Mirmohseni Abdolreza, Olad Ali
Polymer Research Technology Laboratory, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
Anal Sci. 2010 Jan;26(1):89-93. doi: 10.2116/analsci.26.89.
A polystyrene coated quartz crystal nanobalance (QCN) sensor was developed for use in the determination of a number of linear short-chain aliphatic aldehyde and ketone vapors contained in air. The quartz crystal was modified by a thin-layer coating of a commercial grade general purpose polystyrene (GPPS) from Tabriz petrochemical company using a solution casting method. Determination was based on frequency shifts of the modified quartz crystal due to the adsorption of analytes at the surface of modified electrode in exposure to various concentrations of analytes. The frequency shift was found to have a linear relation to the concentration of analytes. Linear calibration curves were obtained for 7-70 mg l(-1) of analytes with correlation coefficients in the range of 0.9935-0.9989 and sensitivity factors in the range of 2.07-6.74 Hz/mg l(-1). A storage period of over three months showed no loss in the sensitivity and performance of the sensor.
开发了一种聚苯乙烯涂层石英晶体纳米天平（QCN）传感器，用于测定空气中所含的多种直链短链脂肪族醛和酮蒸气。采用溶液浇铸法，用大不里士石化公司生产的商业级通用聚苯乙烯（GPPS）薄层涂层对石英晶体进行了改性。测定基于改性石英晶体在暴露于各种浓度分析物时，由于分析物在改性电极表面的吸附而产生的频率变化。发现频率变化与分析物浓度呈线性关系。对于7 - 70 mg l(-1)的分析物，获得了线性校准曲线，相关系数在0.9935 - 0.9989范围内，灵敏度因子在2.07 - 6.74 Hz/mg l(-1)范围内。超过三个月的储存期表明传感器的灵敏度和性能没有损失。
