Method for rapid detection of waste oil based on laser-induced breakdown spectroscopy

A technology of laser-induced breakdown and spectroscopy, applied in the field of rapid detection of waste oil based on laser-induced breakdown spectroscopy, can solve the problems of long detection time, complicated instruments, limited sensitivity, etc., and achieve the effect of high speed and high sensitivity

Inactive Publication Date: 2012-06-27
DALIAN UNIV OF TECH
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Problems solved by technology

[0007] 2. Conductivity measurement method. Grease is a non-conductive substance. Experimental data show that the conductivity of hogwash oil is extremely high. The reason is that hogwash oil has added some easily ionized substances such as salt and monosodium glutamate during cooking. In addition, waste oil will interact with air, metal, moisture, microorganisms, etc. during the collection, refining, and processing processes, thereby increasing the conductivity of was

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  • Method for rapid detection of waste oil based on laser-induced breakdown spectroscopy
  • Method for rapid detection of waste oil based on laser-induced breakdown spectroscopy

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] Such as figure 1 As shown, in the method for rapid detection of waste oil based on laser-induced breakdown spectroscopy in this embodiment, the computer 1 issues instructions to control the laser ranging module 2 to measure the distance L between the laser 3 and the sample surface 14, and the working principle of the laser ranging module 2 To emit a beam with a wavelength of 532nm, the energy density of a single pulse is about 150mJ / cm 2 The laser, and the laser beam forms a certain angle (about 2 degrees) with the normal line of the oil sample liquid surface. When the laser beam reaches the surface of the oil sample, it is reflected, and the reflected laser pulse is input to the receiving end of the laser measurement module 2. The distance L from the output port of the laser 3 to the sample surface can be determined according to the received ...

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Abstract

The invention discloses a method for rapid detection of waste oil based on laser-induced breakdown spectroscopy. The method comprises the following steps that: step A, laser beams of a laser output system are focused on the surface of grease to be detected through lenses so as to allow the surface of the grease to be detected to form plasma plume and to glow; step B, laser-induced breakdown spectroscopic LIBS signals of the grease to be detected are transmitted to a spectrum measurement system through a signal collection system; step C, the spectrum measurement system compares measured spectroscopic data with laser-induced breakdown spectroscopic LIBS data of every element in a database, and information about varieties and contents of metal elements in the grease to be detected and analytical data of related information about contents of carbon, nitrogen, oxygen and compounds thereof are parsed according to spectral line positions and spectral line intensity; and step D, a computer system compares the analytical data with the data of a normal grease sample in the database so as to determine the quality of the detected grease sample.

Description

technical field [0001] The invention relates to the field of oil detection. The metal ion content in waste oil is much greater than that in edible oil, and the waste oil contains some metal ions that are not in edible oil. The invention particularly relates to a method for rapid detection of waste oil based on laser-induced breakdown spectroscopy. The invention mainly detects the content of metal ions, carbon, nitrogen, oxygen and their compound components in the oil by laser-induced breakdown spectroscopy technology and their correlation to identify the quality information of the oil. Background technique [0002] Edible oil is a necessity in people's daily life, and the quality of the oil is closely related to the health status of the public. Nowadays, driven by economic interests, some unscrupulous merchants use waste oil to produce gutter oil, and pretend to be edible oil to re-flow into the food market and sell it to consumers. This illegal behavior seriously endanger...

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Application Information

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IPC IPC(8): G01N21/63
CPCG01N21/718G01N2201/0638
Inventor 丁洪斌海然赵栋烨
Owner DALIAN UNIV OF TECH
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