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  • What to pay attention to when using glass test tubes

    What to pay attention to when using glass test tubes 1. In order to facilitate shaking and prevent the phenomenon of overflowing outside the tube during boiling, the liquid medicine contained in the glass test tube should not exceed 1/3 of the volume. 2. The powdered drug can be fed into the pape...
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  • What are the types of glass test tubes

    What are the types of glass test tubes A glass test tube is a common and simple glass instrument used to hold a small amount of medicines for experiments in chemistry, physics, biology, medicine, agriculture, and industry. According to the different raw materials, glass test tubes can be divided ...
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  • Can trifluoroethanol be packed in plastic test tubes?

    Can trifluoroethanol be packed in plastic test tubes? Common PE, PS and PC disposable plastic test tubes can withstand trifluoroacetic acid and trifluoroethanol, but do not use containers containing fluoropolymers such as PVDF and PTFE, which will slowly corrode the fluoroplastics. Reference as a...
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  • Why is it best to use plastic test tubes and beakers during DNA extraction?

    Why is it best to use plastic test tubes and beakers during DNA extraction? Generally, when we do DNA extraction, we use chicken blood cells for extraction. The reason for using chicken blood cells is that the red blood cells of birds still have DNA when they mature; the red blood cells of mammal...
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  • Let’s learn about reagent bottles together

    Let’s learn about reagent bottles together The reagent bottle is a container specially used in the laboratory to hold various liquid and solid reagents, and the shape is mainly divided into narrow mouth and wide mouth. Because the reagent bottle is only used for storing reagents at room tem...
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  • How to classify chemical reagents

    How to classify chemical reagents There are thousands of chemical reagent products, which can be divided into general reagents, standard reagents, high-purity reagents, special reagents, indicators and test strips, organic synthesis reagents, biochemical reagents, clinical reagents, etc. Here are...
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  • How to choose chemical reagents

    How to choose chemical reagents During the experiment, according to the requirements of the experiment, such as the sensitivity and selectivity of the analytical method, the content of the analytical object and the requirements for the accuracy of the analytical results, the chemical reagents of ...
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  • How to use chemical reagents

    How to use chemical reagents When repacking chemical reagents in the laboratory, generally solid reagents are placed in wide-mouth bottles, liquid reagents or prepared solutions are placed in narrow-mouth bottles or drop bottles, and reagents that are easily decomposed by light (such as AgNO3, KM...
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  • How to store different chemical reagents

    How to store different chemical reagents The storage of chemical reagents is also an important task for laboratory personnel. It is not advisable to store too many flammable, explosive and toxic chemical reagents in a general laboratory, and should be purchased at any time according to the amount...
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  • How to use liquid reagents

    How to use liquid reagents (1) When taking liquid reagents from the dropper bottle, use the dropper in the dropper bottle. When using, first lift the dropper out of the liquid surface, squeeze the rubber head with your fingers to expel the air, then insert the dropper into the reagent, loosen you...
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  • How to use solid reagents

    How to use solid reagents (1) Use a clean and dry spoon. The two ends of the medicine spoon are two large and small spoons, a large spoon is used when taking a large amount of solids, and a small spoon is used when taking a small amount of solids. Special key should be used. The used medicine spo...
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  • Storage of chemical reagents in quality laboratory

    Storage of chemical reagents in quality laboratory 1 The storage of chemical reagents is the responsibility of special personnel. 2 The custodian should be a professional and technical person with certain professional knowledge and a high sense of responsibility to ensure that chemical reagents a...
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