A Quartz Crystal Microbalance Sensor for Detection of Geraniol in Black Tea

作者：Sharma Prolay^*; Ghosh Arunangshu; Tudu Bipan; Bhuyan Lakshi Prasad; Tamuly Pradip; Bhattacharyya Nabarun; Bandyopadhyay Rajib; Das Udhab

来源：IEEE Sensors Journal, 2015, 15(2): 1178-1185.

DOI：10.1109/JSEN.2014.2359741

• Black tea
• beta-cyclodextrin
• gas chromatography mass spectrometry
• geraniol
• quartz crystal microbalance

Geraniol is one of the important qualities determining volatile components of black tea. This paper presents a quartz crystal microbalance sensor to detect geraniol from black tea aroma. The sensor is developed using beta-cyclodextrin (beta-CD). beta-CD is a flavor encapsulating material with toroidal bucket-like structure, whose inside-cavity is hydrophobic and the outside is hydrophilic and it is found to be a suitable coating material for detecting geraniol. Extensive experiments have been carried out with the beta-CD sensor and it is observed that the sensor offers better sensitivity for geraniol in comparison with other important constituents of black tea such as linalool, linalool oxide, methyl salicylate, and trans-2-hexenal. Experiments with ten Darjeeling orthodox black tea samples have been carried out with the developed sensor and a correlation factor of 0.9925 has been obtained with the corresponding gas chromatography mass spectrometry analysis.

• 出版日期2015-2