scholarly journals Chitosan-Based Quartz Crystal Microbalance for Alcohol Sensing

Electronics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 181 ◽  
Author(s):  
Kuwat Triyana ◽  
Agustinus Sembiring ◽  
Aditya Rianjanu ◽  
Shidiq Hidayat ◽  
Riowirawan Riowirawan ◽  
...  
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Gas Sensing ◽  
Isoamyl Alcohol ◽  
Amyl Alcohol ◽  
Repeated Measurements ◽  
Short Chain ◽  
Hydroxyl Groups ◽  
Hydrogen Bond Formation ◽  
Alcohol Vapor

Short-chain alcohols are a group of volatile organic compounds (VOCs) that are often found in workplaces and laboratories, as well as medical, pharmaceutical, and food industries. Real-time monitoring of alcohol vapors is essential because exposure to alcohol vapors with concentrations of 0.15–0.30 mg·L−1 may be harmful to human health. This study aims to improve the detection capabilities of quartz crystal microbalance (QCM)-based sensors for the analysis of alcohol vapors. The active layer of chitosan was immobilized onto the QCM substrate through a self-assembled monolayer of L-cysteine using glutaraldehyde as a cross-linking agent. Before alcohol analysis, the QCM sensing chip was exposed to humidity because water vapor significantly interferes with QCM gas sensing. The prepared QCM sensor chip was tested for the detection of four different alcohols: n-propanol, ethanol, isoamyl alcohol, and n-amyl alcohol. For comparison, a non-alcohol of acetone was also tested. The prepared QCM sensing chip is selective to alcohols because of hydrogen bond formation between the hydroxyl groups of chitosan and the analyte. The highest response was achieved when the QCM sensing chip was exposed to n-amyl alcohol vapor, with a sensitivity of about 4.4 Hz·mg−1·L. Generally, the sensitivity of the QCM sensing chip is dependent on the molecular weight of alcohol. Moreover, the developed QCM sensing chips are stable after 10 days of repeated measurements, with a rapid response time of only 26 s. The QCM sensing chip provides an alternative method to established analytical methods such as gas chromatography for the detection of short-chain alcohol vapors.

Electrospun polyvinyl acetate nanofiber modified quartz crystal microbalance for detection of primary alcohol vapor

2020 ◽  
Vol 301 ◽  
pp. 111742 ◽  
Author(s):  
Aditya Rianjanu ◽  
Kuwat Triyana ◽  
Doni B. Nugroho ◽  
Ahmad Kusumaatmaja ◽  
Roto Roto
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Polyvinyl Acetate ◽  
Primary Alcohol ◽  
Alcohol Vapor

Effect of humidity on the CO gas sensing of ZnSn(OH) 6 film via quartz crystal microbalance technique

2016 ◽  
Vol 657 ◽  
pp. 691-696 ◽  
Author(s):  
Hu Wang ◽  
Xiaoxiong Liu ◽  
Juan Xie ◽  
Ming Duan ◽  
Junlei Tang
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Gas Sensing ◽  
Co Gas

Molecular Imprinting Polymer-Based QCM Sensor for Detection of α-Pinene

2020 ◽  
Vol 840 ◽  
pp. 418-423
Author(s):  
Nur Aisyah Humairah ◽  
Fadlunisa Fadlunisa ◽  
Kiki Amalia Histhiningtyas ◽  
Innas Amaliya Fatyadi ◽  
Roto Roto ◽  
...  
Keyword(s):  
Quartz Crystal Microbalance ◽  
Molecular Imprinting ◽  
Spin Coating ◽  
Quartz Crystal ◽  
Amyl Alcohol ◽  
Spin Coating Technique ◽  
Coating Technique ◽  
Molecular Imprinting Polymer ◽  
Heating Treatment

The quartz crystal microbalance (QCM) modified by chitosan/α-pinene, prepared by spin-coating technique has been successfully developed with molecular imprinting polymer (MIP) concept. To remove the template, we carried out two treatments namely heating and vacuum in a desiccator. To find out selectivity of the sensor, the QCM modified with polymer chitosan has been tested with another analyte such as acetone, ethanol, N-amyl alcohol, iso-amyl alcohol. The result shows that chitosan/α-pinene coated QCM sensor can provide a good response as good as sensitivity. The best QCM at heating treatment in a furnace with the decline of frequency is 32 Hz, then the QCM vacuum pumping treatment with decline frequency is 27 Hz.

scholarly journals Pengukuran solubilitas n-amylalkohol dalam poly (n-butyl methacrylate) dan polyisobutylene menggunakan metode piezoelectric-quartz crystal microbalance sorption

