Total Chloride, Total Chlorine or Total Halogens, stand for the sum parameter of organic as well as inorganic Fluorine (F), Chlorine, (Cl), Bromine (Br) and Iodine (I). Trace levels of Total Chloride are measured with an elemental combustion analyzer according to Microcoulometric detection technique / Microcoulometry.
In the petrochemical industry, Total Chloride and Total Chlorine are used interchangeably.
In the environmental monitoring industry, the sum parameter is expressed as Total Halogens.
All these terms have the same defintion and are abbreviated as TX.
Applications where the amount of Total Chloride is examined:
• Organic Chlorides will form hydrochloric acid, this formation needs to be avoided to minimize corrosion in piping and equipment used during refining processes in the Oil & Gas industry.
• During the production process of High Purity Solvents like Iso-octane, Benzene, Hexane and Methanol, expensive catalyst material is used. The catalyst material is affected by Chloride which is present in High Purity Solvents.
• Skydrol is a fire resistant hydraulic aviation fluid used in airplanes of for example Boeing and Airbus. The amount of Total Chloride in Skydrol is measured because it is corrosive to the hydraulic system components. One of the common liquid contaminants are chlorinated cleaning solvents. Liquid contaminants can alter the fluid’s fire resistant properties, affect seal performance, cause gel formation and lead to acid development.
• PET Bottles are widely used all over the world. The base Polymer PET may contain contaminants like the toxic PVC. In a quality control test the total amount of Chloride provides an indication of the contamination level.
International methods to measure the amount of Total Chloride at trace level: ASTM D4929, ASTM D5808, UOP 779, ASTM D5194, ASTM D7457, GB/T 18612, SH/T 0253