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Method and device for rapid and high-precision detection of content of heavy metal lead in edible oil

A detection device and detection method technology, applied in the direction of material excitation analysis, etc., can solve the problems of insufficient detection accuracy of heavy metal lead content, etc., and achieve the effects of fast and high-precision detection, good sample stability, and high-precision detection

Active Publication Date: 2015-11-25
防城港澳加粮油工业有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of insufficient detection accuracy of the existing edible oil heavy metal lead content, provide a fast and high-precision detection method and device for the heavy metal lead content in edible oil, and improve the detection accuracy

Method used

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  • Method and device for rapid and high-precision detection of content of heavy metal lead in edible oil

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Embodiment

[0040] Embodiment: a kind of fast and high-precision detection device of heavy metal lead content in edible oil, such as figure 1 shown. This device comprises sample container 10, and edible oil sample 12 is housed in the sample container, and the inner bottom of sample container is provided with ultrasonic nebulizer 11, and the opening of sample container is connected quartz container 8 through connecting pipe 13, and quartz container is placed horizontally, and the quartz container The other opening is connected with a condensation pipe 17 . A microwave generator is attached to the bottom of the outer wall of the quartz container. The spectrometer is connected to the computer 6 through the data line, the spectrometer is connected to the fiber optic probe through the optical fiber 4, and the spectrometer is also connected to the laser 1 through the digital pulse delayer 3. The light source emitted by the laser is reflected by the reflector 16, and then passes through the con...

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Abstract

The invention discloses a method and device for rapid and high-precision detection of the content of a heavy metal lead in edible oil, and is used for solving the problem of insufficient accuracy of conventional detection of the edible oil heavy metal lead content. The device adopts an atomizer for atomizing an edible oil sample, and an LIBS spectrum signal of the sample is enhanced by a microwave assisted method. An LIBS spectrum of the sample is subjected to segmented correction by adopting the carbon element spectral line intensity, and then a background spectrum of the edible oil is removed. Seven wavelengths are selected as characteristic spectral lines of the heavy metal lead, multiple linear regression is applied to associate the spectral line intensity of the characteristic wavelengths with the real heavy metal content, and a calibration model of the heavy metal content in the edible oil is established and is subjected to temperature correction. The calibration model after temperature correction can perform rapid and high-precision detection of the heavy metal content in the to-be-measured edible oil sample under conditions of different environmental temperatures.

Description

technical field [0001] The invention belongs to the field of edible oil safety quality detection, and relates to a fast and high-precision detection method and device for heavy metal lead content in edible oil. Background technique [0002] Edible oil is a necessity in people's life, and excessive harmful heavy metal elements are one of the quality and safety problems of edible oil. Heavy metals are enriched and difficult to degrade after being ingested by the human body. They will gradually accumulate in the human body, and when they reach a certain concentration, they will cause great harm to the human body. Heavy metal lead can easily cause anemia, can directly damage human brain cells, especially the nervous system of the fetus, and can cause congenital mental retardation. For edible oil, the national standard GB2716-2005 stipulates that the total arsenic and lead content should not be higher than 0.1mg / kg. Therefore, in order to protect people's health, it is very nec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/63
Inventor 孙通刘木华李晓珍吴宜青
Owner 防城港澳加粮油工业有限公司
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