2018 ◽  
Vol 4 (3) ◽  
pp. 264
Author(s):  
Gede Wibawa ◽  
Rica Widi Lestari ◽  
Sofia Wardhani
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Amyl Alcohol ◽  
Butyl Methacrylate ◽  
Absolute Deviation ◽  
Piezoelectric Quartz ◽  
Lower Solubility ◽  
Present Apparatus ◽  
Higher Temperature ◽  
Piezoelectric Quartz Crystal

The Piezoelectric Quartz Crystal Microbalance (QCM) method was used to measure the solubilities of n-amylalcohol in poly (n-butyl methac1ylate) and polyisobutylene at temperatures of 333.15 K, 353.15 K and 353.15 K. The crystals used were 5 MHz, AT-Cut, 5.5 mm in diameter and 0.3 mm in thick. Reliability of the measurements was comfirmed by comparing the present data with the literature data for the system of benzene-polyisobutylene at temperature 338.15K. The solubilities n-amyl alcohol in polyisobutylene were undectedable in the range of temperature experiments by the present apparatus because of the low solubility. For the solubilities of n-amyl alcohol in ploy (n-butyl methacryalate) the higher temperature, the lower solubility and the experimental data could be correlated by the UNIQUAC equation with average absolute deviation between experimental and calculated solvent activities of 3.8%. Keywords: Solubility, Quartz Crystal Microbalance, Solvent, Polymer AbstrakDalam penelitian ini, metode Piezoelectric Quartz Crystal Microbalance (QCM) digunakan untuk mengukur kelarutan pelarut n-amylalkohol dalam polimer poly (n-butyl methacrylate) dan polyisobutylene pada temperatur 333,15 K, 343,15 K dan 353,15 K. Kristal yang digunakan adalah jenis AT-Cut 5 MHz, diameter 5,5 mm dan ketebalan 0,3 mm. Reliabilitas dari pengukuran di tes dengan membandingkan hasil pengukuran dengan data literatur untuk sistem benzene­polyisobutylene pada temperatur 338, I 5K. Kelarutan n-amyl alkohol dalam polyisobutylene tidak dapat terdeteksi pada range temperatur eksperimen dengan peralatan yang ada karena kelarutannya rendah. Untuk kelarutan n-amylalkohol dalam poly(n-butyl methacrylate), semakin besar suhu, kelarutannya semakin rendah dan data eksperimen dapat dikorelasikan menggunakan persamaan UNIQUAC dengan rata-rata deviasi ahsolut sebesar 3,8%.Kata Kunci: Kelarutan, Quartz Crystal Microbalance, Pelarut, Polimer

scholarly journals A Quartz Crystal Microbalance Based Portable Gas Sensing Platform for On-Demand Human Breath Monitoring

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 146166-146171
Author(s):  
Ryuki Suzuki ◽  
Takaki Emura ◽  
Yuki Tokura ◽  
Naoya Kawamura ◽  
Yutaka Hori
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Gas Sensing ◽  
Human Breath ◽  
On Demand ◽  
Sensing Platform ◽  
Breath Monitoring

Sugar nanowires based on cyclodextrin on quartz crystal microbalance for gas sensing with ultra-high sensitivity

2013 ◽  
Vol 84 ◽  
pp. 196-199 ◽  
Author(s):  
Atsushi Asano ◽  
Yuta Maeyoshi ◽  
Shogo Watanabe ◽  
Akinori Saeki ◽  
Masaki Sugimoto ◽  
...  
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Gas Sensing ◽  
High Sensitivity

scholarly journals Electrospun PEDOT:PSS/PVP Nanofibers for CO Gas Sensing with Quartz Crystal Microbalance Technique

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Hong-Di Zhang ◽  
Xu Yan ◽  
Zhi-Hua Zhang ◽  
Gu-Feng Yu ◽  
Wen-Peng Han ◽  
...  
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Composite Nanofibers ◽  
Gas Sensing ◽  
Room Temperature Resistivity ◽  
Sensing Applications ◽  
Co Concentration ◽  
The Relationship ◽  
Temperature Resistivity ◽  
Co Gas

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/polyvinylpyrrolidone (PEDOT:PSS/PVP) composite nanofibers were successfully fabricated via electrospinning and used as a quartz crystal microbalance (QCM) sensor for detecting CO gas. The electrical property of individual PEDOT:PSS/PVP nanofibers was characterized and the room temperature resistivity was at the magnitude of 105 Ω·m. The QCM sensor based on PEDOT:PSS/PVP nanofibers was sensitive to low concentration (5–50 ppm) CO. In the range of 5–50 ppm CO, the relationship between the response of PEDOT:PSS nanofibers and the CO concentration was linear. Nevertheless, when the concentration exceeded 50 ppm, the adsorption of the nanofiber membrane for CO gas reached saturation and the resonant frequency range had no change. Therefore, the results open an approach to create electrospun PEDOT:PSS/PVP for gas sensing applications.

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