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Home-made Detection Device for a Mixture of Ethanol and Acetone

View Article: PubMed Central

ABSTRACT

A device for the detection and determination of ethanol and acetone was constructed, consisting of a packed column, a chamber with a sensor head, 2 dc power supplies, a multimeter and a computer. A commercially available TGS 822 detector head (Figaro Company Limited) was used as the sensor head. The TGS 822 detector consists of a SnO2 thick film deposited on the surface of an alumina ceramic tube which contains a heating element inside. An analytical column was coupled with the setup to enhance the separation of ethanol and acetone before they reached the sensor head. Optimum system conditions for detection of ethanol and acetone were achieved by varying the flow rate of the carrier gas, voltage of the heating coil (VH), voltage of the circuit sensor (VC), load resistance of the circuit sensor (RL) and the injector port temperature. The flow of the carrier gas was 15 mL/min; the circuit conditions were VH = 5.5 V, VC = 20 V, RL = 68 kΩ; and the injection port temperature was 150°C. Under these conditions the retention times (tR) for ethanol and acetone were 1.95 and 0.57 minutes, respectively. Calibration graphs were obtained for ethanol and acetone over the concentration range of 10 to 160 mg/L. The limits of detection (LOD) for ethanol and acetone were 9.25 mg/L and 4.41 mg/L respectively.

No MeSH data available.


Acetone calibration curve in the 5-40 mg/L concentration range
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f9-sensors-07-00202: Acetone calibration curve in the 5-40 mg/L concentration range

Mentions: Standard solutions of ethanol and acetone the range from 10-60 ppm and 5-40 ppm, respectively, were prepared. 1 μL of each concentration was injected into the sensor system under the optimum conditions. The TGS 822 response values in terms of peak areas were plotted against concentration of standard solution for construction of the calibration graphs as shown in Figures 8 and 9 for ethanol and acetone, respectively. The limits of detection were 9.27 mg/L and 4.41 mg/L for ethanol and acetone, respectively, as shown in Table 1.


Home-made Detection Device for a Mixture of Ethanol and Acetone
Acetone calibration curve in the 5-40 mg/L concentration range
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3756701&req=5

f9-sensors-07-00202: Acetone calibration curve in the 5-40 mg/L concentration range
Mentions: Standard solutions of ethanol and acetone the range from 10-60 ppm and 5-40 ppm, respectively, were prepared. 1 μL of each concentration was injected into the sensor system under the optimum conditions. The TGS 822 response values in terms of peak areas were plotted against concentration of standard solution for construction of the calibration graphs as shown in Figures 8 and 9 for ethanol and acetone, respectively. The limits of detection were 9.27 mg/L and 4.41 mg/L for ethanol and acetone, respectively, as shown in Table 1.

View Article: PubMed Central

ABSTRACT

A device for the detection and determination of ethanol and acetone was constructed, consisting of a packed column, a chamber with a sensor head, 2 dc power supplies, a multimeter and a computer. A commercially available TGS 822 detector head (Figaro Company Limited) was used as the sensor head. The TGS 822 detector consists of a SnO2 thick film deposited on the surface of an alumina ceramic tube which contains a heating element inside. An analytical column was coupled with the setup to enhance the separation of ethanol and acetone before they reached the sensor head. Optimum system conditions for detection of ethanol and acetone were achieved by varying the flow rate of the carrier gas, voltage of the heating coil (VH), voltage of the circuit sensor (VC), load resistance of the circuit sensor (RL) and the injector port temperature. The flow of the carrier gas was 15 mL/min; the circuit conditions were VH = 5.5 V, VC = 20 V, RL = 68 kΩ; and the injection port temperature was 150°C. Under these conditions the retention times (tR) for ethanol and acetone were 1.95 and 0.57 minutes, respectively. Calibration graphs were obtained for ethanol and acetone over the concentration range of 10 to 160 mg/L. The limits of detection (LOD) for ethanol and acetone were 9.25 mg/L and 4.41 mg/L respectively.

No MeSH data available.