Method for detecting remaining trace tween 80 in water

Abstract

The invention discloses a method for detecting remaining trace tween 80 in water, and aims to provide the method for detecting the remaining trace tween 80 in the water, which has the advantages of directly determining by using an ultraviolet visible spectrophotometer, along with low analysis cost, easiness, convenience and fastness in operation and accurate analysis result. The method comprises the following steps of: dissolving a tween 80 sample in distilled water to prepare sample solutions of different concentrations; detecting the sample solutions of different concentrations by using the ultraviolet visible spectrophotometer at the detection wavelength of 232nm, drawing the obtained absorbency into a standard curve and acquiring a linear regression equation based on the standard curve according to a Beer-Lambert law; detecting the absorbency of the water sample with unknown tween 80 content by using the ultraviolet visible spectrophotometer at the wavelength of 232nm; and calculating the content of the tween 80 in the unknown water sample based on the linear regression equation. In the method, the ultraviolet visible spectrophotometer is used for direct determination; and a specific measure is provided for scientifically and quantitatively monitoring the content of the tween 80 in the water body.

Description

technical field [0001] The invention relates to a method for detecting residual traces of Tween 80 in water. Background technique [0002] With the increasing scale of industrial production and application of nonionic surfactants, more and more nonionic surfactants are produced through various channels (especially printing and dyeing wastewater, papermaking wastewater, detergent industrial wastewater, domestic wastewater, etc.) Entering the water body, causing the water quality to decline and increasing the COD of the water body. [0003] Tween 80 (Tween 80, polyoxyethylene 80sorbitanmonooleate, polysorbate 80) is a non-ionic surfactant formed by addition of sorbitan oleic acid monoester and ethylene oxide, which has good emulsification and solubilization , Widely used in medicine, food and other industries. At the same time, it is used as an accelerator in the biological treatment of hydrophobic and refractory organic substances such as polycyclic aromatic hydrocarbons, b...

AI Technical Summary

Problems solved by technology

Tween 80 is a non-ionic surfactant, and its aqueous solution is easy to form a film and is not easy to destroy. If there is a small amount of Tween 80 in the water body, many foams will be generated during the stirring or shaking process, which will cause unpleasant visual effects.

Although the safety of Tween 80 has been deeply researched at home and abroad, and there are corresponding regulations on its maximum limit in pharmaceuticals, food and other industries, there are no specific measures for the detection method of Tween 80 content in water.

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