Determination of fuel ethers in water by membrane extraction ion mobility spectrometry

Holopainen, Sanna; Nousiainen, Marjaana; Sillanpää, Mika

doi:10.1016/j.talanta.2013.01.026

Cited by 8 publications

(3 citation statements)

References 34 publications

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“…This can be seen in a group of published K 0 values based on calibration by 2,6-di- tert -butylpyridine (D t BP), proposed as a reference standard by Eiceman et al No numerical K 0 value was reported for D t BP in that study, but Viitanen et al estimated a K 0 value of 1.42 cm 2 V –1 s –1 based on a figure . That value was used as K 0std in eq , and new K 0 values have since been calculated by multiple researchers using this inaccurate calibration. ,− Similar studies that also report K 0 values based on an inaccurate calibration further perpetuate the phenomenon. Consequently, a wide range of K 0 values will be produced for the same COI by different researchers when calibrating against dissimilar experimental conditions with unaccounted error.…”

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confidence: 99%

High Accuracy Ion Mobility Spectrometry for Instrument Calibration

et al. 2018

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Ion mobility spectrometry (IMS) is widely used to characterize compounds of interest (COIs) based on their reduced mobility ( K) values. In an attempt to increase the accuracy and agreement of studies, the most recommended method has been to use a reference compound with a known K value to calibrate the instrument and calculate COI K values from normalized spectra. Researchers are limited by the accuracy of previous K value reference measurements on which to base their calibrations. Any inaccuracy in these reference K values, typically ±2%, will propagate through to the calculated K value of the COI. For this reason, there is a need to standardize reference K values with improved accuracy. Through improvement of the accuracy of reference measurements, a lower degree of error will propagate through new K value calculations. The K values of the ammonium reactant ion, the potential reference standard dimethyl methylphosphonate (DMMP), and three explosive COIs were characterized at multiple drift gas temperatures, drift gas water contents, and electric field strengths on an accurate ion mobility spectrometry instrument. K values reported here are known to ±0.1% as a result of reducing the error of all instrumental parameters.

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confidence: 99%

High Accuracy Ion Mobility Spectrometry for Instrument Calibration

et al. 2018

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“…Due to the difficult transport of water through polymer membranes, especially those covered with polysiloxane, they found an application in the constructed systems, allowing for direct collection of an analyte from an aqueous sample and its introduction into a detector [ 16 , 17 , 18 ]. In these methods, tests are carried out in flow systems.…”

Section: Introductionmentioning

confidence: 99%

Capillary Sensor for Detection of Amphetamine Precursors in Sewage Water

et al. 2021

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This paper deals with the problem of detecting benzyl methyl ketone (BMK), which is a precursor of amphetamine that can be synthesized in home labs. The focus of our work was to identify an improvement for the analysis of sewage introduced into the municipal sewage system. The sensors used to detect BKM in these systems are often clogged and therefore cannot function properly. In this article, a new method of detecting BMK and other chemicals in wastewater is presented. A system containing capillary polypropylene, hydrophobized with polysiloxane coating fibers was prepared. These solutions were used for continuous online measurements by ion mobility spectrometry. The use of pipes with a polysiloxane coating reduces the permeation of water and significantly increases the BMK permeation due to its high solubility in the polymer.

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“…Polymer membranes are used in sample introduction systems for IMS detectors. In published works [ 32 , 33 , 34 , 35 , 36 , 37 , 38 ] it has been shown that inlet systems with a polymer membrane provide effective detection of analytes present in the gas and liquid phases. The purpose of our work is not to examine the effectiveness of detection, but to determine the parameters characteristic for diffusion process.…”

Section: Introductionmentioning

confidence: 99%

Application of Ion Mobility Spectrometry for Permeability Studies of Organic Substances through Polymeric Materials

2020

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Drift tube ion mobility spectrometers (DT IMS) allow the concentration of different organic compounds to be measured. This gives the opportunity to use these detectors in measuring the penetration of various substances through polymer membranes. Permeation measurements of two substances (2-heptanone and dimethyl methylphosphonate (DMMP)) through a cylindrical silicone rubber membrane were carried out. The membrane separated the aqueous solution from the air. The analyte was introduced into water, and then its concentration in air on the opposite side of the membrane was recorded. Based on the dynamics of detector signal changes, the diffusion coefficients for both tested substances were determined. Determination of permeability coefficients was based on precise quantitative measurements, which took into account the non-linearity of the detector characteristics and the effect of water on detection sensitivity. The analysis of measurement results was based on a mathematical description of diffusion process.

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Determination of fuel ethers in water by membrane extraction ion mobility spectrometry

Cited by 8 publications

References 34 publications

High Accuracy Ion Mobility Spectrometry for Instrument Calibration

High Accuracy Ion Mobility Spectrometry for Instrument Calibration

Capillary Sensor for Detection of Amphetamine Precursors in Sewage Water

Application of Ion Mobility Spectrometry for Permeability Studies of Organic Substances through Polymeric Materials

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