ISO 20729:2017 PDF

Name: ISO 20729:2017 — Natural gas — Determination of sulfur compounds — Determination of total sulfur content by ultraviolet fluorescence method
SKU: ISO 20729:2017
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Natural gas — Determination of sulfur compounds — Determination of total sulfur content by ultraviolet fluorescence method

Название (английский):

ISO 20729:2017

Natural gas — Determination of sulfur compounds — Determination of total sulfur content by ultraviolet fluorescence method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 27 октября 2017 г.
Издание:: ISO IS 20729 edition 1 version 1
ICS:: 75.060

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Описание (английский):

ISO 20729:2017 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.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 20729:2017 specifies a method for determining the total sulfur content in natural gas using the ultraviolet (UV) fluorescence method. The standard covers sulfur mass concentrations from 1 mg/m3 to 200 mg/m3; higher concentrations can be measured after dilution with a suitable sulfur‑free solvent. The method oxidizes sulfur species to SO2 in a high‑temperature furnace and measures SO2 fluorescence under UV excitation to quantify total sulfur.

Key SEO keywords: ISO 20729:2017, natural gas total sulfur, ultraviolet fluorescence, UV fluorescence method, sulfur compounds, sulfur concentration.

Key topics and requirements

Scope and range: Measurement range 1–200 mg/m3 (dilute >200 mg/m3).

Principle: Combustion/oxidation to SO2 → UV excitation → fluorescence detection by photomultiplier.

Instruments & conditions:

High‑temperature furnace at 1000 °C ± 50 °C.
Quartz cracking tube, dryer (membrane or osmotic) to remove water vapour.
UV fluorescence detector and data recording system.

Gases & reagents:

Carrier gas: argon or helium, purity ≥ 99.99%.
Oxygen: purity ≥ 99.99%.
Calibration gases: certified working standards (H2S or COS in methane/nitrogen) with certificates per ISO 6141.

Calibration:

At least three concentration points, each injected ≥ three times.
Linear regression calibration with correlation coefficient ≥ 0.998.

Sampling & preparation:

Sampling per ISO 10715; materials must be inert to sulfur compounds.
Purge lines 30 s to 2 min to avoid sorption effects.

Precision:

Repeatability and reproducibility limits specified by concentration ranges (examples):
- Repeatability: 1–6 mg/m3 → 0.8 mg/m3; 100–200 mg/m3 → 7.4 mg/m3.
- Reproducibility: 1–6 mg/m3 → 1.1 mg/m3; 100–200 mg/m3 → 11.6 mg/m3.

Safety: Warning that many sulfur compounds are extremely toxic - handle with precautions.

Applications and users

Who benefits from ISO 20729:2017:

Gas laboratories performing routine quality control and compliance testing.

Pipeline operators and transmission companies monitoring sulfur for corrosion and odorization control.

Petrochemical and LNG facilities requiring sulfur-speciation or total sulfur monitoring.

Instrument manufacturers and calibration service providers designing or certifying UV fluorescence analyzers.

Regulatory bodies and auditors establishing measurement protocols for gas quality and safety.

Practical uses:

On‑line and off‑line analysis of pipeline and process gas.

Quality assurance for custody transfer, environmental reporting, and corrosion management.

Instrument calibration and method validation against certified reference gases.

Related standards

ISO 6326‑3 (potentiometry for H2S, mercaptans, COS)

ISO 6326‑5 (Lingener combustion method)

ISO 19739 (gas chromatography for sulfur compounds)

ISO 16960 (oxidative microcoulometry for total sulfur)

ISO 6141, ISO 6142/6144/6145 (reference gas and calibration mixture requirements)

ISO 10715 (natural gas sampling)

This concise guide helps laboratories and industry professionals understand the scope, technical requirements, and practical value of ISO 20729:2017 for accurate natural gas total sulfur measurement using UV fluorescence.

ISO 20729:2017 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

ISO 6141:2015/Amd 1:2020

Gas analysis — Contents of certificates for calibration gas mixtures — Amendment 1: Cross reference list to I…

SIST EN ISO 10715:2023

Natural gas - Gas sampling (ISO 10715:2022)

BS EN ISO 6326-3:1998

Natural gas. Determination of sulfur compounds - Determination of hydrogen sulfide, mercaptan sulfur, and car…

BS EN ISO 6326-5:1998

Natural gas. Determination of sulfur compounds - Lingener combustion method

SIST EN ISO 19739:2006/AC:2009

Natural gas - Determination of sulfur compounds using gas chromatography (ISO 19739:2004/Cor 1:2009)

SIST EN ISO 16960:2014

Natural gas - Determination of sulfur compounds - Determination of total sulfur by oxidative microcoulometry…