Public security bureau system laboratory, mainly used for criminal investigation and investigation assistance, mostly for DNA identification laboratory, drug laboratory and PCR clean laboratory. Common public security bureau (criminal investigation) laboratories mainly include DNA, forensic material evidence, physics and chemistry, toxicity, trace test, document test and imaging technology and other professional laboratories.

Acceptance criteria
Public security bureau DNA laboratory decoration planning, acceptance standards mainly refer to the following standards: public security bureau criminal science and technology equipment allocation standard is the minimum standard "county and urban public security bureau criminal science and technology business construction standard" issued by the ministry of public security

Grade rating:
Methods for grading public security criminal science and technology rooms
Code for construction of DNA laboratory of forensic science
General requirements for laboratory biosafety gb19489-2004
Building technical code for biosafety laboratory gb50346-2004
Guidelines for biosafety applications in microbiology and biomedical laboratories ws233-2002
Code for construction and acceptance of clean rooms jgj71-1990
Code for construction and acceptance of ventilation and air conditioning engineering gb50243-2002

Ii. Planning standards
DAN laboratory of public security bureau is mainly engaged in individual identification and genetic identification.
The DNA laboratory is divided into four relatively independent areas: the DNA extraction area, the PCR amplification area, the detection area and the material preservation experimental data analysis and processing area, which is constructed according to the international and domestic standards of the ministry of public security. Strictly speaking, the whole area needs to be clean.
Generally in the 100,000 level to about 10,000 level, but at present most units in the construction of no concept of this aspect, only color steel plate do partition make it clean area. The floor is better with PVC, relatively durable, design and color also has choice skill, although ageing changes handy also. Some units also use epoxy resin floor, but not recommended, the floor is not wear-resistant, and not easy to maintain and update.Forensic science is a special science and technology industry, and its conclusion will provide evidence for the court, which is related to the protection of civil rights and judicial justice.
The forensic examination and identification center of public security bureau has the following services: forensic pathological damage, forensic material evidence, DNA, poisoning, trace material evidence, traces, criminal photography, fingerprints, bullets, documents, explosions and other examination and identification work.

Iii. Laboratory configuration
Basic requirements for the layout of the laboratory:
1. Single single-sided working space: aisles are spaced 4 feet apart, about 1200mm; The height of the object is 5 feet, about 1500mm; Operating clearance: 2.5 feet, about 750mm;
2. Double-sided working space: aisle spacing is 5 feet, about 1500mm; The height of the object is 5 feet, about 1500mm; Operating clearance: 2.5 feet, about 750mm;
3. The spacing between the laboratory bench and the safety equipment is 6 feet, about 1800mm;
4. Aisle spacing between safety equipment is >, 6 feet.

Iv. Basic requirements of the laboratory for itself
1. Lighting of the laboratory: generally speaking, the physical and chemical laboratory should be oriented to the southeast to facilitate lighting; An instrument shall be oriented to the northwest to facilitate constant temperature and humidity control;
2. Laboratory air conditioning: reasonable exhaust rate and air supplement rate are very important to the health of laboratory staff and the accuracy of experimental data; Laboratory chemistry organic synthesis toxicant R1 biomedical physics per hour 6-20 15-18 20-30 15-30 5-30 5-10 3-8
3. Laboratory water and electricity: a reasonable laboratory water and electricity layout system is an important basis for laboratory planning and design; Electricity, water, gas and other piping modes of the laboratory are very important in the design of the laboratory, which must be considered comprehensively according to the content of the laboratory and the building form (high-rise or bungalow), as well as the future expansion, safety, funding and functions. Through a lot of practice, we can provide the best piping system design and construction.
4. Size requirements of laboratory corridor and doors and Windows: corridor width should be >5 feet, door frame size (width * height) : 3 feet *7 feet (900mm*2000mm in China).

5. Summary
With the development of science and technology and the progress of The Times, the laboratory system plays an increasingly important role in the criminal investigation and investigation of public security bureau. The quality of the laboratory decoration design and planning directly affects the construction and the use of the laboratory.