Spotlight on the Gulf Coast Conference - Analytical Instrumentation SCION’s versatile instruments are meeting the most challenging requirements
The main purpose of using GC-MS in any analysis is to be able to positively identify compounds without standards and quantify low level of those compounds in a variety of matrices. Being able to equip analytical instruments with the most advanced technology is vital to allow limits of detection and quantification to be reached at part per billion (ppb) levels and for some applications, even lower. However, for most analytical laboratories cost and time constraints do not allow for extensively modified systems. SCION Instruments offers customised gas chromatography and mass spectrometry systems to meet the most challenging analytical requirements. Specifically, the high-level automation of the SCION GC-MS allows users to complete their solutions with minimal training. The Premium GC-MS system offers a versatile instrument that delivers the sensitivity and selectivity required without the need for expensive modification.
1,4-Dioxane is a synthetic industrial chemical stabiliser found in various paint strippers, greases and waxes. 1,4-Dioxane is a highly soluble ether that does not readily bind to soils so easily leaches into groundwater resulting in contamination of drinking water. Contamination of water supplies is vast across the United States of America with dioxane levels ranging from 2ppb to over 11,000ppb being detected at 67 different locations. Over 34 of these sites have been deemed a national priority for the release of the hazardous substance into the drinking water supply. Due to being resistant in nature, 1,4-dioxane does not undergo natural biodegradation processes.
The United States Environmental Protection Agency (US EPA) classified 1,4-dioxane as a likely carcinogenic to humans with common side effects including irritation to eyes, nose and throat with kidney and liver damage being noted after long term exposure. Federal screening levels and state health-based drinking water guidance values have been established, however, as of yet no federal law has been determined. The guideline range is from 0.25ppb to 77ppb, with the average contamination ranging between 3-6ppb.
The SCION Premium GC-MS (SQ) was coupled with a Tekmar Atomx Purge and Trap system to detect 1,4-dioxane at low levels. The MS was easily able to detect 0.3ppb levels of the water contaminant whilst still offering excellent signal to noise. A SIM method was implemented for the detection of m/z 88, the quantifier ion of 1,4-dioxane. Other non-SCION GC-MS systems require additional heating units and system modifications in order to reach the same low- level quantification whilst still not being able to match the signal to noise.
The sensitivity of the SCION GC-MS can be further maximised with method development including reducing the split mode or modifying the Tekmar Purge and Trap to include a heating unit for the samples.
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SCION Instruments simulated distillation systems for petrochemical industry
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Customised Chromatography Solutions Tailored to your Analytical needs
SCION 456-GC
The SCION Instruments analysers accurately determine the boiling point distribution of petroleum samples. This information from SCION Instruments analysers enables process operators and the engineers to optimise their refinery processes to achieve optimum performance.
Simulated Distillation (SimDist) is a gas chromatographyic technique that determines the boiling point distribution of petroleum oils, or similar hydrocarbon materials, by calculating the percentage distilled as a function of temperature. The most widely used information from this SimDist analysis would be a report detailing the boiling point of 1% increments in the percentage distilled. The initial boiling point and final boiling point of the sample are also determined.
In the recent research the SCION GC-456 was used to perform simulated distillation by ASTM method D2887.
Compared to physical distillation, simulated distillation often yields results in less than 20 minutes and is easily automated. ASTM D2887 is a simulated distillation method that is applied to most refinery streams with fractions between C5 – C44 with a boiling point of at least 55°C. The SCION 456GC equipped with a flame ionization detector (FID) and offers an optimised solution for all simulated distillation requirements. The graph above shows typical chromatogram for the separation achieved during simulated distillation.
SCION Instruments develops, manufactures and markets systems ranging from simple stand-alone GC through to fully configured analysers which are tailored for specific customers’ complex applications and analysis. SCION supports GC, GC-MS (gas chromatography mass spectrometry) and Compass CDS (chromatography data system) product lines. The company prides itself for manufacturing facilities in Goes, Netherlands and headquarters in Livingston, UK. SCION Instruments maintains global infrastructure and supports sales around the world.
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WWW.PETRO-ONLINE.COM
Simulated Distillation (SIMDIST) Detailed Hydrocarbon Analysis (DHA) Refinery Gases (RGA) Oxygenates
Natural Gas Analysers (NGA) Transformer Oil Gas Analysis (TOGA) Benzene & Toluene in Gasoline Trace Impurities in Gases Biodiesel Sulfur in Gas Permanent & Greenhouse Gases
SCION GC
SCION SQ
COLUMNS
SCION Instruments (UK) Ltd. 1 Bain Square, Livingston
West Lothian, EH54 7DQ United Kingdom (0044) 1506 300 200
www.scioninstruments.com
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