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Related Experiment Video

Updated: Sep 13, 2025

Microdialysis of Ethanol During Operant Ethanol Self-administration and Ethanol Determination by Gas Chromatography

Microdialysis of Ethanol During Operant Ethanol Self-administration and Ethanol Determination by Gas Chromatography

Published on: September 5, 2012

Highly Selective Ethanol MEMS Sensor and U-Disk Detector Based on Solid Phase Extraction for Breath Alcohol

Renjun Si¹, Renminxi Ou², Jinbo Yang¹

¹State Key Laboratory of Material Processing and Die & Mould Technology, Department of Materials Science and Engineering, Huazhong University of Science and Technology, Hubei 430074, PR China.

|July 31, 2025

Summary

This study introduces a novel drunk driving detector that precisely measures ethanol in breath. It overcomes interference issues, offering enhanced accuracy and anti-interference capabilities for traffic safety.

Keywords:

MEMS breath alcohol detection gas sensor solid phase extraction temperature modulation

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Last Updated: Sep 13, 2025

Microdialysis of Ethanol During Operant Ethanol Self-administration and Ethanol Determination by Gas Chromatography

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Published on: September 5, 2012

Real-time Breath Analysis by Using Secondary Nanoelectrospray Ionization Coupled to High Resolution Mass Spectrometry

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Published on: March 9, 2018

A High Performance Impedance-based Platform for Evaporation Rate Detection

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Published on: October 17, 2016

Area of Science:

Materials Science
Chemical Sensors
Traffic Safety Engineering

Background:

Drunk driving poses a significant global traffic safety risk, contributing to 50-60% of accidents.
Existing metal oxide gas sensors lack selectivity, leading to cross-interference in drunk driving detection.
Volatile organic compounds (VOCs) in exhaled breath can interfere with ethanol detection.

Purpose of the Study:

To develop a highly selective ethanol sensor for drunk driving detection.
To address the cross-interference problem in breath analysis using temperature modulation.
To create a portable and sensitive drunk driving detection device.

Main Methods:

Utilized selective extraction and programmed temperature desorption (PTD) technology.
Developed a temperature-modulated on-chip PTD ethanol sensor with ZSM-5 and Pt@SnO2.
Optimized temperature modulation parameters (heating/cooling rates, adsorption time) for precise ethanol quantification.

Main Results:

Achieved high selectivity for ethanol detection in exhaled breath.
Minimized interference from other VOCs, with a maximum deviation equivalent to 5.20 ppm ethanol.
Integrated the sensor into a portable U-disk drunk driving detector with superior sensitivity and anti-interference.

Conclusions:

The developed sensor effectively solves the cross-interference issue in ethanol detection.
The portable drunk driving detector demonstrates significant improvements over commercial products.
The rapid ethanol extraction by ZSM-5 is key to the sensor's high selectivity.