How to eliminate the systematic error in the experiment?Systematic error is the difference between the average of the results of an infinite number of measurements of the same measurement and the true value being measured under repetitive conditions. It is often caused by unavoidable factors. Causes of systematic errors The systematic error is caused by

How to check the instruments in the laboratory? In recent years, with the development of science and technology, the increase of experiment and testing tasks, the number of purchases and procurement methods of laboratory instruments and equipment have undergone tremendous changes, and the acceptance of instruments and equipment has become a major task that cannot

How to effectively eliminate bubbles in the burette? Eliminating the bubbles in the burette is an important step in the titration, which directly affects the detection results. Then, how to effectively and quickly eliminate the bubbles in the burette? First, what is the effect of bubbles in the burette on the test results?1. If there

lab Glassware use and properties Glassware is one of the most frequently used instruments in the laboratory, and no material can predict it. However, in order to better use glassware, in addition to the basic operating skills, it is also important to understand the material properties of glassware, which will give you a deeper understanding

Japanese university laboratories have done these 5 points The research level of Japanese universities is at the forefront of the world, and research work is also very active, and these are often attributed to their adequate teaching resources, spacious experimental sites and advanced equipment. This paper introduces the experimental environment and experimental conditions, experimental raw

Why are glass cuvettes used? Historically, reusable quartz cuvettes were required for measurements in the ultraviolet range, because glass and most plastics absorb ultraviolet light, creating interference. … Glass, plastic and quartz cuvettes are all suitable for measurements made at longer wavelengths, such as in the visible light range. Why is glass cuvette not suitable for UV? Glass cells are most common in

maintenance of precision instruments For different instruments, there are some specific requirements. Taking the atomic fluorescence spectrometer as an example, it may cause the following problems in the laboratory environment: the fluorescence value is abnormal during the test, the test line fluctuates greatly; the hydrogenation atomizer has no flame; the test has no test line

Cleaning standard for laboratory glassware 1. cleanser and its scope of use The most commonly used cleaners are soap, soap liquid (special products), detergent, decontamination powder, lotion, organic solvent and so on.Soap, liquid soap, washing powder, and detergent powder, used for glassware, can be directly brushed with a brush such as beakers, flasks, bottles; lotion

How to use the measuring cylinder A graduated cylinder is a measuring tool that measures the volume of a liquid. Before using the measuring cylinder, we should first check the measuring range and the minimum scale value of the measuring cylinder. When reading, the measuring cylinder must be placed flat on the horizontal table. After

How to use the burette Laboratory Burette In general, the burettes used in chemical laboratories mainly include non-plug burettes, seat burettes, three-way piston burettes, plug burettes, and side piston burettes. Among them, the advantages of the plugless burette and the stopper with the plug burette are most prominent. 1. Selection principle From the perspective of