GB/T 46918.2-2025 Active
GB/T 46918.2-2025 Fine bubble technology—Evaluation method for determining gas content in fine bubble dispersions in water—Part 2:Hydrogen content
Abstract
This document describes the method for measuring the hydrogen content (molecular hydrogen) in microbubble dispersions and establishes the measurement procedure.
This document is applicable to the measurement of hydrogen content in ultrafine bubble dispersions using titration and gas chromatography methods. The measurement of hydrogen content in microbubble dispersions can also be conducted in accordance with this method.
Note 1: Titration can be used as a rapid method for estimating the hydrogen content in ultrafine bubble dispersions. Its detection limit is 0.1 mg/L, and the acceptable accuracy range is 0.2 mg/L to 1.6 mg/L. Oxidizing or reducing substances present in the dispersion can affect the measurement results and reduce the accuracy of the measurement.
Note 2: Gas chromatography offers a significantly higher measurement accuracy and a lower detection limit. The presence of ultrafine bubbles in water does not affect the measurement results, and the presence of oxidizing or reducing substances does not affect the measurement accuracy. However, this measurement takes a long time.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 46918.2-2025 |
| CCS | Environment conditions and general testing methods |
| ICS | Physics, Chemistry |
| Implement Date | 2026-07-01 |