Determination method for o-phthalaldehyde

A technology for the determination of o-phthalaldehyde and its determination method is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, which can solve the problems of inaccurate detection results and achieve simple operation, The effect of improving accuracy and high precision

Inactive Publication Date: 2014-08-20
山东安捷高科消毒科技有限公司
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Problems solved by technology

[0004] The invention provides a method for measuring o-phthalaldehyde to solve the problem of inaccurate detection results in the prior art

Method used

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Embodiment Construction

[0017] A method for determining o-phthalaldehyde, first using excess hydroxylamine hydrochloride solution and triethanolamine solution to react with o-phthalaldehyde, then using 0.1 mol / liter sulfuric acid standard solution to titrate the reacted solution, heating while titrating Side titration, the specific steps are as follows:

[0018] 1) Analysis solution preparation: preparation of neutral hydroxylamine hydrochloride solution, preparation of 6.5% triethanolamine solution by mass content, preparation and calibration of 0.1 mol / liter sulfuric acid standard solution;

[0019] 2) Reaction: use a pipette to draw 25 ml of triethanolamine solution, 20 ml of hydroxylamine hydrochloride solution and 10 ml of o-phthalaldehyde disinfectant solution, mix these three solutions, seal and react for 1 hour;

[0020] 3) Titration: first use blank titration, consume sulfuric acid titration solution V1, react for 1 hour to test the sample with sulfuric acid titration solution, titrate until...

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Abstract

The invention provides a determination method for o-phthalaldehyde. The determination method comprises the following steps: reacting an excess hydroxylamine hydrochloride solution and a triethanolamine solution with o-phthalaldehyde; and titrating a reacted solution by 0.1mol/L sulfuric acid standard solution while heating. Therefore, a titrating solution is sufficiently titrated and reacted, and the accuracy of determination on the content of o-phthalaldehyde in disinfection liquid is greatly improved. The determination method has the advantages of simplicity in operation and high precision.

Description

technical field [0001] The invention relates to a method for determining the effective components of a disinfectant, in particular to a method for determining o-phthalaldehyde. Background technique [0002] Ortho-phthalaldehyde, referred to as OPA, is light yellow needle crystal. It has a melting point of 56-57°C and a flash point of over 110°C. It is soluble in water, alcohol, ether, etc., and slightly soluble in petroleum ether. It is a pharmaceutical intermediate and the latest high-efficiency and safe antibacterial disinfectant for external use. It can be used for the disinfection and sterilization of instruments used in endoscopic surgery in hospitals. [0003] At present, in the disinfectant production industry, the determination of the content of o-phthalaldehyde is mostly carried out by the determination method of glutaraldehyde. The content is lower than that of glutaraldehyde in glutaraldehyde-based disinfectants. Titration with 0.25 mol / liter sulfuric acid stand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 刘峰董淑芹
Owner 山东安捷高科消毒科技有限公司
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