Rapid X-ray fluorescence analysis of intercalation compounds for molybdenum content

Abstract

Expansion of the works on the synthesis and study of the structure of new intercalation compounds based on molybdenum disulfide (MD)with various organic molecules inclusions in the layered structures, entails the necessity of developing methods for rapid analysis of those compounds for molybdenum content. We developed a rapid method of RF analysis of such compounds using in bulk method in the range of 28 – 50% Mo content. Analytical signals were measured for MoKα line on a VRA-30 spectrometer («Karl Zeiss», Jena Germany, X-ray tube with Rh-anode operated in the mode of 35 kV, 15 mA). The molybdenum content is calculated using the derived constraint equation, the error of determination is ±2.5% Mo (abs.). In contrast to the traditional methods of external standard method with dilution used in the laboratory practice, the proposed method provides a satisfactory accuracy and reduces the duration of analysis from ~100 to ~20 min, the sample material being kept safe for further studies. Correctness of the method was confirmed for the batch of compounds by comparison of the obtained results and the data of XRF analysis with the dilution procedure.