The reason you failed the experiment may be that you didn't master these skills
I often hear friends who "shake bottles" in the lab complain, "it's time to do the experiment again. Every time we prepare the experimental equipment, it's really too hard to use, and it's often found that all kinds of equipment are not good to use and not suitable for during the course of the experiment." The result is another unsatisfactory result. "
To do experiments, scientific research ideas are of course important, but the preparatory work in the early stages of the experiment is also quite a bit of a key! "Grinding knives do not miss cutting firewood", choose the right experimental equipment, it is equal to choose the right friends, doing experiments can naturally let you achieve twice the result with half the effort!
Today, let's talk to you about the laboratory, a lot of novice researchers can easily ignore the equipment knowledge.
1. Disposable needle filter
Disposable needle filter, commonly known as filter membrane, usually has two types of water membrane and organic membrane. The water system and organic system are distinguished according to the filter membrane material. The water system is used to filter aqueous solution (the water membrane material is generally made of cellulose acetate membrane (CA), nitrate cellulose membrane (CN) and mixed ester membrane, mainly suitable for life science). Organic system is used to filter organic solution (RC), polytetrafluoroethylene membrane (PTFE), nylon membrane (Polyamide), is mainly suitable for chemistry).
The price of organic systems is generally higher than that of water systems. Organic filtration membrane can filter aqueous solution, but water system filter membrane can not filter organic solution, otherwise the filter membrane will be dissolved by organic solvent. In the case of a mixed solution, an organic filter membrane is also required.
There are three kinds of membrane pore sizes of disposable needle filters: 0.1U 0.22 and 0.45 μ m, which can be selected according to the requirements of the experiments. When used, it can be used in combination with disposable syringe, which is suitable for filtration with small liquid volume or insoluble substance. It is mainly used in sample pre-filtration, laboratory biological fluid, culture medium and medium additive sterilization filtration.
2, disposable syringe
Disposable syringe, sterile packaging, namely open, heat source, limited one-time use to prevent sample contamination; there are two styles: with and without needles; clear calibration, easy to see the volume of liquid. A variety of specifications are optional, 1 ml 2 ml 5 ml 10 ml 20 ml 30 ml 50 ml. In the experiment, it is often used with disposable needle filter to form a simple filter device, which can be used to filter samples with small liquid volume quickly and conveniently.
3, blue cap bottle
A variety of solutions are often used in the laboratory, but after configuration, one inexhaustible, need to be stored for the next time, this time the blue bottle is very popular, it can be used for liquid storage, sample preparation, transportation and so on. The body of the blue cap bottle is made of 3. 3 borosilicate glass (also called KG-33 glass), which conforms to the ASTM E-438I class A glass parameter standard and is the highest quality grade glass. The lowest coefficient of thermal expansion, strong thermal impact resistance, can endure 450 °C high temperature for a long time, and can be sterilized by high pressure steam. Highest chemical tolerance, low sodium and potassium, no calcium Magnesium zinc and other heavy metal ions, no precipitation, low permeability, not easy to affect the storage of the solution system;
Its head with leakproof polypropylene (PP) cover, heat-resistant, corrosion-resistant, O-type drip ring, no leakage, can be replaced. Highly polished surface, not easy to residue, easy to clean. Clear scale, white enamel marking area, easy to mark durable. It has a variety of capacity models to choose from.
To do experiments, scientific research ideas are of course important, but the preparatory work in the early stages of the experiment is also quite a bit of a key! "Grinding knives do not miss cutting firewood", choose the right experimental equipment, it is equal to choose the right friends, doing experiments can naturally let you achieve twice the result with half the effort!
Today, let's talk to you about the laboratory, a lot of novice researchers can easily ignore the equipment knowledge.
1. Disposable needle filter
Disposable needle filter, commonly known as filter membrane, usually has two types of water membrane and organic membrane. The water system and organic system are distinguished according to the filter membrane material. The water system is used to filter aqueous solution (the water membrane material is generally made of cellulose acetate membrane (CA), nitrate cellulose membrane (CN) and mixed ester membrane, mainly suitable for life science). Organic system is used to filter organic solution (RC), polytetrafluoroethylene membrane (PTFE), nylon membrane (Polyamide), is mainly suitable for chemistry).
The price of organic systems is generally higher than that of water systems. Organic filtration membrane can filter aqueous solution, but water system filter membrane can not filter organic solution, otherwise the filter membrane will be dissolved by organic solvent. In the case of a mixed solution, an organic filter membrane is also required.
There are three kinds of membrane pore sizes of disposable needle filters: 0.1U 0.22 and 0.45 μ m, which can be selected according to the requirements of the experiments. When used, it can be used in combination with disposable syringe, which is suitable for filtration with small liquid volume or insoluble substance. It is mainly used in sample pre-filtration, laboratory biological fluid, culture medium and medium additive sterilization filtration.
2, disposable syringe
Disposable syringe, sterile packaging, namely open, heat source, limited one-time use to prevent sample contamination; there are two styles: with and without needles; clear calibration, easy to see the volume of liquid. A variety of specifications are optional, 1 ml 2 ml 5 ml 10 ml 20 ml 30 ml 50 ml. In the experiment, it is often used with disposable needle filter to form a simple filter device, which can be used to filter samples with small liquid volume quickly and conveniently.
3, blue cap bottle
A variety of solutions are often used in the laboratory, but after configuration, one inexhaustible, need to be stored for the next time, this time the blue bottle is very popular, it can be used for liquid storage, sample preparation, transportation and so on. The body of the blue cap bottle is made of 3. 3 borosilicate glass (also called KG-33 glass), which conforms to the ASTM E-438I class A glass parameter standard and is the highest quality grade glass. The lowest coefficient of thermal expansion, strong thermal impact resistance, can endure 450 °C high temperature for a long time, and can be sterilized by high pressure steam. Highest chemical tolerance, low sodium and potassium, no calcium Magnesium zinc and other heavy metal ions, no precipitation, low permeability, not easy to affect the storage of the solution system;
Its head with leakproof polypropylene (PP) cover, heat-resistant, corrosion-resistant, O-type drip ring, no leakage, can be replaced. Highly polished surface, not easy to residue, easy to clean. Clear scale, white enamel marking area, easy to mark durable. It has a variety of capacity models to choose from.
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