6 Environmental Analysis New, Improved 128 Pixel Variable Filter Array IR Spectrometer
Wilks Enterprise (USA) has introduced a new InfraSpec VFA-IR Spectrometer with a 128 pixel detector array that provides expanded capabilities and better performance, including 75x increase in signal-to-noise ratio, 1.5x improvement in spectral resolution, and updated calibration wizard with Chemometric PLS capabilities.
The InfraSpec VFA-IR Spectrometer represents a new concept in mid-IR instrumentation which utilizes a detector array with linear variable filter. This results in a compact, portable spectrometer that has a number of advantages over conventional Infrared instruments such as the widely-used FT-IR Spectrometer. These advantages include no optical path through air, no moving parts, light weight (under 5 lbs), portable (battery operated), rugged, and low cost. The InfraSpec VFA-IR Spectro-
meter will supplement FT-IR capability in plant or field locations where it is not feasible or economical to use FT-IR instruments. It is designed to provide spectral data on a wide variety of samples, as well as numeric concentration data with a Pass/Fail material verification display. It is ideal for such applications as process monitoring (PAT), quality control, materials verification, environmental testing and biofuels analysis. Standard spectral ranges include 2.5 - 4.8 µm, 5.4 - 10.8 µm, and 7 – 14 µm. The patented InfraSpec VFA-IR Spectrometer consists of an ATR sample plate or transmission sample stage with an elongated, pulsable source mounted close to one end and a linear variable filter attached to a detector array mounted close to the other end. The spectrometer is usable in plant, field and laboratory environments. The InfraSpec VFA-IR Spectrometer can be used like an FT-IR Spectrometer; however, much of the software program has been geared towards repetitive process analysis applications. The dedicated software provides a range of spectral processing functions and can be calibrated for quantitative analysis or materials verification. An optional simplified interface provides numeric or pass/fail results designed to be operated by personnel having little or no knowledge of infrared analytical techniques.
Reader Reply Card no 27
Exporting Products to the EU? Import the PANalytical X-ray Advantage First!
X-ray fluorescence (XRF) spectroscopy has emerged as an optimal solution for the screening of toxic heavy metals regulated by the EU Directives RoHS (Restriction of Hazardous Substances) and WEEE (Waste Electronic and Electrical Equipment). To help customers who export goods to the EU meet increasingly complex environmental regulations, PANalytical (The Netherlands) delivers the advantage of 60 years experience in X-ray analysis and implementation, as well as dedicated instrumentation and calibration sets.
Now, the introduction of a new international standard (ASTM International standard F2617-08, announced 26 September 2008), uses XRF analysis for routine testing of toxic heavy metals in homogeneous polymers. The implementation of a RoHS/WEEE energy dispersive X-ray fluorescence (EDXRF) spectrometer, such as PANalytical’s dedicated MiniPal 4 RoHS WEEE, provides a straightforward, robust method for the analysis of RoHS elements. All products destined for the EU must comply with RoHS/WEEE directives and REACH (Registration, Evaluation, Authorisation and Restriction of Chemical substances) regulations. While the responsibility of ensuring product and component compliance lies with producers and distributors, help is at hand. PANalytical’s global team of representatives can provide local advice on elemental analysis solutions and the
management of quality control costs. Reader Reply Card no 29
How Fresh is the Fish? Determining Biogenic Amines in Fish by Ion Chromatography
Sea fish has a notoriously short freshness span between catch and degredation. This is why maintaining the freshness of the fish throughout the production chain presents a major challenge to the fishing industry. A simple ion chromatographic method using conductivity detection helps to meet this challenge. It does not require an elaborate derivatisation and allows the simultaneous determination of dimethylamine, trimethylamine, trimethylamine N-oxide, histamine, putrescine and cadaverine. 5 g of sea fish is mixed with 50 mL acetate buffer pH = 4.8 and homogenised with a dispersing instrument. The sample solution is filtered and subsequently injected
automatically using an IC Sample Processor. Three spiked samples are prepared in the same way by adding 300, 500 or 700 µL of mixed amine standard to the fish prior to sample preparation. The system and the IC method are checked using various standard solutions as well as a sample solution spiked after sample preparation. The determination of the amine concentrations is always carried out by calibration with external standards (7-point calibration). A kit for testing 10 sea fish samples is available from Sigma-Aldrich Chemie GmbH (formerly Fluka; Fluka no. 53851). This kit has been developed in cooperation with Metrohm (Switzerland) and includes the IC precolumn, the reagents for the eluents as well as the buffer and the standard solutions.
Reader Reply Card no 30 October/November 2008 AET
Suspended matter in liquid samples have to be removed before injection by filtration, in order to protect the analytical instruments and columns. Therefore, Machery Nagel (Germany) offers a broad range of colour coded 25, 15 or 3mm diameter Chromafil®
disposable filters, with
a solvent resistant polypropylene housing and different membranes like cellulose mixed esters, cellulose acetate, regenerated cellulose, polyamide, PTFE, polyether sulfone, polyester and PVDF.
For a better storage, visual control of fill-up quantity and more safety during transport they offer a new crystal clear packaging for the 15 and 25 mm diameter filters.
Reader Reply Card no 31 Renaissance of the Multidimensional GC Method
Shimadzu (Germany) introduces the new multi- dimensional MDGC-2010. The system serves a wide range of applications in environmental and food analysis or other complex sample type analyses. This multiple heart- cut multidimensional system was particularly designed for the transfer of co-eluting peaks to a second column (“cut”) and makes quantitation very easy. The MDGC-2010 represents the renaissance of the multidimensional GC method. It applies the well-known Deans Switch technology, but in a totally different way than in the past. Using different restrictors, the pressure at the end of the first column always remains constant, whether or not a cut is used. It is a real breakthrough that the user may perform as many cuts as required without any shifts of retention time and with excellent precision of the retention times. This allows for easy method development. Just three steps are needed to set up a multidimensional method:
1) Run the standard (1 run). 2) Define the cut times graphically in the specially developed MDGCsolution software.
3) Run the sample.
Quantitation of co-eluting peaks: Quantitation with the MDGC-2010 system is very easy. A calibration curve can be run using the cut times with a standard sample. Calibration curves are calculated in a conventional way by integration of the peaks in the chromatogram from the second column.
GC meets GC-MS: All operation parameters for multidimensional chromatography are controlled via the MDGCsolution software. All conventional GC detectors as well as the extremely sensitive and fast GCMS-QP2010 series instruments can be used for detection, making the system even more powerful by using full mass spectral information.
Reader Reply Card no 28
New Crystal Packing for Disposable Filter
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