Calibration of membrane inlet mass spectrometric measurements of dissolved gases: Differences in the responses of polymer and nano-composite membranes to variations in ionic strength

Miranda, L.D.; Byrne, Robert H.; Short, R.T.; Bell, Ryan J.

doi:10.1016/j.talanta.2013.05.014

Cited by 5 publications

(4 citation statements)

References 42 publications

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“…However, the maximum salt concentration tested here does not ensure the absence of interference in the particular case of seawater swimming pools, where salt concentration can reach 20 g.L −1 . At higher NaCl concentrations (5,8–58 g.L −1 ), Miranda et al reported ionic strength dependence of MIMS signals for the quantification of four gases. Further experiments at high ionic strength would be necessary to determine if measurements could be performed by MIMS in seawater swimming pools.…”

Section: Resultsmentioning

confidence: 99%

Analysis of chlorination by‐products in swimming pool water by membrane introduction mass spectrometry – Influence of water physicochemical parameters

Tsamba

Correc

Cloirec

et al. 2019

Rapid Comm Mass Spectrometry

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Rationale Chlorine reacts in swimming pools with several compounds released by bathers to form disinfection by‐products (DBPs). Epidemiological studies have shown adverse effects on health associated with the exposure to DBPs present in indoor swimming pool atmosphere. DBPs analyses require the use of multiple techniques depending on the targeted molecules. The measurement process itself is challenging due to the low stability of several compounds and the lack of specificity of certain methods. The Membrane Introduction Mass Spectrometry (MIMS) technique provides a solution to these problems by specific and sensitive in situ measurement of DBPs. This study investigates the effect of analytical conditions on quantification of DBPs and assesses the relevance of using MIMS for reliable analysis under typical swimming pool operating conditions. Methods MIMS is based on the simultaneous permeation of the selected compounds from the air or water samples through a polydimethylsiloxane (PDMS) membrane. DBPs are identified and quantified with a quadrupole analyzer after electron ionization. Limits of quantification (LOQs) of five DBPs are determined to assess the sensitivity of the system. Moreover, signal changes are monitored while varying physicochemical parameters such as temperature, pH and ionic strength. Results The mass spectra obtained for individual molecules show that the simultaneous measurement of trihalomethanes (THMs) and chloramines requires the monitoring of several ions and mathematical corrections of the signal. The pH and ionic strength of the solution do not significantly influence the determination of THMs. On the contrary, the temperature and hydraulics at the membrane interface must be controlled for accurate determination of DBPs. Conclusions Results confirm that MIMS is a promising technology for the simultaneous quantification of volatile DBPs in both water and air of swimming pools. However, operating conditions such as membrane temperature should be treated with great care in order to avoid interferences.

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Section: Resultsmentioning

confidence: 99%

Analysis of chlorination by‐products in swimming pool water by membrane introduction mass spectrometry – Influence of water physicochemical parameters

Tsamba

Correc

Cloirec

et al. 2019

Rapid Comm Mass Spectrometry

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“…MIMS is a versatile tool for simultaneous measurements of volatile compounds and requires only a small water sample for analysis. MIMS has been used increasingly to measure dissolved gases over the past several years − and quantify the generated N isotopes and isotope ratios of 28 N 2 , 29 N 2 , and 30 N 2 in experiments enriched with 15 N compounds (e.g., 15 NH 4 + , 15 NO 3 – , or 15 N-labled organic compounds − ). The high accuracy and precision, rapid sample throughput, affordability, and cost-effectiveness of MIMS make this approach attractive for current and future investigations of N dynamics in regions affected by N pollution. ,, …”

Section: Introductionmentioning

confidence: 99%

A Novel Membrane Inlet Mass Spectrometer Method to Measure¹⁵NH₄⁺for Isotope-Enrichment Experiments in Aquatic Ecosystems

Yin¹,

Hou²,

Liu³

et al. 2014

Environ. Sci. Technol.

