A Test Method for the Chlorine Content of Phosphate Ester Fire-Resistant Oils by Energy-Dispersive X-Ray Fluorescence Spectrometry

Abstract

The concentration of the chlorine in phosphate ester fire-resistant oils needs to be controlled strictly, because it is crucially related to the corrosion of debug system and it is considered as an important indicator to find the hidden faults. It is confirmed that the chlorine content can be tested accurately and conveniently using energy dispersive X-ray fluorescence (EDXRF) spectrometry, due to many advantageous features of this method, namely, rapid response, high sensitivity and good measure precision. The preparation of standard samples and the optimization of analytical conditions are discussed in this paper; then a series of experiments is performed to verify the accuracy of this method. Test results of the samples with chlorine content more than 10mg•kg -1 show that the precision of the proposed measurement method is above 89%, and its repeatability is above 97%. This work not only can provide a feasible method for the rapid detection of chlorine content in phosphate ester fire-resistant oils, but also gives a promising application in power industry. 1