Efficient weighing analytical balance and use method thereof

Abstract

The invention provides an efficient weighing analytical balance. A window is arranged on the upper middle part of the side door of the analytical balance. A plurality of strip-shaped or granular protrusions are arranged on the inner edge of the window. An independent vibrator is arranged on the ground of the outer side of one side door where the window is located. A vertical vibrating rod is arranged on the vibrator. A support table is horizontally arranged on the upper end of the vibrating rod. The support table exactly faces the window. The existence of the window controls the weighing errorcaused by the wind force within an acceptable error range; the protrusions of the inner edge of the window or the peripheral vibrator can cause the weighing spoon to vibrate slightly, thereby shakingoff the sample or reagent in the weighing spoon a little bit and making the phase more accurate and efficient; and when the weighing spoon is in contact with the inner edge of the window or the support table, the static electricity can be eliminated, and the weighing error caused by the static electricity is also reduced. The weighing error is small, the labor intensity is reduced and the weighing efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of balances, and in particular relates to an analytical balance for high-efficiency weighing and an application method thereof. Background technique [0002] Analytical balance is an indispensable device in the laboratory, and it plays an irreplaceable role in accurately measuring samples or reagents of a certain quality. [0003] Due to the presence of a large number of volatile reagents in the laboratory and the high cleanliness requirements of the laboratory air, a complete air cleaning system should be equipped. The entry of clean air and the outflow of dirty air will inevitably cause large-scale air flow, even for experimental The room can ensure that the laboratory is mainly downdraft (an ideal clean room can meet higher downdraft requirements). Due to the existence of air flow, it will inevitably have a certain impact on the weighing precision and accuracy of the analytical balance; generally speaking...

AI Technical Summary

Problems solved by technology

[0003] Due to the presence of a large number of volatile reagents in the laboratory and the high cleanliness requirements of the laboratory air, a complete air cleaning system should be equipped. The entry of clean air and the outflow of dirty air will inevitably cause large-scale air flow, even for experimental The room can ensure that the laboratory is mainly downdraft (an ideal clean room can meet higher downdraft requirements). Due to the existence of air flow, it will inevitably have a certain impact on the weighing precision and accuracy of the analytical balance; generally speaking , when the influence of the error is less than 0.2mg (or 0.5mg, depending on the weighing accuracy), it can be ignored. When it is difficult for us to overcome the influence of wind force, we need to add an additional windshield, which will make the operation of the weigher more troublesome.

[0004] When weighing lighter powders (or crystals) such as carbon black, such a phenomenon often occurs: the powder is partially adsorbed on the front end of the weighing spoon due to static electricity, and after weighing to the required weight, remove the weighing spoon. When measuring the spoon, the powder adsorbed on the front end of the weighing spoon sometimes breaks away from the weighing spoon due to the change of the electrostatic field or its own inertia when the weighing spoon is removed, and this part of the powder will fall on the weighing container, resulting in weighing Inaccurate, large error, or falling on the weighing platform of the analytical balance or around the inside of the analytical balance, polluting the analytical balance;

[0005] The source of static electricity may come from the weigher, weighing spoon, pharmaceutical reagents or containers, etc. For example, every time the type of weighing sample is changed, the weighing spoon needs to be cleaned, usually by using a dust-free paper to clean the front body of the weighing spoon Wipe, during this process, both the friction and the activity of the weigher may generate static electricity. When there is obvious static electricity, it is usually necessary to use static elimination devices such as static guns to reduce static electricity, which undoubtedly increases the workload of the weigher. The weighing time is extended, and the possibility of contamination of the weighing sample during the static elimination operation is also increased

[0006] In addition, during accurate weighing, in order to avoid contamination, it is required that the sample or reagent that has fallen into the weighing container cannot be recovered into the sample or reagent bottle. When weighing to the end, there is often a milligram-level weight left. It needs to be adjusted. At this time, the other hand of the weigher is required to pat the hand holding the weighing spoon to make the items in the weighing spoon fall a little bit. This operation requires a certain amount of experience to operate skillfully, and the human factor is relatively large. The fluidity of different samples or reagents is different, and the weigher needs to weigh carefully, which will undoubtedly prolong the weighing time and increase the workload

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