Dedicated measuring flask in use for preparing and storing volatile titer, and method of use

Abstract

The invention publishes an application method and special-purpose measuring flask for confecting and reserving of volatile standard fluid. The special-purpose flask includes the thread bottle cap, the silica gel gasket, the T silica gel closing plug, and the measuring flask. The screw thread is on the outside of flask. The flask has scale on its body. The thread of flask has the T silica gel closing plug. Screw thread bottle-neck fixes on the screw thread sect of bottle mouth. With the screw thread bottle-neck, silica gel closing plug and T silica gel closing plug, it can ensure non-volatility in the confecting and reserving process fully; ensure stability of volatility sample, which has confecting and reserving function. In the confecting process, it can ensure veracity of the sample; predigest operation process, and no harmful to the operation personnel.

Description

Technical field: [0001] The invention relates to a glass measuring instrument used in an analysis laboratory, in particular to a glass measuring instrument used for preparing and storing volatile standard solutions. Background technique: [0002] At present, when preparing and storing a series of toxic and harmful volatile solvents and standard substances such as benzene series, halogenated hydrocarbons, and pesticide residues, analytical laboratories usually use volumetric flasks for preparation, and glass bottles with better airtightness for storage. However, in the actual operation and application process, there are still the following defects: [0003] ① When preparing the above-mentioned volatile standard solution, the volumetric flask must be filled with the standard substance in an open state. Since the solvent and the standard substance are volatile liquids, the solvent and the standard substance will continue to volatilize during the operation, which brings Two con...

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Problems solved by technology

[0003] ① When preparing the above-mentioned volatile standard solution, the volumetric flask must be filled with the standard substance in an open state. Since the solvent and the standard substance are volatile liquids, the solvent and the standard substance will continue to volatilize during the operation, which brings Two consequences, one is that volatile toxic and harmful solvents and standard substances will cause harm to the health of experimental operators; the other is that when preparing mixed standard substances, the bottle cap must be opened many times, causing the volatilization loss of the standard substance, making the prepared The concentration of the standard substance is not allowed

[0004] ②Due to the poor sealing performance of the volumetric flask, the standard liquid must be transferred to other containers with better sealing for storage after preparation, and there is also volatility loss during the transfer process; although it can be stored in a container with better sealing To prevent volatilization, but it is still necessary to open the bottle cap to take samples every time it is used. In this way, during use, there are also volatile toxic gases that will harm the health of the experimental operators and cause the concentration of the standard substance to be inaccurate due to the volatilization loss of the standard substance. defect

[0005] According to the applicant's search and investigation, there is no ideal glass measuring instrument in China at present, which can effectively solve the above-mentioned problems encountered in the preparation and storage of volatile standard solutions in the laboratory

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