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Related Experiment Video

Updated: Jun 28, 2026

A Sensitive Visual Method for the Detection of Hydrogen Sulfide Producing Bacteria

A Sensitive Visual Method for the Detection of Hydrogen Sulfide Producing Bacteria

Published on: June 27, 2022

A sensor for hydrogen sulphide.

N Kiba¹, M Furusawa

¹Laboratory of Chemistry, Faculty of Engineering, Yamanashi University, Takeda 4-3-11, Kofu-shi, 400, Japan.

|September 1, 1976

Summary

This summary is machine-generated.

This study presents a novel sensor for detecting hydrogen sulphide (H₂S) gas. The sensor utilizes the iodine-azide reaction and demonstrates high selectivity, unaffected by common interfering gases.

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Area of Science:

Analytical Chemistry
Environmental Science
Chemical Sensors

Background:

Hydrogen sulphide (H₂S) is a toxic gas with significant environmental and industrial implications.
Accurate and sensitive detection methods for H₂S are crucial for safety and monitoring.
Existing H₂S sensors may suffer from interference or lack sensitivity.

Purpose of the Study:

To develop and characterize a new sensor for hydrogen sulphide detection.
To evaluate the sensor's performance, including sensitivity, selectivity, and reliability.
To demonstrate the sensor's applicability in the presence of potential interfering compounds.

Main Methods:

A sensor based on the catalytic effect of H₂S on the iodine-azide reaction was designed.
An iodine-azide solution was exuded from a sintered-glass ball, with potential monitored by platinum electrodes.
Gas samples were introduced at a flow-rate of 350 ml/min, with the solution flow-rate at 3.30 ml/min.

Main Results:

The sensor demonstrated high selectivity, with no interference from carbon disulphide, methyl mercaptan, or sulphur dioxide.
The detection limit for hydrogen sulphide was determined to be 5 ng.
The determination limit was 8 ng, with a relative standard deviation of 10%.

Conclusions:

The developed sensor offers a sensitive and selective method for hydrogen sulphide detection.
The sensor's robustness against common interfering gases makes it suitable for various applications.
This technology provides a valuable tool for H₂S monitoring in environmental and industrial settings.