Method for determining water quality phenolic compounds

Abstract

The invention discloses a method for determining water quality phenolic compounds, and relates to the field of water quality detection. The method comprises the following steps of: step 1, collectinga sufficient amount of water sample by a glass bottle; step 2, immediately adding a reducing agent and an appropriate amount of hydrochloric acid to adjust the pH<2, after the water sample is collected; step 3, pouring the collected water sample into a separatory funnel; step 4, extracting target compounds to obtain an organic phase extract, and dehydrating the organic phase extracted with anhydrous sodium sulfate; step 6. concentrating and performing constant volume on the organic phase extract, and detecting by a machine to obtain a sample spectrum; step 7, comparing the sample spectrum witha standard spectrum, finding out the peak position of each target compound, and calculating a rho standard in combination with a calibration curve; and step 8, calculating the concentration rho i ofthe target compound in the water sample according to the formula rho i = rho standard x V1 x 1000 / V2. The probability of oxidation of the phenolic compounds is effectively reduced, and the detection accuracy is improved since the water sample is added with the reducing agent in the pretreatment.

Description

technical field [0001] The invention relates to the field of water quality detection, in particular to a method for determining water quality phenolic compounds. Background technique [0002] With the continuous improvement of the overall economic level of our society, the country and all walks of life are paying more and more attention to environmental protection issues. Water resources are the basis for our human survival, and our country is originally a big country with a shortage of water resources. Therefore, the protection of water resources has become an unshirkable responsibility for the people of the country and all sectors of society. [0003] During this period, the detection of water quality has become an important reference index for us to take effective measures in the process of water resource protection, such as through the detection of nitrogen oxide content, microbial pathogenic bacteria content, heavy metal content, etc. in water. [0004] Phenolic compou...

AI Technical Summary

Problems solved by technology

[0006] However, since 6 of the 13 phenolic compounds, phenol, 2-chlorophenol, 3-cresol, 2,4-xylenol, 4-chlorophenol and 4-chloro-3-cresol Compared with the other 7 kinds of phenolic compounds, the 6 substances are relatively unstable and easily oxidized. Therefore, when doing blank water sample detection, it is often impossible to obtain accurate peak values. Therefore, it is easy to increase the error of water sample detection.

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