Novel Analysis System for the Precise Measurement of Helium Concentration in Soil Gas Based on the Isotope Dilution Method

IF 2.9 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

ACS Earth and Space Chemistry Pub Date : 2025-01-17 DOI:10.1021/acsearthspacechem.4c0020710.1021/acsearthspacechem.4c00207

Yajing Shi, Hanbin Liu*, Junjie Li*, Jianfeng Zhang, Guishan Jin, Juan Han, Jia Zhang, Xiao Shi and Wanfeng Zhang,

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Abstract

Detection of abnormal helium concentration in soil gas is important for helium reservoir exploration. However, because of severe air mixing, helium concentration anomalies in soil gas are extremely weak, and a high-precision analysis system is required to discern them. In this study, we introduce a novel, fully automatic analysis system to determine the helium concentration in soil gas in static mode. The system includes a sample inlet device that can precisely measure the amount of soil gas entering the system, a pretreatment component for helium purification and separation, and a quadrupole mass spectrometer for measuring the helium concentration. The precision of this analysis system for air helium concentration was measured and found to be superior to 1%, sufficient to detect the weak helium concentration anomalies in soil gas. Establishing this method provides a high-efficiency and precise technical approach to identifying weak He concentration anomalies in environmental samples, which is beneficial for helium resource exploration.

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来源期刊

ACS Earth and Space Chemistry Earth and Planetary Sciences-Geochemistry and Petrology

CiteScore

5.30

自引率

11.80%

发文量

249

期刊介绍： The scope of ACS Earth and Space Chemistry includes the application of analytical, experimental and theoretical chemistry to investigate research questions relevant to the Earth and Space. The journal encompasses the highly interdisciplinary nature of research in this area, while emphasizing chemistry and chemical research tools as the unifying theme. The journal publishes broadly in the domains of high- and low-temperature geochemistry, atmospheric chemistry, marine chemistry, planetary chemistry, astrochemistry, and analytical geochemistry. ACS Earth and Space Chemistry publishes Articles, Letters, Reviews, and Features to provide flexible formats to readily communicate all aspects of research in these fields.