Dissolved H2S assay

Dissolved H2S analysis measures the concentration of hydrogen sulfide (CAS No. 7783-06-4 ) present in dissolved form within a liquid matrix or a degrading environment. A characteristic marker of anaerobic fermentation and decomposition processes, H2S is an odorous, corrosive, and toxic compound. Monitoring its concentration is essential for product quality, facility safety, and equipment protection. At YesWeLab, this dissolved H2S analysis is entrusted to partner laboratories selected according to your specific matrix and requirements.

Why measure dissolved H2S?

Dissolved hydrogen sulfide (H2S) is formed during the decomposition of organic matter in the absence of oxygen, particularly in wastewater, digestates, and fermentation products. Its presence indicates anaerobic activity and can lead to several problems: unpleasant odors, corrosion of materials and pipes, product spoilage, and health risks for operators. Measuring dissolved H2S therefore serves several purposes: monitoring a methanization or fermentation process, preventing the degradation of materials and packaging, controlling effluent quality, and ensuring safe working conditions. It is a key indicator for monitoring and managing risks.

H2S analysis techniques

The quantification of hydrogen sulfide can be achieved using several methods, chosen according to the matrix and the level of precision required:

• GC-MS (gas chromatography coupled with mass spectrometry): for specific identification and quantification of H2S and associated sulfur compounds.
• Colorimetry : a rapid control method suitable for certain matrices.
• Electrochemistry : for targeted monitoring of sulfide concentration.

The choice of technique depends on the nature of the sample and the target limit of quantification. Our scientific team will guide you towards the method best suited to your objectives.

Sectors and matrices concerned

This analysis is particularly relevant to the packaging and materials/polymer sectors , where H2S can indicate degradation or outgassing, but also for the environmental monitoring of wastewater, digestate, and fermentation products. This physicochemical expertise is part of a comprehensive approach to controlling sulfur compounds and emitted gases.

Accredited laboratories and expert support

At YesWeLab, we collaborate with a carefully selected network of laboratories, most of which are certified and/or accredited (ISO 17025, COFRAC, etc.). These laboratories are chosen based on your specific needs, the matrices to be analyzed, and the required analytical techniques or methods. If you have any particular requirements, please specify them in your request: our scientific team will do everything possible to respond accurately and promptly.

Since 2020, many manufacturers, distributors and design offices have trusted us to manage their analyses, entrusting us with their samples via our digital platform.

Additional analyses

For complete control of gases and volatile compounds resulting from degradation or fermentation, the measurement of dissolved H2S is combined with other analyses offered by YesWeLab:

• Emitted gas analysis — to characterize the gases released by a material or process.
• Measurement of volatile organic compounds (VOCs) — to expand emissions monitoring.

Discover also our expertise in air and gas analysis, our GC-MS, and our laboratories by sector: environmental analyses and polymers and materials.

Request your dissolved H2S dosage

To learn more or submit a specific request, add this analysis to your quote or contact our team now. We offer a customized solution, from method selection to results interpretation.