Sensors for Highly Toxic Gases: Methylamine and Hydrogen Chloride Detection at Low Concentrations in an Ionic Liquid on Pt Screen Printed Electrodes
Commercially available Pt screen printed electrodes (SPEs) have been employed as possible electrode materials for methylamine (MA) and hydrogen chloride (HCl) gas detection. The room temperature ionic liquid (RTIL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2mim][NTf2]) was us...
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-10-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/15/10/26866 |
| _version_ | 1818007541295087616 |
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| author | Krishnan Murugappan Debbie S. Silvester |
| author_facet | Krishnan Murugappan Debbie S. Silvester |
| author_sort | Krishnan Murugappan |
| collection | DOAJ |
| description | Commercially available Pt screen printed electrodes (SPEs) have been employed as possible electrode materials for methylamine (MA) and hydrogen chloride (HCl) gas detection. The room temperature ionic liquid (RTIL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2mim][NTf2]) was used as a solvent and the electrochemical behaviour of both gases was first examined using cyclic voltammetry. The reaction mechanism appears to be the same on Pt SPEs as on Pt microelectrodes. Furthermore, the analytical utility was studied to understand the behaviour of these highly toxic gases at low concentrations on SPEs, with calibration graphs obtained from 10 to 80 ppm. Three different electrochemical techniques were employed: linear sweep voltammetry (LSV), differential pulse voltammetry (DPV) and square wave voltammetry (SWV), with no significant differences in the limits of detection (LODs) between the techniques (LODs were between 1.4 to 3.6 ppm for all three techniques for both gases). The LODs achieved on Pt SPEs were lower than the current Occupational Safety and Health Administration Permissible Exposure Limit (OSHA PEL) limits of the two gases (5 ppm for HCl and 10 ppm for MA), suggesting that Pt SPEs can successfully be combined with RTILs to be used as cheap alternatives for amperometric gas sensing in applications where these toxic gases may be released. |
| first_indexed | 2024-04-14T05:16:59Z |
| format | Article |
| id | doaj.art-e172433cfecf49a5803a57075b008b56 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-14T05:16:59Z |
| publishDate | 2015-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-e172433cfecf49a5803a57075b008b562022-12-22T02:10:20ZengMDPI AGSensors1424-82202015-10-011510268662687610.3390/s151026866s151026866Sensors for Highly Toxic Gases: Methylamine and Hydrogen Chloride Detection at Low Concentrations in an Ionic Liquid on Pt Screen Printed ElectrodesKrishnan Murugappan0Debbie S. Silvester1Nanochemistry Research Institute, Department of Chemistry, Curtin University, GPO Box U1987, Perth 6845, WA, AustraliaNanochemistry Research Institute, Department of Chemistry, Curtin University, GPO Box U1987, Perth 6845, WA, AustraliaCommercially available Pt screen printed electrodes (SPEs) have been employed as possible electrode materials for methylamine (MA) and hydrogen chloride (HCl) gas detection. The room temperature ionic liquid (RTIL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2mim][NTf2]) was used as a solvent and the electrochemical behaviour of both gases was first examined using cyclic voltammetry. The reaction mechanism appears to be the same on Pt SPEs as on Pt microelectrodes. Furthermore, the analytical utility was studied to understand the behaviour of these highly toxic gases at low concentrations on SPEs, with calibration graphs obtained from 10 to 80 ppm. Three different electrochemical techniques were employed: linear sweep voltammetry (LSV), differential pulse voltammetry (DPV) and square wave voltammetry (SWV), with no significant differences in the limits of detection (LODs) between the techniques (LODs were between 1.4 to 3.6 ppm for all three techniques for both gases). The LODs achieved on Pt SPEs were lower than the current Occupational Safety and Health Administration Permissible Exposure Limit (OSHA PEL) limits of the two gases (5 ppm for HCl and 10 ppm for MA), suggesting that Pt SPEs can successfully be combined with RTILs to be used as cheap alternatives for amperometric gas sensing in applications where these toxic gases may be released.http://www.mdpi.com/1424-8220/15/10/26866room temperature ionic liquidsscreen printed electrodescyclic voltammetrydifferential pulse voltammetrysquare wave voltammetrydetection limitgas sensing |
| spellingShingle | Krishnan Murugappan Debbie S. Silvester Sensors for Highly Toxic Gases: Methylamine and Hydrogen Chloride Detection at Low Concentrations in an Ionic Liquid on Pt Screen Printed Electrodes Sensors room temperature ionic liquids screen printed electrodes cyclic voltammetry differential pulse voltammetry square wave voltammetry detection limit gas sensing |
| title | Sensors for Highly Toxic Gases: Methylamine and Hydrogen Chloride Detection at Low Concentrations in an Ionic Liquid on Pt Screen Printed Electrodes |
| title_full | Sensors for Highly Toxic Gases: Methylamine and Hydrogen Chloride Detection at Low Concentrations in an Ionic Liquid on Pt Screen Printed Electrodes |
| title_fullStr | Sensors for Highly Toxic Gases: Methylamine and Hydrogen Chloride Detection at Low Concentrations in an Ionic Liquid on Pt Screen Printed Electrodes |
| title_full_unstemmed | Sensors for Highly Toxic Gases: Methylamine and Hydrogen Chloride Detection at Low Concentrations in an Ionic Liquid on Pt Screen Printed Electrodes |
| title_short | Sensors for Highly Toxic Gases: Methylamine and Hydrogen Chloride Detection at Low Concentrations in an Ionic Liquid on Pt Screen Printed Electrodes |
| title_sort | sensors for highly toxic gases methylamine and hydrogen chloride detection at low concentrations in an ionic liquid on pt screen printed electrodes |
| topic | room temperature ionic liquids screen printed electrodes cyclic voltammetry differential pulse voltammetry square wave voltammetry detection limit gas sensing |
| url | http://www.mdpi.com/1424-8220/15/10/26866 |
| work_keys_str_mv | AT krishnanmurugappan sensorsforhighlytoxicgasesmethylamineandhydrogenchloridedetectionatlowconcentrationsinanionicliquidonptscreenprintedelectrodes AT debbiessilvester sensorsforhighlytoxicgasesmethylamineandhydrogenchloridedetectionatlowconcentrationsinanionicliquidonptscreenprintedelectrodes |