Pretreatment method for simultaneously purifying persistent organic pollutants of multiple classes in environmental medium

Abstract

The invention discloses a pretreatment method for simultaneously purifying persistent organic pollutants of multiple classes in an environmental medium. The method comprises the following steps: filling silica gel, alkaline silica gel, silica gel, acidic silica gel, silica gel, copper powder and anhydrous sodium sulfate into a sand core-containing purification column with an inner diameter ranging from 10mm to 12mm from bottom to top in order to obtain a self-prepared compound silica gel column; purifying and eluting an environmental medium sample containing the POPs (Persistent Organic Pollutants) of three classes, including organo-chlorine pesticides, polychlorinated biphenyls and dioxins by using the self-prepared compound silica gel column for the first time to obtain the concentrated liquor of primary purification and elution; selecting a packed column having the inner diameter ranging from 8mm to 12mm, and filling glass wool, anhydrous sodium sulfate, activated carbon dispersed silica gel, anhydrous sodium sulfate and glass wool into the packed column from bottom to top in order to obtain a self-prepared activated carbon dispersed silica gel column; and carrying out purification and elution on the concentrated liquor of primary purification and elution obtained in the step 2 by using the self-prepared activated carbon dispersed silica gel column obtained in the step 3, and orderly separating to obtain an eluate containing the POPs of each class in the environmental medium sample containing the POPs of three classes.

Description

technical field [0001] The invention relates to the technical field of monitoring multiple types of persistent organic pollutants in environmental media, in particular to persistent organic pollutants such as organochlorine pesticides, polychlorinated biphenyls and dioxins in environmental media such as air, waste gas, soil and sediments The simultaneous purification pre-treatment technology, specifically, is a pre-treatment method for simultaneous purification of multiple types of persistent organic pollutants in environmental media. Background technique [0002] Persistent organic pollutants (POPs) are organic pollutants that can persist in the environment. They have four characteristics of high toxicity, bioaccumulation, refractory degradation and long-distance transmission. Once these substances enter the human body, they will accumulate in the body, and when they reach a certain amount, they will cause human endocrine system disorder, reproductive and immune System dam...

AI Technical Summary

Problems solved by technology

However, to detect the concentration of the other two types of compounds in this sample, another pretreatment method must be used to purify the same purpose, which greatly increases the workload of the worker, prolongs the detection time, increases the detection cost, and becomes a large-scale method. A major bottleneck in the monitoring of multiple types of POPs in samples

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