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Taisifeng (Shanghai) Environmental Protection Technology Co., Ltd
Standardized laboratory management knowledge
Date: 2025-05-30Read: 9
01 Basic requirements for standardized laboratory management
1. Establish a strict laboratory management system, clarify responsibilities and requirements, and prevent operators from violating regulations
2. Keep the laboratory environment clean, pay attention to operational details, and avoid contamination caused by operator errors. Regularly clean the laboratory and its equipment, strictly prohibit sweeping with brooms, try not to use electric fans, and avoid dust and excessive humidity;
3. Staff entering the operating room should change into new clothes, hats, and shoes. It is strictly prohibited to bring items unrelated to the experiment into the laboratory to avoid contamination and affect experimental operations;
4. Projects that cause cross contamination or interference must be carried out in separate rooms;
5. A system should be established to prohibit unauthorized entry into areas with control requirements and to prohibit unrelated personnel from entering or leaving the laboratory at will
6. The countertops and items of different projects are not allowed to be mixed, and experimental operations that must be conducted in a fume hood should be strictly followed.
02 Laboratory Environment Requirements
1. The laboratory layout is reasonable, convenient for work, and there is no interference or cross contamination between the surrounding environment and testing projects. The determination of ammonia nitrogen and total hardness in water quality cannot be carried out in the same laboratory, as the use of ammonia water during total hardness determination will increase the measured value of ammonia nitrogen;
2. Testing places with strict requirements for temperature and humidity (such as precision instrument rooms) must be equipped with corresponding facilities and monitoring equipment, and the environmental conditions during testing must be recorded;
3. When environmental factors such as electromagnetic interference, noise, or vibration affect the detection work, specialized monitoring measures should be taken and relevant measured parameters should be recorded; For testing projects that require vibration and are prone to generating significant vibrations, vibration isolation and isolation measures should be taken;
4. Separate the experimental area from the office area appropriately, and restrict and control access to areas that may affect work quality;
5. Have good internal management to keep the laboratory clean, tidy, bright, and quiet;
6. Hazardous substances such as wastewater, exhaust gas, and other elements generated in the laboratory should be treated in accordance with environmental protection requirements;
7. A waiting area, a testing area, a finished area, and a sample retention area should be designated between samples, and special areas should be clearly marked;
8. There should be an independent pure water preparation room.
03 Laboratory item and reagent management
1. The management of laboratory items is divided into three categories: in use, scrapped, and idle, and is arranged in an orderly and tidy manner. Items unrelated to testing are all removed from the laboratory;
2. Glass measuring instruments should be numbered and not mixed with chemical reagents to avoid cross contamination;
3. Storage and management requirements for general reagents
Chemical reagents should be stored in dedicated warehouses The laboratory only stores a small amount of reagents required for short-term work, and should be stored separately from the prepared reagent solutions in a cabinet
The dedicated reagent cabinet should facilitate the separation and storage of reagents, and the reagents inside the cabinet should be placed in compartments according to their properties. Solid reagents and liquid reagents should be stored separately in the cabinet;
Reagents that are prone to contaminating other reagents should be tightly sealed and stored separately from other reagents; Reagents that are prone to gas production should not be packaged too tightly and should be placed in a well ventilated area; Bottles containing corrosive reagents should be supported by plastic or enamel plates to prevent accidental rupture and to accommodate all reagents; Reagents that are easily deliquescent or deteriorate due to moisture should be stored in a dryer; Special attention should be paid to refrigeration for volatile reagents; For reagents that can cause liquids to turn into solids when the room temperature drops (such as fuming sulfuric acid, phenol, glacial acetic acid, etc.), anti bottle cracking measures should be taken.
There should be a dedicated person responsible for regular inspections and timely handling of various abnormal situations.
