A magnetic resonance device and detection method for measuring oil pollution in water bodies

Abstract

The invention relates to a magnetic resonance device for measuring oil pollution in a water body and a detection method. An upper computer is connected with a helmholtz coil through a master program control power supply; the upper computer is connected with a transmitting coil through a master control unit, an emission control unit and an emission bridge circuit; the upper computer is connected with a receiving coil through a signal collection card, a signal processing unit and a switching switch; the emission coil is connected with the receiving coil through a resonant capacitor. The detection method comprises the following steps: constructing a database, putting a water sample to be detected into the receiving coil and the emission coil for measuring, then contrasting a measuring result with the database, and thus obtaining the measuring result. The greatest advantage lies in that the device is small in size and convenient to carry, the water sample to be detected does not need any pretreatment before detection, and the water sample can be directly put into the device for detection after site sampling, so that the device is time-saving, labor-saving, convenient, quick and simple in operation. A novel method is introduced in the pollution detection field of the water body, and meanwhile the application of a magnetic resonance method is also expanded.

Description

technical field [0001] The invention relates to a magnetic resonance device and a detection method for detecting oil pollution in a water body, in particular to a portable magnetic resonance device and a detection method for quickly measuring oil pollution in a water body on site. Background technique [0002] In the process of exploration, mining, transportation, refining, storage, processing and use of petroleum, it is inevitable that petroleum pollution will enter the natural environment such as soil, groundwater, surface water, ocean, etc., causing serious damage to the ecological environment and social environment. Certain hazards. It is usually necessary to collect polluted water samples and send them to the laboratory for testing. Current testing methods include turbidimetry, ultrasonic method, light scattering method, electrical resistance method, gravimetric method, colorimetric method, infrared spectrophotometry, ultraviolet spectrophotometry, and fluorescence spec...

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Problems solved by technology

[0003] These qualitative or quantitative detection methods have some problems that are difficult to solve effectively

Among them: the turbidity method, ultrasonic method, and light scattering method only work on dispersed oil, and cannot detect low-concentration petroleum hydrocarbon organic pollution dissolved in water; the sensitivity of the resistance method is not high enough, and the electrode is easily contaminated, resulting in inaccurate measurement results. The gravimetric method and the infrared spectrophotometric method need to extract the contaminated samples before detection, and the operation is cumbersome; the ultraviolet spectrophotometric method and the fluorescent spectrophotometric method are only sensitive to aromatic compounds and compounds containing conjugated double bonds, and cannot be used for other organic pollution. Accurate determination; gas chromatograph has complex structure, slow detection speed, high price and high cost

[0004] Chinese patent CN102937584A discloses "Ultraviolet Fluorescence Oil-in-Water Online Detector", which proposes a simple structure, ingenious design, small size, and portable UV Fluorescent Oil-in-Water On-line Detector. This invention avoids the need for traditional detection Bringing the sample back to the laboratory for use, and the large volume and heavy weight of the equipment is time-consuming and labor-intensive for UV fluorescence detection

However, as mentioned above, the ultraviolet fluorescence method uses the fluorescence effect of oil pollution for detection. For oil pollutants without fluorescence effect, it cannot be accurately measured

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