Lab supplies for scientific research and production
The mini pipette gun is a kind of measuring tool that transfers liquid from the original container to another container within a certain range.
What are lab supplies?
Lab supplies are used for conducting controlled and precise tests, research, and experiments in laboratories. Labware, lab trays, and lab pans are used to transport, store, and hold material in the lab. Lab utensils and instruments are used to measure, mix, sort, handle, dispense, and analyze lab materials precisely and efficiently. Lab furniture and lab equipment such as scales, stands, centrifuges, and microscopes keep laboratories organized and allow them to function. Lab supplies chemicals and consumables help provide reliable, accurate results.
Classification of lab testing supplies:
Lab testing supplies include reagent supplies and non-reagent supplies.
Reagent supplies include:
Chemical reagents, reference reagents, standard materials, lab water, microbial culture media, kits, solutions or solid mixtures prepared by related reagents, etc.
Non-reagent supplies include:
Glassware, experimental gas, special supplies for instruments, filter paper, rubber products, etc.
Examination supplies have dangerous characteristics such as explosion, flammability, poison, infection, corrosion, radioactivity, etc. In transportation, storage, use and disposal, it is easy to cause personal injury or death, property damage or environmental pollution, and items requiring special protection and easy to poison Chemicals become "dangerous goods".
Lab supplies chemicals
The following chemicals are commonly used Lab supplies:
1. Hydrochloric acid: hydrochloric acid has a strong pungent odor and is highly corrosive. It is extremely volatile.
2. Concentrated sulfuric acid: concentrated sulfuric acid has strong oxidizing property at high concentration, which is one of the biggest differences between it and dilute sulfuric acid. At the same time, it also has dehydration, strong oxidation, strong corrosivity, low volatility, acidity, water absorption, etc.
3. Nitric acid: nitric acid is a strong acid with strong oxidizing and corrosive properties. Nitric acid is unstable, and it will decompose when exposed to light or heat to release nitrogen dioxide. In frosted outer plastic bottles (not recommended), contact with reducing agents is strictly prohibited.
4. Perchloric acid: the first of the six inorganic strong acids, the hydrate of the highest price oxide of chlorine. It is a colorless and transparent smoking liquid.
5. Hydrofluoric acid: clear, colorless, smoky and corrosive liquid with strong pungent odor. It is extremely corrosive and can strongly corrode metals, glass and silicon-containing objects. It needs to be sealed in a plastic bottle and kept in a cool place.
6. Glacial acetic acid: glacial acetic acid (purified), that is, anhydrous acetic acid, organic compounds. It solidifies into ice at low temperature, commonly known as glacial acetic acid. Volume expansion during solidification may cause the container to rupture.
7. Ferrous sulfate: blue-green monoclinic crystals or particles, odorless. Weathered in dry air, the surface is oxidized to brown basic ferric sulfate in moist air. Soluble in water, almost insoluble in ethanol. Irritating. Anhydrous ferrous sulfate is a white powder, and the crystal water contains light green crystals, commonly known as "green alum".
(1) Ferrous sulfate is used for flocculation and purification of water, as well as phosphate removal from urban and industrial sewage to prevent eutrophication of water bodies.
(2) A large amount of ferrous sulfate is used as a reducing agent, mainly reducing chromate in cement.
(3) Adjust the soil pH and promote the formation of chlorophyll (also known as iron fertilizer).
8. Potassium dichromate: orange-red triclinic crystal or needle crystal, soluble in water, insoluble in ethanol. Slightly soluble in cold water, the aqueous solution is weakly acidic and easily soluble in hot water. Poisonous and carcinogenic strong oxidant. The acidified potassium dichromate can oxidize and change the color of ethanol to check whether the driver is drunk.
These lab supplies have certain risks. They must be used strictly in accordance with the user manual to avoid direct contact with the skin.
Lab supplies for schools
If the laboratories of colleges and universities are divided according to their service functions, they can be divided into teaching laboratories and research laboratories. Teaching laboratories mainly undertake the experimental teaching tasks of undergraduates, while research laboratories are responsible for The cultivation of master's and doctoral students, on the other hand, is to undertake the scientific research tasks of countries, provinces and cities, and even some international cooperation projects. Such laboratories have the characteristics of large number of personnel, fast flow, sophisticated equipment, and complicated experimental supplies. These problems seem simple, but they are very complicated to manage.
Lab supplies need to be constantly replenished and updated, and a standardized lab should have policies and procedures for selecting and purchasing supply commodities. There should also be procedures for the purchase, acceptance and storage of reagents and consumable materials related to testing and calibration. And shall ensure that the purchased supplies, reagents and consumable materials that affect the quality of testing and/or calibration are only put into use after they have been inspected or verified to meet the standard specifications or requirements specified in the relevant testing and/or calibration methods. This shows the importance of lab procurement and management. In colleges and universities lab reagents and consumable materials account for a considerable proportion, the quality of which is directly related to the success or failure of the experiment, and plays an important role in the management of the entire lab. Usually we divide lab supplies into two parts, namely experimental reagents and supplies for instruments.
