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Related Experiment Video

Updated: Jul 12, 2026

Fast and Accurate Exhaled Breath Ammonia Measurement

Fast and Accurate Exhaled Breath Ammonia Measurement

Published on: June 11, 2014

Ultrasensitive amine gas sensor with ppb-level detection based on vernier effect.

Xueqiang Liu¹, XinYu Wang¹, WenLong Xu¹

¹School of Information Science and Engineering, The Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, Yanshan University, Qinhuangdao 066004, China. liuxq003@ysu.edu.cn.

Analytical Methods : Advancing Methods and Applications

|July 10, 2026

Summary

This study introduces a novel fiber F-P sensor using the vernier effect for ultra-sensitive detection of amine gases at ppb levels. The sensor achieves high sensitivity and reliability, crucial for environmental and safety monitoring.

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Last Updated: Jul 12, 2026

Fast and Accurate Exhaled Breath Ammonia Measurement

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Published on: June 11, 2014

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

Area of Science:

Chemical Sensors
Optical Sensing
Environmental Science

Background:

Trace detection of amine gases is vital for environmental monitoring, industrial safety, and public health.
Current sensing systems face challenges in achieving both ultra-high sensitivity and stable performance.

Purpose of the Study:

To develop a highly sensitive and reliable fiber F-P sensor for trace amine gas detection.
To leverage the vernier effect for signal amplification in amine sensing.

Main Methods:

A parallel-structured fiber F-P sensor was designed and fabricated.
The vernier effect was utilized to enhance the sensor's sensitivity.
Performance was evaluated for detection of pyrrolamine and putrescine at ppb levels.

Main Results:

A 24-fold vernier structure achieved a detection limit of 0.066 ppb for pyrrolamine and 0.089 ppb for putrescine.
Sensitivity was significantly enhanced, reaching 301.68 pm/ppb for pyrrolamine and 225.33 pm/ppb for putrescine.
The sensor demonstrated excellent selectivity with response coefficients below 0.50 pm/ppb for interfering gases.

Conclusions:

The proposed vernier-structured fiber F-P sensor offers ultra-high sensitivity and stable performance for amine gas detection.
This technology addresses the trade-off between sensitivity and reliability in trace gas sensing.
The sensor shows great potential for applications in environmental monitoring and industrial safety.