ISO 20729:2017 天然ガス—硫黄化合物の測定—紫外線蛍光法による総硫黄含有量の測定 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 193, Natural gas, Subcommittee SC 1, Analysis of natural gas.

Introduction

Four methods for determination of sulfur compounds in natural gas already exist as International Standards:

• ISO 6326-3, Natural gas — Determination of sulfur compounds — Part 3: Determination of hydrogen sulfide, mercaptan sulfur and carbonyl sulfide sulfur by potentiometry;
• ISO 6326-5, Natural gas — Determination of sulfur compounds — Part 5: Lingener combustion method;
• ISO 19739 , Natural gas — Determination of sulfur compounds using gas chromatography;
• ISO 16960, Natural gas — Determination of sulfur compounds —Determination of total sulfur by oxidative microcoulometry method.

Ultraviolet fluorescence method is more efficient method compared with potentiometry, because it can measure the result value at once. It is also environment friendly compared with potentiometry, Lingener and oxidative microcoulometry methods which use toxic and hazardous reagents. Moreover, it is much more convenient and stable than existing natural gas total sulfur analysis method, because the method is sensitive to less number of interference factors.

1 Scope

This method applies to the determination of total sulfur content in natural gas expressed as sulfur mass concentration ranging from 1 mg/m³ to 200 mg/m³. Natural gas with sulfur contents above 200 mg/m³ can be analysed after dilution with a suitable sulfur-free solvent.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

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Bibliography