XRF fluorescence spectrometer for the determination of ternary catalytic platinum, palladium and rhodium content in exhaust gas catalysts

EDX9000B energy dispersion spectrometer

XRF fluorescence spectrometer for the determination of ternary catalytic platinum, palladium and rhodium content in exhaust gas catalysts

Most instrumental analyses are solution samples, which need to be pre-treated and prepared into solution prior to the determination of precious metal content. Before the determination of platinum, palladium and rhodium content in waste automobile exhaust catalyst, 铂, palladium and rhodium need to be separated from the catalyst and then determined. The methods of separating and enriching precious metals include fire assay method, acid dissolution method, ETC. Due to the high temperature produced in the process of automobile use, the precious metals in the automobile tail gas catalyst will form precious metal oxides, and also denatured alumina. The acid dissolution method is used to leach platinum, 钯, rhodium in the catalyst, the leaching effect is not good; 然而, fire assay method can be a good way to overcome such defects, it with the aid of solid reagents and sample mixed, in the crucible heating melting, the resulting molten metal, alloy or matte at high temperature extraction of precious metals in the sample, the formation of alloys containing precious metals (那是, the test buckle), can trap various forms of precious metals, so as to meet the needs of high-precision trapping precious metals. 现在, the more common in the existing technology is to use lead assay or nickel sulfide assay to enrich platinum palladium rhodium precious metals, however, lead assay due to the existence of a large number of silicon and aluminum in the catalyst, in the enrichment of platinum palladium rhodium need to add gold or silver as a protective agent to form gold or silver alloy and a large number of silicon and aluminum separation, the processing process is complex, high cost; Nickel sulfide test in the dissolution buckle, due to the nickel sulfide buckle contains a large number of metal sulfides, the need for further dissolution separation with hydrochloric acid, the base metal into the solution, most of the precious metals are not dissolved, left in the residue, and a small amount of precious metals into the solution, resulting in the loss of precious metals, the accuracy of the determination results is not high.

Compared with traditional chemical analysis methods, XRF has the advantages of high test accuracy, no need to dissolve and destroy the sample, fast test speed and easy operation. EDX9000B is equipped with the most advanced SDD detector and high power optical tube, fully 1 can meet the customer’s determination of platinum, palladium and rhodium content in waste automobile exhaust catalyst.