Method for identifying components of suspended matter in liquid

A suspension and liquid technology, applied in the analysis of materials, material analysis through optical means, measuring devices, etc., can solve the problems of high technical requirements for operators, long detection time, large sample volume, etc., and achieve simple and accurate operation procedures The effect of high precision and simplified detection steps

Pending Publication Date: 2020-04-24
上海康识食品科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a method for identifying suspended solids in liquids, which overcomes the defects of conventional detection methods in the prior art that require a large amount of samples, long detection time, and high technical requirements for operators.

Method used

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  • Method for identifying components of suspended matter in liquid
  • Method for identifying components of suspended matter in liquid
  • Method for identifying components of suspended matter in liquid

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0064] instrument:

[0065] Micro-infrared spectrometer Nicolet iN10 (Thermo Fisher), the detector is a photoconductive detector (MCT detector), and the acquisition wavenumber range is 4000-650cm -1 , resolution 4cm -1 , the number of scans is 32 times.

[0066] Scanning Electron Microscope-Energy Spectrometer (SEM-EDS) (FEI-EDAX)

[0067] sample:

[0068] A certain brand of bottled water contains suspended solids.

[0069] Identification method and result:

[0070] (1) Leave the bottled water containing suspended solids for 0.5 hours, absorb the suspended solids with a straw, and dry naturally to obtain a dry sample;

[0071] (2) Under the microscope, take a dry sample with a diameter of micron and place it on a KBr salt sheet, and use a micro-Fourier transform infrared spectrometer to focus the sample and collect the spectrum.

[0072] (3) Analyzing the collected infrared spectrum, the results are as follows image 3 As shown, the results show that 2800-3000cm in the ...

example 2

[0076] Instrument: Same as Example 1.

[0077] sample:

[0078] A certain brand of bottled water contains suspended solids.

[0079] Identification process and results:

[0080] (1) Let the bottled water containing the suspended matter stand for 1 hour, centrifuge to obtain the suspended matter, and dry it at a low temperature at 70° C. to obtain a dry sample.

[0081] (2) Under the microscope, take a dry sample with a diameter of micron and place it on a KBr salt sheet, and use a micro-Fourier transform infrared spectrometer to focus the sample and collect the spectrum.

[0082] (3) Analyzing the collected infrared spectrum, the results are as follows Figure 6 As shown, the results show that in the infrared spectrum at 2800-3000cm -1 There is no -C-H absorption peak, and no -C-F absorption peak. It is inferred that the main component of the suspended matter is inorganic components. SEM-EDS elemental analysis was carried out on dry samples, the results are as follows F...

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Abstract

The invention discloses a method for identifying components of a suspended matter in liquid. The method comprises the following steps: sampling the suspended matter from liquid to be detected to obtain a suspended matter sample to be detected; detecting the suspended matter sample to be detected by adopting infrared rays to obtain infrared spectrum data; preliminarily judging whether the suspendedmatter sample to be detected contains inorganic components and organic components or not according to whether a specific absorption peak is displayed in the infrared spectrum data or not; when the suspended matter sample contains inorganic components, detecting the suspended matter sample to be detected by adopting a scanning electron microscope-energy spectrometer; when the to-be-detected liquidcontains organic components, performing component qualitative analysis on suspended solids in the to-be-detected liquid, and performing microscopic examination if necessary; and obtaining a detectionresult. The method overcomes the defects of large sample amount, long detection time, high technical requirements on operators and the like in the existing method for detecting the suspended matter components in the liquid, can quickly identify the components of the suspended matter in the to-be-detected liquid for samples with high timeliness requirements, and is simple and convenient in operation.

Description

technical field [0001] The invention relates to the field of food analysis and detection, in particular to a method for identifying suspended matter components in liquids. Background technique [0002] Packaged drinking water has been quickly accepted and loved by people since it entered the market because of its portability, clean and healthy characteristics. With the continuous improvement of people's living standards, the quality requirements for packaged drinking water are also getting higher and higher. Food safety is the foundation of the survival of enterprises, and the quality of packaged drinking water, especially bottled water, is also the top priority of major enterprises. For enterprises, how to quickly and effectively identify them after quality abnormalities occur, and provide references for proposing solutions, so as to reduce the loss of enterprises is very important. [0003] In view of the characteristics of the production process of packaged drinking wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3577
CPCG01N21/3577
Inventor 张召艳孙洪峰范艳红方婷子罗之纲
Owner 上海康识食品科技有限公司
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