With the continuous expansion of the scale of university construction and the rapid development of science and technology, there has been a high degree of integration on the basis of the high degree of differentiation of various disciplines, interdisciplinary intersecting and interpenetrating, and constantly emerging new edges, emerging disciplines and research fields. Lab supplies also present problems such as many varieties, fine division, miscellaneous manufacturers, many specifications, difficult storage, and high safety requirements, and have a high degree of timeliness and the possibility of potential losses. Therefore, the traditional "account book" management is no longer adapted to the new form of procurement management. How to respond to the requirements of the procurement and management of college research lab supplies under the new situation, better serve the teaching and scientific research, and improve the lab management efficiency to ensure the scientificity and accuracy of the experimental results is a matter of great importance that is easily overlooked in the lab management of colleges and universities.
Management of lab supplies
General management requirements
1. Formulate a procurement plan:
Laboratories should formulate a procurement plan and make purchases according to the plan. Some laboratories have no procurement plan and are more willing to purchase supplies. On the one hand, they increase the workload of acceptance, on the other hand, they cause unstable factors for the quality of inspection work.
2. Implement procurement:
Establish and improve supplier files, maintain at least three suppliers of the same type of supply, investigate and evaluate the qualifications, credibility, and types of business of the suppliers, so that the procurement of supplies must be economical and more to ensure the quality, the quality of the supplies must be the first; according to the procurement situation, the suppliers are regularly evaluated and recorded, and qualified suppliers are selected through long-term cooperation.
3. Supplies acceptance:
Supplies must be comprehensive in their acceptance, and they must be targeted. It is practical to check the links that may affect the quality of the test, and exclude the factors that affect the test.
The management department is responsible for the acceptance of the specifications, grades, quantities, shelf life and quality certification documents of supplies. The user department is responsible for the acceptance of the quality of supplies. When accepting key supplies, corresponding documents should be drawn up to guide the acceptance.
4. Supplies use:
When the supplies are used, the management department and the use department should do the handover of the supplies and make a record of the delivery. Dramatic drugs strictly implement the principles of on-demand use, measurement records, and surplus return.
Supplies library management
The supplies' library should have detailed storage records, inventory records, storage records and return records, so that the accounts are consistent. Compile electronic documents of stock supplies and update them in real time for use and management personnel to consult.
According to the characteristics of supplies, they are stored separately: double drugs are double-locked and stored separately; oxidative substances and reducing substances are stored separately; organic and inorganic substances are placed in separate areas; solids are on top and liquids are on bottom.
According to the storage requirements of supplies, configure safety facilities, do a good job of monitoring the supplies warehouse environment, fill in monitoring records, and ensure that the environment meets the requirements. Strengthen the management of dangerous goods, double drugs and double locks for drug use, measurement and use, and surplus return. Open fires and other non-consumable items are strictly prohibited from entering the warehouse.
When using supplies, care should be taken to protect the label identification of the supplies to prevent contamination and damage to the labels. Those who need special requirements for storage should meet the storage requirements and make relevant records; pay attention to the effective use period of supplies. The supplies should be used within the effective period. Supplies beyond the effective period are generally treated as inspection waste to prevent misuse.
After the reagents are taken, the bottle mouth should be effectively closed in time to prevent the reagents from failing or overflowing to pollute the environment or cause safety accidents. After the bottled reagent supplies are used up, the empty bottles should be returned to the supplies library, and the empty reagent bottles should not be disposed or discarded at will. The prepared reagent solution should meet the specified requirements, write and label in time.
Use appropriate containers to store reagents. Do not use volumetric flasks, graduated test tubes, and other long-term storage solutions. The experimental gas cylinders should be fixed as necessary to prevent falls and accidents; when replacing the gas cylinders, attention should be paid to leak detection at the valve connection.
Inspection and Supplies
The lab shall carry out necessary inspections and assessments on the management of supplies. Clearly require and control the key points of problems that are likely to occur during the storage and use of supplies, and conduct regular inspections and assessments. Cultivate well-used consumption habits of supplies, guide the management of inspection supplies in an orderly and reasonable manner, and ensure the safety of experiments and the accuracy of inspection data.
The world's top 10 lab supplies companies
1. Thermo Fisher Scientific (USA)
2. Agilent (USA)
3. GE China Medical Group GE Halthcare
4. LEICA (Germany)
5. Eppendorf (Germany)
6. BECKMAN-coulter (USA)
7. Invitrogen (USA)
8. TEDIA (USA)
9. Mori SEN (USA)
10. X-Rite (USA)