A method for detecting chlorine, phosphorus and potassium content in compound fertilizer products by energy dispersive x-ray fluorescence spectroscopy

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 in particular relates to a rapid determination method for the content of chlorine, phosphorus and potassium in different types of compound fertilizer products, in particular, a hand-held energy dispersive X-ray fluorescence spectrometer is used to detect chlorine, phosphorus and potassium in compound fertilizer products. A method for detecting the content of phosphorus and potassium. Background technique

[0002] As the main means of production of modern agriculture, chemical fertilizer is the basic industry of national economy. Entering the new century, my country's chemical fertilizer industry has entered a period of rapid development and has made important contributions to the increase in grain production for eight consecutive years. Chemical fertilizers are generally divided into nitrogen fertilizers, phosphorus fertilizers, potash fertilizers and compound fertilize...

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