GB/T 11060.4-2017Natural gas -- Determination of sulfur compound -- Part 4: Determination of total sulfur content by oxidative micro-coulometry method (English PDF)

Foreword

GB/T 11060 "Natural gas - Determination of sulfur compound" is divided into

the following 12 parts.

- Part 1. Determination of hydrogen sulfide content by iodometric titration

method;

- Part 2. Determination of hydrogen sulfide content by methylene blue

method;

- Part 3. Determination of hydrogen sulfide content by lead acetate reaction

rate dual photo path method;

- Part 4. Determination of total sulfur content by oxidative microcoulometry

method;

- Part 5. Determination of total sulfur content by hydrogenolysis and

rateometric colorimetry method;

- Part 6. Determination of hydrogen sulfide, mercaptan sulfur and carbonyl

sulfide sulfur by potentiometry;

- Part 7. Determination of total sulfur content by Lingener combustion method;

- Part 8. Determination of total sulfur content by ultraviolet fluorescence

method;

- Part 9. Determination of mercaptan sulfur content by iodometric titration

method;

- Part 10. Determination of sulfur compounds using gas chromatography

method;

- Part 11. Determination of mercaptan sulfur content by iodometric titration

method;

- Part 12. Determination of hydrogen sulfide content by laser absorption

spectroscopy.

This part is part 4 of GB/T 11060.

This part was drafted in accordance with the rules given in GB/T 1.1-2009.

This part is an amendment to GB/T 11060.4-2010 "Natural gas - Determination

of sulfur compound - Part 4. Determination of total sulfur content by oxidative

microcoulometry method". As compared with GB/T 11060.4-2010, in addition to

editorial changes, the main technical changes of this part are as follows.

Natural gas - Determination of sulfur compound –

Part 4. Determination of total sulfur content by

oxidative microcoulometry method

Warning - This part does not cover all safety issues related to its

application. Before using this part, the user is responsible for formulating

corresponding safety and protection measures, and defining the scope of

application.

1 Scope

This part of GB/T 11060 specifies the test method of using the microcoulometry

method for the determination of total sulfur in natural gas.

This part applies to the determination of total sulfur in natural gas. The

measurement range is 1 mg/m3 ~ 200 mg/m3, and the measurement range can

be extended to higher concentrations by dilution.

2 Normative references

The following documents are essential to the application of this document. For

the dated documents, only the versions with the dates indicated are applicable

to this document; for the undated documents, only the latest version (including

all the amendments) are applicable to this standard.

GB/T 6682 Water for analytical laboratory use - Specification and test

methods (GB/T 6682-2008, ISO 3696.1987, MOD)

GB/T 8170 Rules of rounding off for numerical values & expression and

judgement of limiting values

GB/T 13609 Natural gas sampling guidelines (GB/T 13609-2017, ISO

10715.1997, MOD)

3 Test principles

Sulfur-containing natural gas is mixed and combusted with oxygen in a quartz

conversion tube, the sulfur is converted into sulfur dioxide, which enters the

titration tank with nitrogen and reacts with iodine. Iodine consumed is

supplemented by electrolytic potassium iodide. In accordance with the

Faraday's law of electrolysis, the amount of sulfur in the sample is calculated

from the amount of electricity consumed by the electrolysis and calibrated with

a gas reference material.

4 Reagents

5 Instruments

7 Test procedures

8 Calculation