Method of using plasma transmission spectrograph to detect potassium oxide in compound fertilizer

A compound fertilizer and spectrometer technology, which is applied in the field of determination of potassium oxide in compound fertilizer by ion emission spectrometer, can solve problems such as interference in the determination, and achieve the effects of short time consumption, improved analysis efficiency and high sensitivity

Inactive Publication Date: 2017-01-25
贵州开磷质量检测中心有限责任公司
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Problems solved by technology

[0004] However, the detection of this method will be affected by the interference factors such as the concentration of the sample and other chromogenic metals in the compound fertilizer. Usually, it can only measure the content of potassium oxide in compound fertilizers with low concentration and high purity, such as in potassium phosphate compound fertilizers. , phosphate root will interfere with the determination of potassium. In chlorine-based and sulfur-based compound fertilizers, pH and nitrate will interfere with the determination of potassium. Therefore, chemical methods are usually used to pre-treat samples, which will bring The influence of other ions on the detection

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  • Method of using plasma transmission spectrograph to detect potassium oxide in compound fertilizer
  • Method of using plasma transmission spectrograph to detect potassium oxide in compound fertilizer

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[0027] In order to enable those skilled in the art to understand the method of the present invention more clearly, the applicant has further described it experimentally in specific embodiments.

[0028] A plasma emission spectrometer method for determining potassium oxide in compound fertilizers includes the following steps:

[0029] 1) Sample processing

[0030] Divide the sample to 40-60g with a shrinking device or quartering method, crush it with a universal crusher, and pass through a 0.4mm test sieve for analysis; the sample is made of monoammonium phosphate (diammonium phosphate), nitric acid Analytical sample prepared from chlorine-based compound fertilizer produced with ammonium and potassium chloride as raw materials, named as sample A; sulfur-based compound fertilizer produced with monoammonium phosphate (diammonium phosphate), ammonium nitrate, and potassium sulfate as raw materials The prepared analysis sample is named sample B; the analysis sample prepared from the comp...

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Abstract

The invention discloses a method for measuring potassium oxide in a compound fertilizer by a plasma emission spectrometer. The content of potassium oxide in the compound fertilizer is detected by a plasma emission spectrometer, and the detection is carried out through a suitable standard liquid configuration, a suitable standard curve and instrument parameters. . When this method is used, there is no need to add masking agent and precipitant, which reduces the filtration, drying and weighing process of precipitation, and is not affected by sample composition. It can detect the content of potassium oxide in high concentration and various compound fertilizers, and the detection accuracy is high. , good stability and high sensitivity. The method has the characteristics of simple operation process and short time consumption, which can greatly alleviate the labor intensity of personnel, shorten the analysis time, and improve the analysis efficiency.

Description

Technical field [0001] The invention relates to a method for measuring potassium oxide in a compound fertilizer by a plasma emission spectrometer, and belongs to the technical field of instrument analysis. Background technique [0002] As one of the essential nutrient elements for plant growth, potassium is an important indicator in the production of compound fertilizer. Therefore, it is of great significance to determine its content. The current methods for determining potassium usually include volumetric method, gravimetric method, potentiometric titration, flame photometry, atomic absorption spectrometry, ion selective electrode method, emission spectrometry, chromatography, X-ray diffraction, and neutron activation analysis. Sub-determination and so on. In the prior art, the potassium tetraphenylborate method is usually used to determine potassium in compound fertilizers. The sodium tetraphenylborate solution in the weakly alkaline solution and the potassium in the sample pr...

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Application Information

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IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 穆菊英陈剑李前陈修琼陈红美洪梅吴声玉王朝敏林莉
Owner 贵州开磷质量检测中心有限责任公司
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