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Analytical Instrumentation
Cost-effective, Rapid and Simple Analytical Solution for Sulphur in Petroleum Products
The Energy Dispersive XRF (EDXRF) Lab-X3500 from Oxford Instruments (UK) is a compact bench-top analyser that can be used in the lab, field, mobile laboratory; in fact where ever you need on site analysis operated by production staff and with full conformance to ASTM D4294.
The EDXRF X-Supreme8000 offers multi-sample analysis for “ultra low sulphur” (<10ppm) up to 5% covering all sample matrix types. In addition, the X-Supreme8000 has the flexibility to measure additional elements such as Nickel and Vanadium in fuel oil. These instruments are world renowned for simple installation, long term reliability and ease of use. This is achieved through close attention to detail on high quality design and manufacture.
Both the X-Supreme and Lab-X can be located anywhere, wherever confirmation of sulphur concentration is required for regulatory purposes. With X-ray tubes optimised for sulphur determination and running at minimal power all help ensure long service life, typically over ten years, leading to extremely low running costs.
Dedicated application packages cover different analytical requirements. For Ultra Low Sulphur determination (< 10mg/kg) the various ISO/ASTM test methods recommend the measurement of two aliquots (portions) of sample when measuring sulphur concentrations below 100mg/kg. On the X-Supreme8000 the software “requests” two aliquots are placed on the sample carousel, measurements are sequentially taken and the average and individual sulphur concentration results are displayed. Background “SmartCheck” software routines automatically check a number of customer defined parameters, for example; the difference in sulphur concentration between aliquots; and should the results be outside tolerance, a warning message is displayed. This all leads to high quality analysis, often with the analysis carried out by production staff.
In addition to Sulphur, other elements can be measured with equal ease, for example; chlorine in platforming catalyst, lead in gasoline etc., providing a cost-effective, dependable and flexible analytical solution.
For those customers requiring sulphur analysis to ASTM D2622 Wavelength Dispersive XRF (WDXRF) the MDX1000 offers simultaneous elemental analysis. Superb reliability is achieved through employing two fixed monochromators, thereby avoiding any moving parts.
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Miniflash Touch Portable Flashpoint Tester World Class Flashpoint Testing at Your Fingertips
Grabner Instruments (Austria) launches Miniflash Touch, its new analyser for easy and safe flash point testing. Miniflash Touch is the latest addition to the Grabner Instruments line of portable flashpoint testers, that combines all of the field- proven advantages of the Miniflash tester line with a new convenient touch-screen design. The touch screen runs on a Microsoft®
Windows® platform, the analyser offers full compatibility with network, PCs and LIMS, user access control, new flashpoint methods and unique features for standard and advanced users.
Miniflash flash point testers work according to ASTM D6450 and D7094, which give results equivalent to the Pensky Martens ASTM D93*) / EN ISO 2719 and Abel and Tag closed cup methods. The new Miniflash Touch analyser features improved methods for EN ISO 3679 and EN ISO 3680 and reinforces its position as standard flashpoint analyser for testing hazardous goods according to transport regulations. Miniflash Touch facilitates controlling of the parameters heat rate, ignition energy and amount of atmospheric oxygen present in the combustion chamber, through which advanced users can simulate virtually every flashpoint method within varying environmental conditions. The new model allows testing at an extended temperature range from 0-400°C and further adds to easy cleaning by introducing a new automatic ignition cleaning method.
Miniflash Touch´s large color touch-screen runs in a Microsoft® Windows® environment. This enables easy
networking and data transfer, allows seamless LIMS integration via Ethernet, LAN, RS232 and USB and full remote operation of the analyser. Further highlights of the flash point tester are USB printer support, intuitive menu navigation and a vast program and data storage. The unique flash point combustion graphics give users the opportunity to follow every millisecond of the flash combustion in unprecedented detail.
Reader Reply Card No 83
Grabner Instruments portable Miniflash testers are known for maximum safety, accuracy, speed and ease of use in testing flashpoints of liquids and solids. The extremely versatile analysers are worldwide standard testers for the petrochemical and flavors and fragrances industry and approved testers for Nato, Navy and military use. All Miniflash analysers house the safety standard: The Grabner Instruments flash detection method, measuring the instantaneous pressure increase of only 1-2 ml sample inside a continuously closed chamber at flashpoint temperature, eliminating the need of testing with an open flame. The fast thermoelectric cooling after the test saves expensive labor time and is optimised to guarantee best life time of temperature control. Miniflash models are available for single tests or with an 8-position autosampler for continuous flashpoint testing.
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Computer Controlled Generator for PPT Gas Standards
The FlexStream™/SD Automated Permeation System from Kin- Tek Laboratories (USA) dynamically blends parts-per-trillion (ppt) gas standards directly from pure analytes. The first dilution stage combines the flow of analyte vapour from a Trace Source™ permeation tube with a precisely controlled dilution gas flow to form a parts-per-billion (ppb) concentration primary mixture. In the second stage an aliquot of the primary mixture is further diluted to form the ppt mixture. Permeation tube parameters and concentration requirements are entered into the system through a front panel touch screen. The FlexStream™ computer controls dilution and aliquot flows to create the required mixture using the lowest total flow of dilution gas. Trace Source™ permeation tubes are available for over 500 compounds.
Common challenges including storage instability of ppt standards are circumvented. For most compounds, ppt and even ppb gas standards are not stable in storage. The FlexStream™ avoids this problem by dynamically blending flowing mixtures for immediate use. But for ppt mixtures typical direct blending requires very high dilution flow and analyte flow that is too low for accurate measurement even using permeation tubes. By incorporating two integrated, automated dilution stages the FlexStream™/SD easily blends single digit ppt mixtures using standard permeation tubes and total dilution flow of 10 l/min or less.
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Annual Buyers’ Guide 2011
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