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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.


Relationship between peak areas of ethanol and acetone and the injection port temperature.
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f6-sensors-07-00202: Relationship between peak areas of ethanol and acetone and the injection port temperature.

Mentions: A mixture with equal volumes of ethanol and acetone was injected into the sensor system after fixing the following parameters, VH = 5.5 V of the heating coil, VC = 20 V of the circuit sensor, RL = 68 kΩ. The injection port temperature was varied between 70 and 190 °C. The injection port temperature was operated at a temperature high enough to ensure rapid volatilization of the liquid mixtures in order to avoid the condensation of acetone and ethanol. The relationship between peak area and of the injection port temperature is shown in Figure 6. A temperature of 150 °C was selected for the entire testing of ethanol and acetone with the TGS 822 sensor head.


Home-made Detection Device for a Mixture of Ethanol and Acetone
Relationship between peak areas of ethanol and acetone and the injection port temperature.
© Copyright Policy
Related In: Results  -  Collection

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

f6-sensors-07-00202: Relationship between peak areas of ethanol and acetone and the injection port temperature.
Mentions: A mixture with equal volumes of ethanol and acetone was injected into the sensor system after fixing the following parameters, VH = 5.5 V of the heating coil, VC = 20 V of the circuit sensor, RL = 68 kΩ. The injection port temperature was varied between 70 and 190 °C. The injection port temperature was operated at a temperature high enough to ensure rapid volatilization of the liquid mixtures in order to avoid the condensation of acetone and ethanol. The relationship between peak area and of the injection port temperature is shown in Figure 6. A temperature of 150 °C was selected for the entire testing of ethanol and acetone with the TGS 822 sensor head.

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.