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Ethylene: Diethylene Glycols On-Line Monitoring with a ClearView™ Photometer

From Guided Wave, Inc.
 

 

To replace a gas chromatograph (GC) by continuously measuring the amount of ethylene glycol in diethylene glycol using a near infrared (NIR) ClearView™ fiber optic filter photometer.

Background: It is not obvious, even to many NIR practitioners, that NIR can make more subtle distinctions among closely related compounds. As a result, it is often thought that a process GC is required. Experimental: Our PS¬-2E diode array spectrometer was used to measure the NIR spectra of ethylene:diethylene glycol (EG:DEG) mixtures. Two meters of low-OH fiber optic cables were used and the samples were measured in a 10 mm glass cuvette at room temperature.

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)
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)
StellarNet, Inc. - Dual Detector Spectrometers
The StellarNet DUAL-DSR spectrometers are fiber optically coupled instruments that cover a "Super Range" from 0.2-2.3um for spectroscopy measurements on a PC via USB-2 interface. The spectrograph... (read more)
StellarNet, Inc. - StellarNet InGaAs Extended Range Spectrometers
StellarNet has announced the NIRX-SR series of spectrometers for the 0.9-2.3μm wavelength range with a 512 element InGaAs Photo Diode Array and high speed USB-2.0 interface. The extended range... (read more)
Strong Hold Products - Clearview Model 46-LD-244 Cabinet
This model contains clear polycarbonate windows for viewing items stored inside. Also, these cabinets can be purchased with scratch resistant polycarbonate windows. As always, extra shelves are... (read more)
JASCO - JASCO's Portable FT-IR System-VIR-9000 Series
The VIR-9000 series is a compact, lightweight, flexible FT-IR system. The collimated entrance and exit ports make it an ideal instrument for a wide range of applications. The standard instrument... (read more)
Shimadzu Scientific Instruments, Inc. - GCMS-QP2010 Plus
Shimadzu's GCMS-QP2010 Plus is the most innovative and powerful model on the market. Ideal for rapid analysis of difficult samples, and determination of trace components, the GCMS-QP2010 Plus expands... (read more)
Fiberoptic Systems, Inc. - Machine Vision Lighting
Fiberoptic Systems is a manufacturer of machine vision lighting system including ringlights. These products are used to obtain bright white light on the object being examined. Also manufacturer of... (read more)
Malvern Instruments, Inc. - NIR Analyzer - Spectral Dimensions SyNIRgi ™
The SyNIRgi, a new Near Infrared chemical imaging (NIRCI) product, builds on the highly successful Spectral Dimensions Sapphire/NIRCI-2450 platform. Rugged instrumentation with no moving parts,... (read more)
 
Topics of Interest
Purpose: To determine water content in acetic acid with sample temperature correction. Approach: The PS¬-2 NIR diode array spectrometer was used to measure the near-infrared spectra of 0-15% water in... (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)
To determine APHA color on-line for process control or in the lab for product release. Aproach: An Optical Solutions' PS-2-UV/VIS diode array spectrophotometer and HeaterCell™ fiber optic... (Read More)
Purpose: To determine water content in ethylene glycol (EG) without sample temperature control. Experimental: Our PS-2E NIR diode array spectrometer was used to measure the NIR spectra of 0 to 6%... (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)