Abstract: For the purpose of boiler corrosion prevention and environmental protection, it is very necessary to determine the Cl^- in the coal fuels. The procedures of conventional chemical analysis in the existing national standard method are quite complicate, with low efficiency and accuracy due to many influencing factors. Therefore, the measurement of Cl^- is studied using the energy dispersion X-ray fluorescence spectrum method(EDXRF). The result of antitheses tests on standard materials and methods show that by virtue of EDXRF method the chlorine can be determined fast with, high accuracy and high precision, which reveals its a promising prospect in applications.

Key words: coal, chlorine, determination, EDXRF