Wu Chen Chou, Cao Xiaoan, Wen Qiang, Wang Zehua, Gao Qianqian, Zhu Huichang
Environmental Science and Engineering Institute, Guangzhou University, Guangzhou, China.
Talanta. 2009 Oct 15;79(5):1223-7. doi: 10.1016/j.talanta.2009.04.038. Epub 2009 May 3.
A novel cataluminescence (CTL) sensor using nanosized MgO as the sensing material for determination of the trace of vinyl acetate in air was proposed in the present study. Eight catalysts were examined and the results showed that the CTL intensity on MgO nanoparticles was the strongest. Under the optimized conditions, the linear range of the CTL intensity versus the concentration of vinyl acetate vapor was 2-2000 ppm with a detection limit of 1.0 ppm (3sigma) and a relative standard deviation (R.S.D.) of 1.18% for five times determination of 1000 ppm vinyl acetate. There were no CTL emissions when foreign substances, including ammonia, benzene, acetic acid, formaldehyde and ethyl acetate, passed through the sensor. CTL emissions were detected for methanol, ethanol and acetaldehyde at levels around 5.5%, 10.1% and 13.4% compared with the responsed vinyl acetate. The sensor had a long lifetime more than 100 h.
本研究提出了一种新型的催化发光（CTL）传感器，该传感器使用纳米氧化镁作为传感材料来测定空气中痕量的醋酸乙烯酯。研究考察了八种催化剂，结果表明纳米氧化镁颗粒上的CTL强度最强。在优化条件下，CTL强度与醋酸乙烯酯蒸汽浓度的线性范围为2 - 2000 ppm，检测限为1.0 ppm（3σ），对1000 ppm醋酸乙烯酯进行五次测定的相对标准偏差（R.S.D.）为1.18%。当包括氨、苯、乙酸、甲醛和乙酸乙酯在内的外来物质通过传感器时，没有CTL发射。对于甲醇、乙醇和乙醛，与响应的醋酸乙烯酯相比，CTL发射水平分别约为5.5%、10.1%和13.4%。该传感器具有超过100小时的长寿命。
