemView®. Background: The first point is from the... (Read More)
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... (Read More)
Objective: Measure water to better than ±0.01% (wt.) in an aromatic liquid mixture with a Chem- View® photometer. Experimental: Samples were measured in a 5 mm cuvette in our HeaterCell fiber... (Read More)