Quimica nova | |
Development of an optical redox chemical sensor for nitrite determination | |
Rastegarzadeh, Saadat1  Kalantaripour, Mehdi1  | |
[1] Shahid Chamran University, Ahvaz, Iran | |
关键词: optical sensor; nitrite; methyltrioctylammonium chloride.; | |
DOI : 10.1590/S0100-40422012000400021 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
An optical chemical sensor for the determination of nitrite based on incorporating methyltrioctylammonium chloride as an anionic exchanger on the triacetylcellulose polymer has been reported. The response of the sensor is based on the redox reaction between nitrite in aqueous solution and iodide adsorbed on sensing membrane using anion exchange phenomena. The sensing membrane reversibly responses to nitrite ion over the range of 6.52×10-6 8.70×10-5 mol L-1 with a detection limit of 6.05×10-7 mol L-1 (0.03 µg mL-1) and response time of 6 min. The relative standard deviation for eight replicate measurements of 8.70×10-6 and 4.34×10-5 mol L-1 of nitrite was 4.4 and 2.5 %, respectively. The sensor was successfully applied for determination of nitrite in food, saliva and water samples.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
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RO201902017027658ZK.pdf | 305KB | download |