Product category:
Non-contact, Optical and Laser measurement systems
News Release from: Aspectrics | Subject: NIR analyser
Edited by the Manufacturingtalk Editorial
Team on 09 March 2007
NIR analyser precisely measures ethanol
in water
Aspectrics has introduced an application note detailing methods for MultiComponent 2750 EP-NIR analyser achieving precise measurement of water in ethanol when concentrations are 90% or greater.
Aspectrics, the innovator of patented Encoded Photometric Infrared (EP-IR) spectroscopy technology, introduced an application note detailing that its innovative MultiComponent 2750 EP-NIR analyser achieves precise measurement of water in ethanol, particularly when ethanol concentrations are 90% or greater Determining the percentage of water contained in ethanol is especially important during the purification process of ethanol when the percentage of water needs to be minimized for ethanol to be as absolute as possible
This article was originally published on Manufacturingtalk on 28 May 2007 at 8.00am (UK)
Related stories
Encoded photometric near-IR analyser for biofuel
Aspectrics has extended the capabilities of its MultiComponent 2750 EP-NIR analyser to include quality assurance measurements of biofuels.
Analyser provides exact measurements of biodiesel
Aspectrics has introduced an application note demonstrating the ability of its MultiComponent 2750 EP-NIR analyser to provide accurate measurements of biodiesel in B0 to B100 diesel blends.
Designed to respond to scientists' needs working in the process industry, this is an efficient and cost-effective solution for measuring water content in ethanol.
The innovative EP-NIR analyser will be showcased on stand 4417 at PITTCON 2007, McCormick Place, Chicago, Illinois, February 26- March 1, 2007.
The application note entitled "Measurement of Water in Ethanol- Using an Aspectics MC2750 EP-NIR for Concentrations of Ethanol Greater Than 90% v/v" shows how the Aspectrics MultiComponent 2750 EP-NIR analyser, when coupled to an external halogen NIR source and an extended range 2mm pathlength process transmission multimode fibre probe, is able to quantify the percentage volume of water in ethanol.
Further reading
Application note for EP-NIR spectroscopy
Aspectrics has produced an application note showing that its MultiComponent 2750 EP-NIR analyser achieves simultaneous measurement of water, methanol and total glycerin in B100 biodiesel samples.
IR analysers integrate with spectroscopy software
Aspectrics has announced a collaboration to integrate Thermo Scientific's GRAMS spectroscopy software with Aspectrics' Encoded Photometric Near Infrared process analysers.
The findings of this analysis are detailed in the new, free-of-charge application note available to download.
All spectra were collected using Aspectrics' RTSS Chemometrics software package.
Denatured corn-based ethanol samples diluted with distilled water to concentrations ranging from 0.2 to 10.0% were used.
In order to quantitate unknown samples, a multivariate Principal Component Regression (PCR) quant model was developed from the NIR spectra of all samples.
The results of the analysis demonstrated strong correlations between concentrations in the spectral range of 1.4-1.55 nm and 1.85-2.00 nm and in the C-OH region between 2.00 and 2.2 nm.
The precision of the calibration may be ascertained through the RMSEP of the validation set, which was 0.14% v/v.
At the maximum concentration for water, this value is consistent with the precision of the reference method (1.2% relative).
A majority of this deviation originates from the 8.0% sample, which suggests a pipetting error during sample preparation.
Furthermore, the experiment highlighted that the accuracy of study is highly dependent on the precision of the reference method.
The new application further stresses the unique capabilities of the MultiComponent 2750 EP-NIR analyser, which has already demonstrated a high degree of sensitivity due to extremely low instrumental noise, long-term photometric response stability and superior scan to scan wavelength reproducibility.
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