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Analytical Instrumentation Selective Analysis of Trace Level Carbonyl Sulphide in Propylene by Gas
Chromatography and Chemiluminescence as Alternative Detection for ASTM D5303 In processes producing propylene, trace level carbonyl sulphide (COS) acts as a poison to commercial polymerisation catalysts, resulting in deactivation and costly process downtime. Standard methods like ASTM method D5303 addresses this analysis but is limited to the analysis of COS within the range of 0.5 to 4.0 ppm mass.
The determination of COS in propylene is the most challenging because COS is not separated from the propylene matrix. On many detectors, the COS response is heavily affected by the propylene matrix which results in erroneous results; particularly when going to the often-desired low levels of as low as 30 ppb Mol.
PAC’s SeNse Chemiluminescence Detector is the most advanced GC Detector available for the selective determination of sulphur containing compounds in hydrocarbon matrices. The PAC COS in Propylene analyser not only overcomes the analytical challenge of COS/Propylene coelution by unmatched selectivity, but also addresses the desired detection levels. Its performance exceeds ASTM D5303 requirements, providing accurate and repeatable data down to 30 ppb Mol.
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Myron L®
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Triple Certifi cation of CRMs
Company’s new 900 Series industrial monitor/
controller combines fl exibility, accuracy and reliability. It is the ideal instrument for even the most demanding water treatment applications.
Measurement capabilities include: Conductivity, Resistivity, Salinity, TDS, pH, ORP, Temperature, mVDC, Flow and % Rejection. It includes a 4-20 mA input. Standard outputs are a 0-10 VDC recorder output and a Relay output. Available optional outputs include a 4-20 mA, an RS-485 output, as well as 2 additional Relays.
The instrument’s display can show up to 4 measurements simultaneously. Sensor setup allows the user to eliminate error due to cable length and enter custom cell constants for conductivity sensors. Calibration is electronic. It’s 3.5” touchscreen and intuitive GUI make it simple to set up, simple to use and simple to adapt to your specifi c needs.
The Myron L® Company 900: A high level performer for applications where high level performance is an absolute requirement.
It is imperative that accurate and precise CRMs are used as the basis for calibration of analytical instruments in hydrocarbon and energy laboratories. DCG Partnership takes pride in every step of the CRM manufacturing process and is accredited to both ISO 17025 for the analysis and certifi cation of hydrocarbons and chemicals and ISO Guide 34 for the manufacture of hydrocarbon and chemical CRMs.
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Every procedure, from the initial selection of the raw product, to the meticulous blending of the gases or liquids, to the complete fi nal analysis and certifi cation of the completed product is carefully monitored to assure quality. This year, 2017, beyond the accreditation for the key 23 analytical methods, development is made to meet the ISO 17043 requirements for Profi ciency Testing Conformity Assessment. This will offer DCG Partnership a unique “Triple certifi cation of CRMs” position in the market.
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Transform Your Gasoline Analysis with GC-MS
LECO’s Pegasus BT provides users with solutions for a wide range of applications, including gasoline and petroleum analyses falling under ASTM D5769 method requirements. Three fundamental criteria must be met in order to satisfy the requirements for ASTM D5769: sensitivity of 0.01 mass % for 1,4-diethylbenzene, achieving specifi ed ion abundance ratios for key masses of 1,2,3-trimethylbenzene, and calibration linearity for all analytes. The Pegasus®
BT easily
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satisfi es these method requirements and it allows for separation of chromatographically overlapped analytes using established algorithms. It also provides a solution for D5769 analysis of aromatic compounds without early saturation of the ion source, and the source stays clean improving effi ciency of your lab. Consistent performance of the Pegasus BT with easy, automated data processing provides a clear solution for complete aromatics analysis of fi nished gasoline.
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ANNUAL BUYERS GUIDE 2018 •
WWW.PETRO-ONLINE.COM
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