Method for detecting content of chlorine, phosphorus and potassium in compound and mixed fertilizer product by energy dispersion X-ray fluorescence spectrum

Abstract

The invention discloses a method for detecting the content of chlorine, phosphorus and potassium in a compound and mixed fertilizer product by an energy dispersion X-ray fluorescence spectrum. The method comprises the following steps: 1) selecting the compound and mixed fertilizer product composed of components with different types and content as a calibration sample and accurately determining thecontent of the chlorine, the phosphorus and the potassium in the calibration sample; 2) testing the compound and mixed fertilizer calibration sample with the known content of the chlorine, the phosphorus and the potassium by adopting an energy dispersion type X-ray fluorescence spectrograph and determining testing conditions of chlorine, phosphorus and potassium elements; 3) testing a compound and mixed fertilizer sample to be tested by adopting the energy dispersion type X-ray fluorescence spectrograph and obtaining the content of the chlorine, the phosphorus and the potassium in the compound and mixed fertilizer sample to be tested according to X-ray fluorescence spectrum intensity and a relation of the content of the chlorine, phosphorus and potassium elements in a calibration workingcurve constructed in step 2), so as to obtain the content of the chlorine, the phosphorus and the potassium in the compound and mixed fertilizer sample to be tested. According to the method disclosedby the invention, the content of the chlorine, the phosphorus and the potassium in products including the compound and mixed fertilizer, compound fertilizer, blended fertilizer and the like can be rapidly determined; the dosage of chemical reagents is reduced and a detection process is convenient and rapid; a detection result is accurate and has good consistency.

Description

Technical field [0001] The invention belongs to the technical field of compound fertilizer detection, and specifically relates to a rapid determination method for the content of chlorine, phosphorus, and potassium in different types of compound fertilizer products. In particular, a handheld energy dispersive X-ray fluorescence spectrometer is used to measure the chlorine, Method for detecting the content of phosphorus and potassium. Background technique [0002] As the main production material of modern agriculture, chemical fertilizer is a basic industry of the national economy. In the new century, my country's chemical fertilizer industry has entered a period of rapid development, and has made important contributions to my country's eight consecutive years of increasing grain production. Chemical fertilizers are generally divided into nitrogen fertilizers, phosphate fertilizers, potash fertilizers and compound fertilizers. At present, the main product category is compound fert...

AI Technical Summary

Problems solved by technology

[0003] In recent years, there have been many studies on the determination of the content and composition of chemical elements in products such as minerals and steel by X-ray fluorescence spectroscopy. This type of method mainly uses solid methods to determine its chemical composition. The main problems faced by this type of method are serious matrix interference, The particle size effect is obvious and the universality of the method is poor. Relevant research work solves the above problems and carries out technical improvement. For example, the determination of the chemical composition of steel is usually classified according to the chemical composition of the steel, and different types of products are constructed separately. Calibration curve , reduce the matrix interference with large differences in chemical element content, and improve the accuracy and precision of detection; the problems faced by the detection of minerals are more complicated, and researchers construct calibration curves by selecting different types of minerals to reduce matrix interference. However, the particle effect of the sample still has a serious impact on the results, so this method is usually used as a semi-quantitative method to determine the chemical composition of minerals.

The most critical thing is that the required standard sample system is very complex, and the universality of the standard sample is poor, which seriously affects the popularization and use of this type of method.

[0004] There is no literature report on the method of using energy dispersive X-ray fluorescence technology to detect the content of chlorine, phosphorus and potassium in compound fertilizer products.

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