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Ultra-micro spectrophotometer itself is a very important type of analytical instrument, whether it is in scientific research fields such as physics, chemistry, biology, medicine, materials science, and environmental science, or in modern products such as chemical engineering, medicine, environmental testing, and metallurgy. It has very important applications with management departments.

After entering the environment, microplastics are difficult to be degraded, and their half-life in the environment lasts for hundreds of years, causing great harm to the natural environment and ecosystem, and possibly threatening human beings through the food chain. 

This paper is mainly based on the chemical characterization of microplastics detection technology summary, for the future research to provide ideas.

GA500 adopts advanced rare-earth fluorescence technology, can easily generate hairs within 10 minutes of morphine, methamphetamine (commonly known as crystal meth) and ketamine (commonly known as K) three common drugs, and methcathinone, benzodiazepine and cocaine, quickly and accurately test result meet the demand of qualitative quaThe pain points of drug detection in the public security anti-drugs

• The suspect resisted strongly and was unable to obtain blood or urine;
• Drugs are detected through blood and urine, which can interfere with drugs;
• Difficulty in sample preservation;
• The metabolism of blood and urine is fast, and it cannot be detected 5-10 days after taking drugs. 

Background

  In order to solve the various shortcomings of the current public security anti-drug police in the urine and saliva testing methods for drug addicts. According to this requirement, Optosky has developed the GA500 Handheld Hair Trace Drugs Analyzer. At present, the product has obtained a product inspection report issued by the Ministry of Public Security's Safety and Police Electronic Product Quality Inspection Center, and the hair drug detection system has obtained software copyright, software products and scientific and technological novelty reports issued by provincial science and technology departments.

Function of hair drug identification：

• Determine the type of drug: fluorescence reaction of different substances, determine the type of drug contained in the hair
• Judging the time of drug abuse: According to the length of the collected hair and the sampling location, the identification conclusion of whether the hair contains drug ingredients and the time period of drug abuse behavior is issued.
• Determining the amount of drug abuse: to indicate the extent of drug abuse.
• Determining the number of drug abuse: to determine single-drug and long-term treatment.

Advantages of hair drug identification：

• High accuracy: Rare earth luminescence technology is currently the emerging and most accurate immunoassay rapid test technology.
• Fast detection: The detection of drug content in hair samples of suspicious persons can be quickly completed within 5-10 minutes.
• High sensitivity: The minimum drug content can be detected at 0.2ng/mg, which meets the industry standard requirements of the Anti-Drug Association.
• Convenient sampling: a little hair is enough (5mg), no privacy is involved, and adulteration is avoided.
• Convenient storage: hair can be stored at room temperature, while urine, blood and other test materials generally need to be stored at low temperature.
• Long traceability period: The hair can be used to detect whether the suspicious person contains drugs within 3-6 months.
• On-site testing: all the instruments, reagents and other accessories required for testing are packed in a testing box of about 20 inches luggagentitative analysis, at the same time the results and numerical printed.

Optosky ATP9100 is a new handheld hyperspectral field spectroradiometer that employs spectral range between 300-1100nm, and it's applied to fields of remote sensing measurement, crop monitoring, research of forest and oceanography etc.

From the application side, it is not excessive for silicon carbide to be called the "golden track". At present, for the two types of chips, silicon carbide and gallium nitride, if you want to maximize the characteristics of their materials, the ideal solution is carbonization. An epitaxial layer is grown on a silicon single crystal substrate. That is, the long silicon carbide epitaxial layer on silicon carbide is used to manufacture power devices; the long gallium nitride epitaxial layer on silicon carbide can be used to manufacture medium and low voltage high frequency power devices, high power microwave radio frequency devices and optoelectronic devices. Therefore, the silicon carbide substrate material can meet the demand for the substrate material of the two most potential materials at the moment, "one material has two uses", so this is the source of the saying that "the one who obtains silicon carbide has the world".