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Direct measurement of elemental mercury using multidimensional gas chromatography with microwave-induced helium plasma atomic emission spectroscopy

Citation

Gras, R and Luong, J and Shellie, RA, Direct measurement of elemental mercury using multidimensional gas chromatography with microwave-induced helium plasma atomic emission spectroscopy, ACS Earth and Space Chemistry, 2, (5) pp. 471-478. ISSN 2472-3452 (2018) [Refereed Article]

Copyright Statement

2018 American Chemical Society.

DOI: doi:10.1021/acsearthspacechem.8b00008

Abstract

Microwave-induced helium plasma atomic emission spectroscopy permits direct measurement of picogram levels of elemental mercury in various matrices when combined with multidimensional gas chromatography. Two columns with different stationary phases provide excellent separation for elemental mercury, and multidimensional analysis improves the reliability, performance, and system cleanliness of atomic emission detection. The possibility of false positive identification is substantially eliminated, and excellent sensitivity for the target compound was attained with the use of two selective columns and atomic emission detection at 254 nm. A flame ionization detector was incorporated as part of the system configuration to increase analytical platform capability and flexibility. Elemental mercury was measured in gas matrices over a range of 0.1-170 ug/m3 having a correlation coefficient of R2 = 0.9995, a precision of less than 5% relative standard deviation (n = 10), and a measured recovery exceeding 99% in natural gas as a model matrix. The total analysis time is less than 10 min. Only a small 1 mL sample volume is needed, and the described approach does not rely on any form of sample enrichment. The utility of multidimensional gas chromatography with microwave-induced helium plasma atomic emission spectroscopy is demonstrated with challenging industrial applications, such as the measurement of elemental mercury in natural gas, industrial solvents, and vapor generated from ruptured compact fluorescent light bulbs.

Item Details

Item Type:Refereed Article
Keywords:elemental mercury, multidimensional gas chromatography, natural gas, solvents, CFL bulbs, organometallics, flame ionization detector
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Analytical chemistry not elsewhere classified
Objective Division:Manufacturing
Objective Group:Industrial chemicals and related products
Objective Field:Industrial chemicals and related products not elsewhere classified
UTAS Author:Gras, R (Ms Ronda Gras)
UTAS Author:Luong, J (Mr Jim Luong)
UTAS Author:Shellie, RA (Professor Robert Shellie)
ID Code:152338
Year Published:2018
Web of Science® Times Cited:7
Deposited By:Engineering
Deposited On:2022-08-17
Last Modified:2022-09-15
Downloads:0

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