172

114

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Nitrogen (N) pollution in aquatic ecosystems has attracted much attention over the past decades, but the dynamics of this bioreactive element are difficult to measure in aquatic oxygen-transition environments. Nitrogen-transformation experiments often require measurement of (15)N-ammonium ((15)NH4(+)) ratios in small-volume (15)N-enriched samples. Published methods to determine N isotope ratios of dissolved ammonium require large samples and/or costly equipment and effort. We present a novel ("OX/MIMS") method to determine N isotope ratios for (15)NH4(+) in experimental waters previously enriched with (15)N compounds. Dissolved reduced (15)N (dominated by (15)NH4(+)) is oxidized with hypobromite iodine to nitrogen gas ((29)N2 and/or (30)N2) and analyzed by membrane inlet mass spectrometry (MIMS) to quantify (15)NH4(+) concentrations. The N isotope ratios, obtained by comparing the (15)NH4(+) to total ammonium (via autoanalyzer) concentrations, are compared to the ratios of prepared standards. The OX/MIMS method requires only small sample volumes of water (ca. 12 mL) or sediment slurries and is rapid, convenient, accurate, and precise (R(2) = 0.9994, p < 0.0001) over a range of salinities and (15)N/(14)N ratios. It can provide data needed to quantify rates of ammonium regeneration, potential ammonium uptake, and dissimilatory nitrate reduction to ammonium (DNRA). Isotope ratio results agreed closely (R = 0.998, P = 0.001) with those determined independently by isotope ratio mass spectrometry for DNRA measurements or by ammonium isotope retention time shift liquid chromatography for water-column N-cycling experiments. Application of OX/MIMS should simplify experimental approaches and improve understanding of N-cycling rates and fate in a variety of freshwater and marine environments.

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“…In 2007, Bell et al developed and proved the utility of MIMS for analysis in seawater [17]. In addition, research has been performed regarding the permeability of membranes in varying salinity, which will lead to determination of an appropriate membrane for a range of ionic concentrations [18]. Petroleum products have been measured to ppm levels in aqueous environments via MIMS [19].…”

Section: Introductionmentioning

confidence: 99%

“…Membrane materials have been characterized for water and atmospheric analysis [18,24]. Materials beyond PDMS, such as those with nanocrystallines, are of further interest.…”

Section: Introductionmentioning

confidence: 99%

Development of Multi-Membrane Near-Infrared Diode Mass Spectrometer for Field Analysis of Aromatic Hydrocarbons

Mach

Wright

Verbeck

2014

J. Am. Soc. Mass Spectrom.

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Abstract. Membrane Inlet Mass Spectrometry (MIMS) is a technique that incorporates a semi-permeable membrane selective for differing organic molecules and chemistries. This eliminates the need for time-consuming sample preparation and facilitates near instantaneous analysis. This study will examine how the front end of MIMS incorporates three dual inlet ports, allowing for differing MIMS materials and selectivity for specific environments. Polydimethylsiloxane (PDMS) membranes have proven to be selective of benzene, toluene, and xylene (BTX) as well as aromatic hydrocarbons that are common in petroleum products while remaining selective against the aliphatic chains. PDMS has proven to be a successful choice of membrane with high permeability in atmospheric environments. In addition, polycyclic aromatic hydrocarbons (PAHs) such as acenaphthene, acenapthylene, naphthalene, and fluorene have recently been detected to the 5 ppb level in a nitrogen atmosphere with our current configuration. This preliminary work provides proof of concept using near-infrared laser diodes that act upon the membrane to increase its permeability and provide higher sensitivity of aromatic samples.

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Calibration of membrane inlet mass spectrometric measurements of dissolved gases: Differences in the responses of polymer and nano-composite membranes to variations in ionic strength

Cited by 5 publications

References 42 publications

Analysis of chlorination by‐products in swimming pool water by membrane introduction mass spectrometry – Influence of water physicochemical parameters

Analysis of chlorination by‐products in swimming pool water by membrane introduction mass spectrometry – Influence of water physicochemical parameters

A Novel Membrane Inlet Mass Spectrometer Method to Measure¹⁵NH₄⁺for Isotope-Enrichment Experiments in Aquatic Ecosystems

Development of Multi-Membrane Near-Infrared Diode Mass Spectrometer for Field Analysis of Aromatic Hydrocarbons

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Calibration of membrane inlet mass spectrometric measurements of dissolved gases: Differences in the responses of polymer and nano-composite membranes to variations in ionic strength

Cited by 5 publications

References 42 publications

Analysis of chlorination by‐products in swimming pool water by membrane introduction mass spectrometry – Influence of water physicochemical parameters

Analysis of chlorination by‐products in swimming pool water by membrane introduction mass spectrometry – Influence of water physicochemical parameters

A Novel Membrane Inlet Mass Spectrometer Method to Measure15NH4+for Isotope-Enrichment Experiments in Aquatic Ecosystems

Development of Multi-Membrane Near-Infrared Diode Mass Spectrometer for Field Analysis of Aromatic Hydrocarbons

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A Novel Membrane Inlet Mass Spectrometer Method to Measure¹⁵NH₄⁺for Isotope-Enrichment Experiments in Aquatic Ecosystems