Instrumental Setup for Simultaneous Total and Speciation Analysis of Volatile Arsenic Compounds in Gas and Liquefied Gas Samples

Abstract

Although analysis of metals and metalloids, such as arsenic, is widely spread in many different fields, their analysis in gas and liquefied gas samples is still a challenge. A new GC-ICP-MS set up has been developed for their simultaneous total and speciation analysis in gas and liquefied gas samples without the need of a preconcentration step. An arsine in nitrogen standard was used for optimization and evaluation of the system. Good linearity and detection limits in the very low ppt level for both total and speciation analyses were found. Liquefied butane pressurized under nitrogen and doped with arsine and a propylene real sample from a cracker plant were analyzed using both external calibration and standard additions methods. The good match between both quantifying approaches demonstrated almost negligible matrix effects, even for the total analysis. Application of the approach to check repartition of volatile elements or species between gas and liquid phases was performed in the real propylene sample. Finally, its potential applicability for the simultaneous total and speciation analysis of other elements, such as Hg, was also proved.

GC-ICP-MS/MS Instrumental Setup for Total and Speciation Sulfur Analysis in Gasolines using Generic Standards

“…Total or speciation sulfur quantifications can be performed without any pre-treatment of the sample using one single instrumental set-up just by connecting the GC inlet either to a transfer line (total analysis) or to a column (speciation analysis). It is worth mentioning that the use of a GC equipped with two inlets, one connected to a transfer line and the other to the column, and both to the GC-ICP-MS transfer line by means of a two-hole ferrule, as previously described elsewhere for gas sample analysis, 22 would simplify further the approach. Such integrated set-up could be useful for high-throughput total sulfur quantification (screening).…”

Arsenic release to the environment from hydrocarbon production, storage, transportation, use and waste management

“…Most papers on methods focus on analyzing As in specific hydrocarbon sources, such as crude oil (Puri and Irgolic, 1989;Hardaway et al, 2004;Sánchez et al, 2013), oil sands (Bicalho et al, 2017), gasoline, diesel and naphtha (Brandão et al, 2006), and natural gas (Irgolic et al, 1991;Delgado-Morales et al, 1994b;Krupp et al, 2007;Xu et al, 2015;Cachia et al, 2017;Freije-Carrelo et al, 2017). As there are dozens of papers on analysis of As species in different hydrocarbon products, the reader is directed to these papers in addition to reviews (e. g., Nadkarni, 1991;Cassella et al, 2002;Sánchez et al, 2013) for more information.…”

Development of a Fluorophore with Enhanced Unorthodox Chalcogen Bonding for Highly Sensitive Detection of Trimethyl Arsine Vapor

“…Arsenic widely exists in soil, water, air, and living organisms because of natural and anthropogenic activities. − Many arsenic compounds, whether inorganic or organic arsenic species, are highly toxic and severely affect the health of human beings via various ways. − Therefore, rapid and sensitive detection of them, particularly in the air, has attracted considerable attention. − ,, Among arsenic sources in the air, organic arsines (e.g., trimethyl arsine) represent one important class that can be released from soil upon microbial metabolism . Sensitive detection of organic arsines is not only beneficial to health and environmental monitoring but also helpful to locate arsenic distribution in soil or even arsenic mines.…”

“…Sensitive detection of organic arsines is not only beneficial to health and environmental monitoring but also helpful to locate arsenic distribution in soil or even arsenic mines. However, existing detection technologies for arsenic species mainly rely on bulky instruments such as inductively coupled plasma-optical emission spectroscopy (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), ,,, and electro thermal-atomic absorption spectroscopy (ET-AAS) . These detection methods generally suffer from one or more limitations including operation complexity, nonportability, and high cost.…”

“…5−15 Therefore, rapid and sensitive detection of them, particularly in the air, has attracted considerable attention. [7][8][9][10]14,15 Among arsenic sources in the air, organic arsines (e.g., trimethyl arsine) represent one important class that can be released from soil upon microbial metabolism. 1 Sensitive detection of organic arsines is not only beneficial to health and environmental monitoring but also helpful to locate arsenic distribution in soil or even arsenic mines.…”