Development of an optical redox chemical sensor for nitrite determination

Quimica nova

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