Determination of Heavy Metal Oxide in Cement by X-Ray Fluorescence Spectrometer

Abstract

When the MLD method is used to determine the main chemical composition in the cement, it is assumed that the sum of the measured chemical composition is 100%. When the trace amount of heavy metal oxide is present in the cement sample without measuring, a positive error will be caused for main chemical composition results. On the other hand, according to the national standards GB/T 30760-2014 "technical specification for coprocessing of solid waste in cement kiln", also need to determine the heavy metals in cement. In this work, vanadium pentoxide, chromium oxide, copper oxide, zinc oxide, strontium oxide and barium oxide were measured by using melt beads for the determination of the main chemical components in cement. The calibration sample was calibrated using the standard addition – fusion method, using the theoretical MLD coefficient to calculate the standard dilution ratio. The method has been applied to the determination of heavy metal oxides in cement samples and achieved good results.

An Efficient Palladium-Thiourea Catalysed Heck Cross-Coupling Reaction for Molecular Electronic Interest

“…It has been developed into a single operational method of a wide scope for the construction of C-C bond forming processes in the preparation of multifunctional derivatives towards the synthesis of electron-deficient alkynes [1][2], styrene [3][4], and stilbene derivatives [5] with numerous technology applications, which include natural products bioactive compounds, and active pharmaceutical drugs intermediate [6]. Recently, researchers are giving more attention regarding cross-coupling reaction due to its ability in the formation of C-C bonds with excellent yield.…”