Analysis of volatile petroleum/petrochemical products using ICP-AES with ultrasonic nebulization and membrane desolvation
- Exxon Research and Engineering Company, Baytown, TX (United States); and others
At FACSS XX the authors reported a new method for trace analysis of volatile hydrocarbons and solvents using an ultrasonic nebulizer (USN) coupled to a microporous membrane desolvator (MMD) for near complete removal of the organic matrix from the sample aerosol prior to introduction into the ICP. Matrix removal permits the analysis of a wide variety of organic material using a single set of calibration reference solutions, a concept referred to as {open_quote}universal calibration{close_quotes}. For this study the MMD was lengthened, improving its efficiency, and permitting the direct introduction of pentanes, and motor gasolines into the ICP. The concept of universal calibration was tested by analyzing a set of refinery chemical plant petroleum naphtha samples and finished gasolines using the USN/MMD. It was found that here highly volatile samples could be analyzed accurately with a single calibration, using an internal standard element to correct for differences in the nebulization efficiencies. Detection limits for direct determination of elements in pentane are comparable to those for aqueous determinations using the USN. It is expected that the USN/MMD will find broad applications in laboratory of analysis of critical elements, such as catalyst poisons in liquid distillate feedstocks, gasoline blendstocks, finished gasolines and high purity solvents.
- OSTI ID:
- 191756
- Report Number(s):
- CONF-941098--
- Country of Publication:
- United States
- Language:
- English
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