| Autor: |
Raquel R A, Soares, Robert G, Hjort, Cícero C, Pola, Dapeng, Jing, Victor S, Cecon, Jonathan C, Claussen, Carmen L, Gomes |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Mikrochimica actaReferences. 190(1) |
| ISSN: |
1436-5073 |
| Popis: |
Nitrite is an important food additive for cured meats; however, high nitrite levels pose adverse health effects to humans. Hence, monitoring nitrite concentration is critical to comply with limits imposed by regulatory agencies. Laser-induced graphene (LIG) has proven to be a scalable manufacturing alternative to produce high-performance electrochemical transducers for sensors. Herein, we expand upon initial LIG studies by fabricating hydrophilic and hydrophobic LIG that are subsequently converted into ion-selective sensors to monitor nitrite in food samples with comparable performance to the standard photometric method (Griess method). The hydrophobic LIG resulted in an ion-selective electrode with improved potential stability due partly to a decrease in the water layer between the electrode and the nitrite poly(vinyl) chloride-based ion-selective membrane. These resultant nitrite ion-selective sensors displayed Nernstian response behavior with a sensitivity of 59.5 mV dec |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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