4. Storage management of hazardous reagents
Dangerous reagents mainly refer to five categories of substances: flammable, explosive, toxic, corrosive, and radioactive. For their storage and management, in addition to meeting the requirements for general reagents, attention should also be paid to:
Flammable and explosive reagents should be stored separately according to their different physical and chemical properties. The indoor temperature should be below 30 ℃, and smoking, explosion, and sun exposure are strictly prohibited. The storage capacity of the experimental cabinet should be kept at the lowest level based on the principle of not affecting normal work and ensuring safety;
Volatile and flammable liquids should be sealed in bottles Highly toxic substances must be stored in a dedicated safe Strict management of requisition and implementation of dual lock management for two people;
Regarding radioactive substances It should be stored in a dedicated warehouse equipped with necessary shielding facilities and measuring devices And strict management systems should be established.
5. Storage management of test solution
Control the storage period of the test solution. The test solution should not be stored for a long time. The appropriate storage period should be determined based on the properties of the reagent and the concentration of the test solution. All test solutions should be labeled with standardized labels, including name, solvent, concentration, preparer, preparation date, and expiration date;
Correctly select the test solution container. The corrosion resistance of the container should meet the requirements, and the correct selection of the test solution container should be based on the properties of the test solution and the material characteristics of the container to prevent contamination of the test solution by certain impurities dissolved from the container. The sealing of the container should effectively prevent the invasion of gaseous impurities and the volatilization of the test solution.
Pay attention to special requirements for the test solution. Some test solutions have poor stability and are prone to deterioration when exposed to sunlight. Special storage methods should be used, such as avoiding light, refrigeration, and adding stabilizers;
Pay attention to the anti light, anti heat, and anti dust properties of the test solution to avoid contamination and concentration changes
Regularly check the quality of the test solution. If any signs of deterioration or contamination such as discoloration, precipitation, decomposition, etc. are found, they should be immediately discarded and reconstituted to avoid confusion and misuse
04 Laboratory Safety Measures
1. The laboratory must be equipped with safety facilities such as fume hoods, dust covers, exhaust pipes, and fire-fighting equipment, and regular inspections must be conducted to ensure that they are ready for use at any time;
2. When using electricity, gas, water, and fire in the laboratory, relevant rules should be followed to ensure safety
3. High pressure gas cylinders should be classified and stored properly, away from sources of fire and heat, avoid exposure to sunlight and strong vibrations, and fixed. It is best to isolate and place them;
4. When using highly toxic chemicals, the user shall submit an application and, after approval, handle the application procedures in accordance with regulations; The use of pre prepared standard solutions of highly toxic chemicals should be tracked and detailed records of receipt should be kept;
5. The use of organic solvents and operations with high volatility should be carried out in a fume hood or well ventilated area. Under no circumstances should open flames be used to directly heat organic solvents;
6. High chloric acid vapor is prone to intense reactions with organic matter, and even produces strong explosions. Its heating operation should be carried out in a dedicated fume hood
7. Radioactive materials should be stored in specialized warehouses equipped with necessary shielding facilities and measuring devices, and strict management systems should be established.
05 Laboratory Environmental Protection Requirements
1. Professional technical departments that generate radiation and hazardous chemicals should independently equip laboratories and take corresponding protective measures;
2. Treat harmful substances such as wastewater, exhaust gas, and other elements discharged from the laboratory to meet environmental protection requirements. Take effective measures to handle the "three wastes" generated in the laboratory:
Organic solvent waste liquids that are immiscible with each other should be centrally recovered and treated to prevent combustion or explosion accidents;
Potassium (sodium) cyanide waste liquid should be adjusted to a slightly alkaline state, and then bleach solution should be added to decompose it;
Benzo (a) pyrene and benzidine carcinogens can be mixed into fuel and incinerated in an incinerator;
Mercury, cadmium, lead, chromium and other heavy metals, as well as arsenic and other reagents, should be configured as needed to avoid unnecessary disposal and environmental pollution;
For discarded test samples, excess toxic test solutions, etc., specialized collection vessels should be set up for unified collection and centralized processing.
3. Testers and external personnel approved to enter the laboratory should wear work clothes and shoes when entering the testing area.