1. Why is it necessary to determine halogen and sulfur contents in petrochemical samples?

Fluorine, chlorine, bromine and sulfur in petrochemical and auxiliary products are key quality control indicators:

l Corrosion Risk: Chlorine and sulfur can corrode equipment pipelines, catalysts and furnace bodies, shortening service life.

l Catalyst Poisoning: Halogens at ppm level can lead to permanent deactivation of reforming and hydrogenation catalysts.

l Environmental Compliance: Sulfur emissions affect air quality; halogen residues relate to product safety and export standards.

l Quality Control: Halogen and sulfur contents directly determine the grade and market value of oil products, chemical raw materials and by-products.

2. Standards :

· ASTM D7359-23

· ASTM D8150-17

· ASTM D7994-25

· GB/T 40111-2021

· IEC 62321-3-2:2020

3. Instrument:SDXNS200H

Working Principle: The sample is combusted and hydrolyzed in the combustion unit. 
The combustion and hydrolysis products are condensed by water vapor, absorbed 
and carried into the absorption unit with the gas, then diluted to a constant volume, 
and subsequently introduced into the ion chromatograph for quantitative analysis of 
fluorine, chlorine, bromine, iodine, sulfur and other elements.

Working Principle Diagram

4. Instrument Conditions

l Sample injection volume: 50 μL

l Combustion Furnace Test Conditions:Test temperature: 1100 ℃

l Water vapor flow rate: 0.1 mL/min

l O₂ flow rate: 450 mL/min

l Ar flow rate: 150 mL/min

l Ar flow rate for water vapor purging: 60 mL/min

5. Combustion process

6. IC conditions

l Analytical column: AS-19 2×250 mm

l Guard column: AG-19 2×50 mm

l Eluent source: EGC KOH (S/N: 230921904017)

l Eluent concentration: 13 mM

l Flow rate: 0.25 mL/min

l Column temperature: 35 ℃

l Sample loop: 400 μL

l Detector: Suppressed conductivity detector, SDRS 600

l Linear range: 0.005–1 mg/L

7. Test Result