Transient parameters of a coated quartz crystal microbalance sensor for the detection of volatile organic compounds (VOCs)

Application of a Quartz Crystal Microbalance (QCM) System Coated with Chromatographic Adsorbents for the Detection of Olive Oil Volatile Compounds

“…Selected sensors show different sensitivities to volatile compounds. In general, high sensitivities of the sensors have been detected, compared with previous works [6,15]. Smaller sensitivities of the six sensors have been found for 2-butanone volatile compound.…”

“…Ten gas chromatographic stationary phases were selected and used as sensing films due to their characteristics of polarity, stability and sensibility [11] A spin coating method was used to coat the adsorbent on the surface of the gold electrodes [12]. An adsorbent and PVC were mixed together and dissolved in THF [13]. Ten microliters of the cocktail were dispensed onto the surface of the gold electrode by using a micropipette.…”

“…Sensor construction process repeatability was studied by using OV-275 adsorbent chromatographic material because it is easier to apply due to its viscosity. Therefore, sensing film of sensor S24 (6 mg OV-275 adsorbent in a tetrahidrofurane solvent solution [6]) was prepared and dropped, by spin coating method (Subsection 2.1), onto the gold electrode surface of the same quartz crystal resonator, during five days and three times a day, i.e. sensor S24 was constructed fifteen times.…”

“…Among all kinds of sensors, quartz crystal microbalance (QCM) sensor has attracted our attention for its low cost, compact volume, easy portability and high sensitivity [6]. QCM is extensively employed in gas analysis since it was first introduced by King in 1964: detection and identification of organic vapors, food analysis, continuous monitoring of volatile chloroorganic compounds, determination of iodine in foodstuffs, QCM as humidity sensor, detection of BTEX compounds vapors, speciation of nitroaromatic compounds in landfill gas, detection of wine volatiles, determination of organophosphorus and carbamate pesticides, monitoring of apple flavor, determination of the ripening state of Emmental cheese, monitoring of the performance of an odor biofilter, characterization of Fuji apples, determination of ammonia and aliphatic amines, rapid detection of Escherichia coli O157:H7, determination of chlorinated aliphatic hydrocarbons in air, Salmonella detection, tomato aroma profiling, discrimination of CH 3 SH, identification of volatile organic compounds, detection of mesothelin in pancreatic cancer cell line supernatant, GMOs detection, determination of trace metal ions in solution or detection of microbial populations [5,7,8].…”

Developing ofN‐(4‐methylpyrimidine‐2‐yl)methacrylamideLangmuir–Blodgettthin film chemical sensor via quartz crystal microbalance technique

“…Some aliphatic polymers such as polyaniline (Ayad, El-Hefnawey, & Torad, 2009), polyethylene oxide (Zhou, Lee, Xu, & Yoon, 2015), and polyvinyl chloride (Shafiqul Islam et al, 2005) and some aromatic polymers such as poly vinyl pyrrolidone (Kessick & Tepper, 2006) and chitosan (Ayad & Minisy, 2016) are the materials that have been used in the preparation of LB thin films and characterized as gas sensor elements. Production and characterization of monomer/polymer based gas sensor elements having improved physical interactions with gases and increased the rate of absorption and desorption, that are capable of reacting rapidly to polar or nonpolar harmful volatile compounds have been tried by various researchers (Li et al, 2006;Matsuguchi & Uno, 2006;Sen, Shrestha, Shrestha, Ariga, & Valiyaveettil, 2015).…”