Pretreatment device for extracting oily substances in water

Abstract

The invention discloses a pretreatment device for extracting oily substances in water. The pretreatment device includes a sampling cup, an extraction bottle, a carbon tetrachloride liquid storage bottle and an air pump. The sampling cup and the carbon tetrachloride storage The liquid bottle is in fluid communication with the upper part of the extraction bottle, the extraction bottle is provided with a liquid outlet, and the air pump is in fluid communication with the liquid outlet. The invention adopts airflow disturbance extraction technology, the extraction rate is greater than 95%, and the degree of automation is high. It integrates automatic sampling, extraction, liquid drainage and cleaning, and can process 8 samples in sequence without manual replacement. It realizes unattended operation and saves manpower. and time.

Description

technical field [0001] The present invention uses carbon tetrachloride or other extraction solvents to extract oily substances in water, and is a pretreatment device for measuring total extracts, which can be used for mineral oils, animal and vegetable oils in surface water, underground water, domestic sewage, industrial waste water, and catering industry Oil fume emission detection is suitable for enterprises and institutions such as environmental monitoring stations, hydrological stations, petrochemical, machinery, automobile and aircraft manufacturing, medicine, agricultural technology, marine transportation and other industries. Background technique [0002] Existing methods for extracting oily substances in water include a separatory funnel manual extraction method and an automatic jet extraction method. [0003] Separating funnel manual extraction is a relatively traditional method used in laboratories at present, that is, using a separating funnel and manual oscilla...

AI Technical Summary

Problems solved by technology

This method is only suitable for extraction with a sample volume of less than 500mL. When the sample volume exceeds 500mL, it will take time for the vacuum pump to absorb, resulting in a longer time for the entire mixed extraction process, and the volume requirements for the jet bottle and the liquid storage bottle are increased. If you want to achieve multiple For sample extraction, the whole device is bulky and has no automatic cleaning function

In addition, the instruments currently on the market only have the automatic extraction function, and manual quantitative sampling is required for adding samples. The quantitative process will also bring physical harm to the experimenters.

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