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Infrared spectrum fast detection method for isotope abundance of 15N tracer urea

A technology of isotope abundance and infrared spectroscopy, which is applied in the field of infrared spectroscopy rapid detection of 15N tracer urea isotope abundance, can solve the problems of high cost of measurement, long detection cycle of sampling number, time-consuming analysis and testing, etc., and achieve good economic benefits , Fast scanning speed, easy to use effect

Active Publication Date: 2011-11-02
ZHEJIANG UNIV
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Problems solved by technology

At the same time, infrared spectroscopy can effectively overcome the traditional 15 The N isotope analysis method is expensive to measure, time-consuming to analyze and test, the number of samples is too small, and the detection cycle is long.

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  • Infrared spectrum fast detection method for isotope abundance of 15N tracer urea
  • Infrared spectrum fast detection method for isotope abundance of 15N tracer urea
  • Infrared spectrum fast detection method for isotope abundance of 15N tracer urea

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] Such as figure 1 Shown, the inventive method specifically comprises the following steps:

[0025] ① 15 Sample preparation for N tracer urea. Bundle 15 Put N tracer urea into an agate mortar, fully grind it into a powder with a particle size of less than 20 μm under the irradiation of an infrared lamp, weigh 0.01 g of a powder sample and grind and mix it with 0.1-0.049 g of dry potassium bromide powder, and grind it with a steel shovel The finely mixed powder is moved into the tableting mold, and the tableting mold is placed horizontally on the tablet machine base, and 10t / cm 2 Press the mold to obtain a sample sheet.

[0026] ②Spectrum acquisition of samples. Fix the prepared sample sheet on the bracket and put it into the sample chamber of the infrared spectrometer. The spectral collection range of the infrared spectrometer is 4000 cm -1 ~400cm -1 , with a ...

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Abstract

The invention relates to an infrared spectrum fast detection method for the isotope abundance of 15N tracer urea. The conventional detection method is low in speed and is complicatedly operated. The method comprises the following steps of: grinding 15N tracer urea to be detected into a powder sample; tabletting the powder sample and potassium bromide to obtain a sample; performing infrared transmission spectrum scanning on the prepared sample to obtain a transmission spectrum of the sample; converting the transmission spectrum of the sample into an absorbance spectrum; and substituting the absorbance of the sample of which the wave numbers are detected at the positions of 3,411cm<-1>, 3,175cm<-1>, 1,697cm<-1>,1,656cm<-1>, 1,628cm<-1>, 1,601cm<-1>, 1,478cm<-1> and 1,442cm<-1> into a formula to acquire the isotope abundance Y of the sample. The method is convenient to use; and the isotope abundance of the 15N tracer urea can be fast and effectively measured, so that the method has a good economic benefit.

Description

technical field [0001] The invention belongs to the technical field of information detection and relates to a 15 Infrared Spectroscopy Rapid Detection Method for N Tracer Urea Isotope Abundance. Background technique [0002] Nitrogen is an essential nutrient element for plants and the first of the three elements of crop fertilization. Nitrogen fertilizer accounts for about 60% of my country's chemical fertilizer consumption. At present, my country's 7% of the world's arable land consumes 35% of the world's nitrogen fertilizer, and the excessive application of nitrogen fertilizer has brought great harm to my country's agricultural production and ecological environment. Every year, nearly 10 million tons of nitrogen are lost due to unreasonable fertilization in China, and the direct economic loss is about 30 billion yuan. Moreover, due to the low utilization rate of nitrogen fertilizer, about 60% enters the environment. Therefore, excessive nitrogen application has become a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N1/28G01N1/32G01N1/38G01N21/3563
Inventor 李晓丽何勇聂鹏程
Owner ZHEJIANG UNIV
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