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Method for measuring content of glyphosate isopropylamine salt by utilizing infrared attenuate total reflection spectrometry

A glyphosate isopropylamine salt and infrared attenuation technology, which is applied in the field of spectral analysis, can solve the problems of application limitations, unpopular testing instruments, and high operating conditions, and achieve the effects of strong specificity, good linear relationship, and good repeatability

Inactive Publication Date: 2011-09-14
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although ion chromatography and nuclear magnetic resonance can directly detect the content of glyphosate isopropylamine salt, the testing instruments are not popular and the operating conditions are relatively high, so the application is limited

Method used

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  • Method for measuring content of glyphosate isopropylamine salt by utilizing infrared attenuate total reflection spectrometry
  • Method for measuring content of glyphosate isopropylamine salt by utilizing infrared attenuate total reflection spectrometry
  • Method for measuring content of glyphosate isopropylamine salt by utilizing infrared attenuate total reflection spectrometry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The content of glyphosate isopropylamine salt was determined by infrared attenuated total reflectance spectroscopy. The instrument used was the portable infrared spectrometer ALPHA-E produced by Bruker Company, and the ATR crystal was ZnSe.

[0042] Quantitative methods include the following steps:

[0043] 1. Set the infrared detection condition to scan range 4000-650cm -1 , scan times 32 times, resolution: 4cm -1 .

[0044] 2. Standard curve drawing

[0045] Six standard samples of glyphosate isopropylamine salt were precisely prepared, and their mass percentage concentrations were: 25.3%, 27.3%, 38.96%, 40.01%, 42.09% and 51.61%. The sample is dropped on the ATR crystal, the liquid completely covers the surface of the crystal, and the infrared attenuated total reflection spectrum of the standard sample is collected respectively ( figure 1), call the quantitative software in the OPUS software, and make a standard curve ( figure 2 ) and the linear regression equa...

Embodiment 2

[0051] According to the same method as in Implementation 1, the glyphosate isopropylamine salt sample of a certain pesticide factory was actually measured by infrared attenuated total reflection spectroscopy, and the instruments used, detection conditions, and standard curve were the same as in Example 1.

[0052] For the ATR infrared spectrum of the sample, see Figure 4 , The results of the three determinations showed that the content of glyphosate isopropylamine salt was 39.64%, 39.58%, 39.62%, and the average value was 39.61%.

Embodiment 3

[0054] According to the same method as implementation 1, the ultra-concentrated glyphosate isopropylamine salt sample of Roundup Company was actually measured by infrared attenuated total reflectance spectroscopy, and the instruments used, detection conditions, and standard curve were the same as in Example 1.

[0055] The ATR infrared spectrum data of the sample was collected and analyzed quantitatively according to the standard curve. The results of the three determinations showed that the content of glyphosate isopropylamine salt was 51.73%, 52.22%, 51.76%, and the average value was 51.90%.

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Abstract

The invention discloses a method for measuring the content of glyphosate isopropylamine salt by utilizing an infrared attenuate total reflection spectrometry, which is characterized by comprising the following steps: placing a glyphosate isopropylamine salt aqueous solution on ATR (attenuated total reflectance) crystals; collecting the infrared attenuate total reflection spectrum of the glyphosate isopropylamine salt aqueous solution; using the absorption peak in the position 1321cm-1 as a characteristic peak; and measuring the content of the glyphosate isopropylamine salt by adopting a standard curve method according to the peak area value. The method disclosed by the invention can be rapid, simple and convenient to quantitatively analyze the content of the glyphosate isopropylamine salt, does not need to carry out the preprocessing such as derivatization and the like and has the advantages of wide detection linear range and accurate and reliable result.

Description

technical field [0001] The invention relates to a spectral analysis method, in particular to a method for quantitatively analyzing the content of pesticide glyphosate isopropylamine salt by infrared attenuated total reflection (ATR) spectroscopy. Background technique [0002] Glyphosate is a foliar spray, systemic herbicide, white solid. It is a broad-spectrum, high-efficiency, low-toxicity, low-residue herbicide. This product has become one of the main varieties of pesticides in the late last century and is widely used in the world. [0003] The solubility of glyphosate in water at 25°C is 12g / L, but its sodium salt, potassium salt, ammonium salt and isopropylamine salt have good solubility in water. Therefore, glyphosate is often sold and used in the form of an aqueous solution of its amine salt. Therefore, it is very important to detect the content of ammonium glyphosate for product quality control. [0004] [0005] glyphosate [0006] [0007] Glyphosate isopr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25
Inventor 姚杰姚云朱兴元徐磊朱伟成张小俊
Owner NANJING NORMAL UNIVERSITY
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