18 Analytical Instrumentation Pioneering a New Age of Precision in Vapour Pressure Testing


Ametek Grabner Instruments (Austria) has extended its vapour pressure tester product portfolio with the launch of a new automatic tester for low-volatility measurements. Grabner developed the MINIVAP VPXpert-L to automate the manual ASTM D2879 Standard Test Method for Vapour Pressure by Isoteniscope used by the chemical industry. The MINIVAP VPXpert-L analyser measures gasoline, jet fuels, solvents and chemicals as well as food, flavour and fragrance products with vastly improved precision. The analyser is optimised for a pressure range from 0.1 to 100 kPa and shows a measuring repeatability better than 0.1 kPa.


Government regulations mandate the measurement of the vapour pressure of virtually any liquid manufactured, stored or shipped to ensure transportation safety and to protect the environment. The MINIVAP VPXpert-L is the first completely automatic analyser that accurately tests fuels and chemicals down to 0.1 kPa vapour pressure in a temperature range from 0 to 120°C. The pressure range of this new tester is limited to 100 kPa, which results in an optimised measuring repeatability of less than 0.1 kPa. The instrument requires only 1 mL of sample per test, eliminates the need for vacuum pump and manual filling, and yields results within minutes.


“Ametek Grabner Instruments is the recognised leader in vapour pressure testing. With its introduction of the MINIVAP VPXpert-L, Grabner paves the way for a new era in vapour pressure testing,” explains Oliver Sauer, Head of Marketing & Sales at Ametek Grabner Instruments. “In terms of precision, the new instrument is about five times more precise when compared with other testers.”


“With this analyser, we are able to meet two key market requirements. First, we fulfill the demand of the petroleum industry for higher precision in routine gasoline and jet fuel testing. And, we offer a solution for the chemical, flavours and food industries, which have a specific need for low-volatility testing.”


The MINIVAP VPXpert-L includes all standard vapour pressure methods for testing fuels and incorporates new static methods for testing chemical compounds. These new 'VOC'-methods measure the absolute vapour pressure based on the static Triple Expansion Method and yield results equivalent to the static ASTM D2879 Isoteniscope method.


While experienced personnel are needed to operate an Isoteniscope, the VPXpert-L is easy to use. When the sample is connected to the instrument, a fully automatic measurement can be started immediately. To prevent composition changes of chemicals during the test, a sample evacuation is not required. Instead, dissolved and entrained air is automatically removed from the measurement result. Cross contamination between low volatile samples is minimised through a clever combination of high-quality Sampling Pro valves and automatic rinsing. To ensure proper sample outgassing and to reduce equilibrium time, a sample shaker is installed in every unit.


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The JFTOT, Jet Fuel Thermal Oxidation Tester, of PAC/Alcor is a brilliant device for tracking the amount of contaminations in jet fuel. But this device can only work properly if its test performance is validated frequently. E.L.S., European Lab Services (Belgium), provides a trustworthy verification and verification program according to ISO 17025 accreditation.


E.L.S. makes sure every step of the ASTM D3241 has been checked thoroughly before their job is done. This ASTM method, specifically for the JFTOT device, describes internal calibration of the temperature sensor on 3 points with standards, verification of pump speed, verification and control of the differential pressure, volume verification, programming of the offsets, testing of a reference product, etc.


Every step of the process will be checked and the apparatus will be ready to use with the proper certification. With 25 years of experience and the unique ISO 17025 accreditation, E.L.S. is the only company in the world that provides the correct testing procedure for the JFTOT device.


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LECTIVE & SENSITIVE DETEC ION OF SULFUR


DETECTION OF SULFUR IN PETROCHEMICALS


OI Analytical 5380 – Pulsed Flame Photometric Detector


• Linear, equimolar response to known and unknown sulfur compounds.


• Detects and measures sulfur from low ppb to ppm levels and calculates total sulfur.


• Compliant with ASTM Methods for gas-phase and liquid-phase petrochemicals.


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Next Generation of Multi- Dimensional Gas Chromatography


PAC (USA), specialist providers of advanced analytical instruments for laboratories and online process applications, recently released the AC Analytical Controls Reformulyzer M4 (M4), which provides fast group type analysis of gasoline and gasoline blend streams using multi-dimensional gas chromatography.


“We are proud to announce the release of our next generation product, Reformulyzer M4, the fastest and most versatile analyser on the market, combining the analyses of Paraffins, Olefins, Naphthenes, Oxygenates, and Aromatics all in one instrument,” said David Tran, PAC Vice-President of Product Management and Marketing. “The M4 significantly reduces the total cost of ownership and increases the instrument uptime through the improved trap performance. Its quick and accurate analysis enables refineries to make timely decisions to keep their products on spec and optimise their operations. This same advantage allows independent labs to improve their capacity by almost doubling the number of samples they can process.”


Other group type analysis instruments can take 75 minutes to run. The M4 reduces this by approximately 50% to 39 minutes. In addition, because of improved durability, the M4 traps do not need to be replaced as often, which significantly decreases maintenance costs. This improvement, combined with the improved sample capacity, can reduce the total operational cost per sample by 50% when utilising the M4 around 90%.


www.oico.com / 979.690.1711 email: 292ad@reply-direct.com OCTOBER / NOVEMBER 2013 • WWW.PETRO-ONLINE.COM


Compliance with international standards is an absolute imperative in the hydrocarbon industry. Refineries and independent labs must follow strict procedures and methods to certify end products. The M4 is the worldwide accepted industry standard for EN ISO 22854, and also fully complies with ASTM D6839, ASTM D5443, IP 566, and SH/T 0741.”


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