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Standards Development
This document specifies a online/offline ultraviolet absorption method for the determination of hydrogen sulphide of natural gas, in the range from 1 mg/m3 to 100 mg/m3.
Hydrogen sulfide content is an important quality index for natural gas products. Internationally, the requirement for hydrogen sulfide in natural gas is generally lower than 20mg/m3, and continuous online monitoring is also specified. Therefore, a fast and continuous online monitoring method standard is needed.
At present, the continuous and rapid optical detection method for natural gas is ISO 20676 ‘Determination of hydrogen sulfide content by laser absorption spectroscopy’, which was developed by ISO/TC 193/SC 3 ‘Natural gas upstream area’. This standard is suitable for the determination of H2S in the range from 15mg/m3 to 3×10^5mg/m3 and can not meet the detection requirement of H2S in natural gas products.
Ultraviolet absorption method has the advantages of fast response (5s), on-site measurement, wide application range, high accuracy and small amount of maintenance, etc. It is widely used in natural gas purification plants, long distance pipeline networks and other production sites.
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