pH-based colorimetric detection of monofunctional aldehydes in liquid and gas phases
An ammonium chloride–Congo red (NH4Cl-CR) solution is presented as a potential sensing solution for aldehydes. Monofunctional aldehydes such as formaldehyde, acetaldehyde, benzaldehyde, and isobutyraldehyde caused changes in the pH of the sensing solution, producing a color transition from red-orang...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2024-04-01
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| Series: | Open Chemistry |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/chem-2024-0011 |
| _version_ | 1827291041417396224 |
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| author | dela Cruz Ma. Carmela P. Organo Voltaire G. |
| author_facet | dela Cruz Ma. Carmela P. Organo Voltaire G. |
| author_sort | dela Cruz Ma. Carmela P. |
| collection | DOAJ |
| description | An ammonium chloride–Congo red (NH4Cl-CR) solution is presented as a potential sensing solution for aldehydes. Monofunctional aldehydes such as formaldehyde, acetaldehyde, benzaldehyde, and isobutyraldehyde caused changes in the pH of the sensing solution, producing a color transition from red-orange to violet to blue. This distinguished them from the other compounds, thereby acting as a qualitative test for the functional group. The NH4Cl-CR solution was also employed in making filter paper-based and silica gel-based sensors for formaldehyde and acetaldehyde vapors. These sensors responded positively towards the aldehyde gases through a color transition from pink to blue. The NH4Cl-CR mixture provides a simple and easy-to-handle reagent for the detection of both liquid and gaseous aldehydes which has potential applications in environmental monitoring. |
| first_indexed | 2024-04-24T12:29:03Z |
| format | Article |
| id | doaj.art-dae1111961914d28958a55d50992a211 |
| institution | Directory Open Access Journal |
| issn | 2391-5420 |
| language | English |
| last_indexed | 2024-04-24T12:29:03Z |
| publishDate | 2024-04-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Chemistry |
| spelling | doaj.art-dae1111961914d28958a55d50992a2112024-04-08T07:35:36ZengDe GruyterOpen Chemistry2391-54202024-04-01221283410.1515/chem-2024-0011pH-based colorimetric detection of monofunctional aldehydes in liquid and gas phasesdela Cruz Ma. Carmela P.0Organo Voltaire G.1Department of Physical Sciences and Mathematics, College of Arts and Sciences, University of the Philippines, Manila 1000, PhilippinesDepartment of Physical Sciences and Mathematics, College of Arts and Sciences, University of the Philippines, Manila 1000, PhilippinesAn ammonium chloride–Congo red (NH4Cl-CR) solution is presented as a potential sensing solution for aldehydes. Monofunctional aldehydes such as formaldehyde, acetaldehyde, benzaldehyde, and isobutyraldehyde caused changes in the pH of the sensing solution, producing a color transition from red-orange to violet to blue. This distinguished them from the other compounds, thereby acting as a qualitative test for the functional group. The NH4Cl-CR solution was also employed in making filter paper-based and silica gel-based sensors for formaldehyde and acetaldehyde vapors. These sensors responded positively towards the aldehyde gases through a color transition from pink to blue. The NH4Cl-CR mixture provides a simple and easy-to-handle reagent for the detection of both liquid and gaseous aldehydes which has potential applications in environmental monitoring.https://doi.org/10.1515/chem-2024-0011ph indicatorcolorimetricaldehydesformaldehydepaper stripscongo red |
| spellingShingle | dela Cruz Ma. Carmela P. Organo Voltaire G. pH-based colorimetric detection of monofunctional aldehydes in liquid and gas phases Open Chemistry ph indicator colorimetric aldehydes formaldehyde paper strips congo red |
| title | pH-based colorimetric detection of monofunctional aldehydes in liquid and gas phases |
| title_full | pH-based colorimetric detection of monofunctional aldehydes in liquid and gas phases |
| title_fullStr | pH-based colorimetric detection of monofunctional aldehydes in liquid and gas phases |
| title_full_unstemmed | pH-based colorimetric detection of monofunctional aldehydes in liquid and gas phases |
| title_short | pH-based colorimetric detection of monofunctional aldehydes in liquid and gas phases |
| title_sort | ph based colorimetric detection of monofunctional aldehydes in liquid and gas phases |
| topic | ph indicator colorimetric aldehydes formaldehyde paper strips congo red |
| url | https://doi.org/10.1515/chem-2024-0011 |
| work_keys_str_mv | AT delacruzmacarmelap phbasedcolorimetricdetectionofmonofunctionalaldehydesinliquidandgasphases AT organovoltaireg phbasedcolorimetricdetectionofmonofunctionalaldehydesinliquidandgasphases |