Description
The system conforms to the following testing methods for chlorine testing:
- ASTM D5808-03 Microcoulometer for the Determination of Organochlorine in Aromatic Hydrocarbons and Related Compounds
- ASTM D5808-09a Standard Test Method for Determination of Chlorine in Aromatic Hydrocarbons and Related Chemicals by Microcoulometric Analysis
- ASTM D4929-06 Test Method for Determination of Organic Chlorine Content in Crude Oils
- ASTM D5194-06 Traces in Liquid Aromatic Hydrocarbons Chloride test method
- UOP779-08 Chloride in Petroluem Distillates by Microcoulometry
- SY/T7508-1997 Determination of total sulfur in liquefied petroluem gas in oil and gas fields – Oxidation microcoulometric method
- SH/T1757-2006 Determination of organochlorine in industrial aromatic hydrocarbons Microcoulomb method
- GB/T18612-2001 Determination of Organic Chlorine Content
- Test method for total chlorine content in Appendix B of GB23971-2009
Measuring Principle
When a sample containing Chlorine is combusted at a high temperature around 1000oC, Hydrogen Chloride is formed (HX), as illustrated in the equation below.
R-Cl + O2 –> HCl + CO2 H20
In the titration cell, when the system is in the equilibrium state, the Ag+ ions are at a constant concentration. After combustion, the carrier gas (Argon or N2) will move the chloride ions into the titration cell. This chloride ions will react with silver ions as illustrated below.
Ag+ + Cl- –> AgCl
The amount of charge used to regenerate the lost silver ions, is directly related to the total chloride present in the sample. The amount of current compensated during the electrolysis can be measured, and the total chlorine content in the sample can be obtained according to Faraday’s law of electrolysis.
The equations for this reaction are:
HX + Ag+ –> H+ + AgX
Ag –> Ag+ + e
Features & Characteristics
- Micro-coulometry technology. Equipped with Advanced Software for parameter setting, data acquisition and data processing. Software runs on latest Windows OS and it is easy to operate.
- Standard Model comes with Chlorine capability. It can be used to analyze Sulfur (coulometric method) by addition of platinum electrode (optional)
- Wide application scope and with good adaptation capability. It can be used to determine the sulfur or chlorine in liquid, gas or solid materials,. Selected accessory is needed for different sample type.
- Intuititve and user-friendly software. It will perform straightforward analysis parameter setting, data collection, processing, saving and printing automatically.
- It needs less sample. Only 10uL for each test. The testing time is short. Analysis is completed in less than 3 minutes for each sample.
- Absolute titration method. No need to calibrate (there is a possible to calibrate if you wish)
