Portable soil multi-heavy metal element quick detector with sample automatic rotating function

Abstract

The invention relates to a portable soil multi-heavy metal element quick detector with a sample automatic rotating function. The portable soil multi-heavy metal element quick detector comprises a boxtype outer casing, a power source management system, an X-ray fluorescent exciting and detecting system, a sample pretreatment system, an industrial control touch screen computer and a sample automatic rotating system, wherein the sample pretreatment system comprises a soil drying device, a mortar and a compaction device; the industrial control touch screen computer with built-in quantitative analyzing software comprises an industrial control touch screen and a main control circuit board; the X-ray fluorescent exciting and detecting system comprises a miniature X-ray tube, light filters and adetector; at least three light filters are automatically switched by a multi-light filter switching system according to different detected elements; a sample cup for containing a sample treated by thesample pretreatment system is arranged in a sample cavity, and is rotated by the sample automatic rotating system, and each part of the detected surface of the sample is uniformly radiated and detected by X-ray. The portable soil multi-heavy metal element quick detector has the advantages that the size is small, the weight is light, the carrying is convenient, the operation is simple, the consumption of consumables is avoided, and the secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of detection of heavy metal elements, and in particular relates to a portable rapid detector of various heavy metal elements in soil with a sample spinning function, which can perform rapid, non-destructive and high-precision detection of various heavy metal elements in soil. Background technique [0002] With the release of the "Ten Soil Measures" issued by the Ministry of Environmental Protection, the demand for on-site rapid detection of soil heavy metals has become particularly urgent. Existing soil heavy metal detection technologies include inductively coupled plasma emission spectrometry, inductively coupled plasma mass spectrometry, electrochemical methods, laser Induced breakdown spectroscopy, handheld and benchtop XRF (X-ray fluorescence analysis), etc. [0003] The first three methods require time-consuming and labor-intensive pretreatment processes such as strong acid digestion of the sample. The ...

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Problems solved by technology

[0003] The first three methods require time-consuming and labor-intensive pretreatment processes such as strong acid digestion of the sample, and the measurement cycle is long, which is not conducive to on-site detection, and will cause secondary pollution

Although the laser-induced breakdown spectroscopy test method can directly detect soil samples, the detection limit of heavy metal elements is high and the accuracy is poor

Although the hand-held XRF method is portable enough and can perform non-destructive testing on soil samples, it cannot quantitatively detect heavy metal elements such as Cd due to factors such as excitation power, and the hand-held instrument does not have a spin mechanism, so the test results are not available when the sample is uneven. representative

The desktop XRF instrument equipped in the laboratory cannot meet the needs of on-site testing because of its lack of portability

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