13 Wine Analyser Based on FT-IR Spectroscopy
At Analytica 2010, Bruker Optics announced a new dedicated, turn-key analyser for the quality control of wine, based on its well-established, award-winning ALPHA Fourier transform infrared (FT-IR) spectrometer.
ANALYTICA NEWS
FT-IR spectroscopy is a popular technique that is commonly used for the quality control of wines. Compared to other wet- chemistry and separation techniques, FT-IR allows wine makers to monitor various parameters within a single measurement run.
The new ALPHA Wine Analyser opens new dimensions for improved wine analysis, using the ATR (Attenuated Total Reflection) FT-IR sampling technique that only requires a drop of wine for analysis. Traditional infrared spectroscopy based wine analysers have
relied on transmission sampling techniques, where the results were affected by the thickness of the sample cell. FT-IR spectroscopy utilising ATR is significantly less sensitive to particles and gas bubbles in the sample, providing more reliable and robust results.
The ALPHA Wine Analyser, with its new measurement technique does not require any time-consuming sample preparation process, for example, samples can be directly deposited onto the sampling area, and the results are ready in seconds. The software automatically calculates the concentration of the quality parameters such as alcohol, density, pH, various sugars and acids.
Bruker Optics collaborated with leading wineries and wine research centres all over the world to develop the start-up calibrations for the ALPHA Wine Analyser, which can easily be adapted to individual needs. The user can optimise existing calibrations, can add new parameters to improve calibrations, or create new calibrations based on entirely new products like ‘must’, ‘must under fermentation’ or ‘finished wine’.
The ALPHA Wine Analyser is a very compact, lightweight system that can easily be transported to different locations. The ALPHA Wine Analyser offers a variety of operation modes: manual, semi-automated and fully automated with an autosampler. The instrument is easy to operate, offers low cost of ownership, and the cleaning of the sampling module does not require any solvents or consumables. The ALPHA can also be used in the laboratory to measure a variety of different samples like juices, oils, or even sediments and solids.
Circle no. 29 Entry-level Spectrophotometers Narrow the Bandwidth and Footprint
Jenway’s new 73 series spectrophotometer range provides entry-level instruments with a narrower spectral bandwidth of 5nm and an improved absorbance range of –0.3 to 2.5A, all within an innovative space-saving design. The patent pending design of the 73 series cleverly minimises the overall footprint of the instrument by incorporating the large graphical display into the instrument’s lid. The easy-to-read display is ideal for demonstrations and enables live spectrum and kinetics scans to be clearly viewed. The instruments have the additional option of an integral printer, for further space saving – an important benefit in situations, such as teaching laboratories, where bench space is at a premium.
All four models are supplied with free bi-directional PC software. The advanced models, 7310 and 7315, also have the additional feature of an easy access USB port on the front of the instrument, which enables results and methods to be saved directly to a USB memory stick. The new range includes four spectrophotometers; models 7300 and 7310 cover the visible region of the spectrum; models 7305 and 7315 use a flash xenon lamp to extend the wavelength range into the UV region of the spectrum. The 73 series has been designed to enhance productivity by offering an extensive range of accessories, including an automated 8-cell turret, sipper and peltier pumps, adjustable path length holders, test tube holders and micro-cuvette holders. The 73 series spectrophotometers are all covered by a 3-year warranty that includes the xenon lamp. Other benefits from this new range include icon-driven software, autologging capabilities and an easy, intuitive navigation system. The 73 series spectrophotometers are ideal for use in education and routine quality control applications.
Circle no. 30 ADVERTORIAL Is Environmental Screening Good for the Environment?
Every day, all around the world there are thousands of gas chromatographs continuously analysing environmental samples, the majority of which will give a negative result. It is estimated that worldwide GC’s running environmental samples could be using as much as 1.4 gigawatt hours of energy and producing 840 tonnes of CO2 every single day. To put this into perspective an average 1.6 litre family car would need to drive around the circumference of the earth over 116 times to produce the same amount of CO2. The amount of CO2 produced could be greatly reduced by using energy efficient fast GC technology for screening samples. The 300 Series Fast GC from Cambridge Scientific Instruments directly heats the column rather than using a conventional air blow oven. As only the column itself is being heated, considerably less power is required and the heating/cool down times can be much more rapid.
A typical GC with a power consumption of 2200 VA running an application with a heating time of 20 minutes would be producing
approximately 300 g of CO2 per sample. A 300 Series Fast GC with a power consumption of only 850 VA is able to run an equivalent analysis, but thanks to its much faster heat up and has a run time of only 3 minutes. So not only is the 300 Series fast GC using less energy, but what power it does require is for a much shorter amount of time.
All together this mean the 300 Series GC
produces approximately 17 g of CO2 per sample making it nearly 20 times more energy efficient.
For further information on the 300 Series Fast GC please visit
www.camsci.co.uk or if you would like to talk someone about your chromatography requirements please call 01353 669916.
Circle no. 31 Circle no. 32
INTERNATIONAL LABMATE - APRIL/MAY 2010 - CHROMATOGRAPHY & SPECTROSCOPY
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