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Detecting method for water-quality phenolic compound content

A technology of phenolic compounds and detection methods, which is applied in the field of water quality detection, can solve the problems of no peak appearance and poor peak output effect, and achieve the effect of high cost performance, cheap price and better peak output effect

Inactive Publication Date: 2019-05-28
江苏康达检测技术股份有限公司
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Problems solved by technology

[0003] At present, gas chromatography-mass spectrometry is usually used to detect the content of phenolic compounds, and the sample is processed according to the derivatization reagent in the national standard, and then the peak effect after detection by gas chromatography-mass spectrometer is poor, or even no peak appears

Method used

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Embodiment

[0027] A kind of detection method of water quality phenolic compound content, described method comprises the steps:

[0028] (1) Extract the sample liquid to be derivatized

[0029] Take 500ml of the water sample to be tested and place it in a 1L separatory funnel, add sulfuric acid to adjust the pH of the water sample to ≦1, weigh 15g of sodium chloride into the water sample to be tested, shake to dissolve, measure 50ml of dichloromethane-ethyl acetate and mix solution, after shaking and extracting for 10 min, the organic phase was collected by standing still, and the water was removed by anhydrous sodium sulfate;

[0030] Repeat the above extraction steps three times, the combined extracts are concentrated to near-dryness by a rotary evaporator, and the volume is adjusted to 1ml with n-hexane to obtain the sample solution to be derivatized.

[0031] (2) Derivatization of the sample

[0032] Add 100 μ L of the first derivatization reagent to the sample solution to be deriva...

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Abstract

The invention relates to a detecting method for the water-quality phenolic compound content. The method includes the following steps of (1) extracting to-be-derived sample liquid; (2) conducting derivatization of a sample, wherein 100 microliters of a first derivatization agent is added into the to-be-derived sample liquid, the mixture is reacted for 1 h at the room temperature, and then is put into a GC-MS and detected and analyzed, and the first derivatization agent is BSTFA; (3) conducting derivatization of a standard working solution; (4) calculating the concentration. According to the detecting method for the water-quality phenolic compound content in the embodiment, by changing the steps of the to-be-derived sample liquid and the derivatization agent, the peaking effect is better, and the steps that the temperature is increased to replace a solvent does not need to be conducted during derivatization; compared with the national standard, the detecting method is easier, and the used derivatization reagent is cheaper in price and higher in cost performance.

Description

technical field [0001] The invention relates to the technical field of water quality detection, in particular to a method for detecting the content of phenolic compounds in water quality. Background technique [0002] Phenol pollution in water is mainly phenol-containing wastewater discharged by some industrial enterprises, such as coking, papermaking, plastics, dyes, drugs, herbicides, pesticides, wood processing and many other industries. When the concentration of phenol in the water reaches 0.1-0.2mg / At L, the fish living in this kind of water body will contain phenols. If people eat this kind of fish and the amount of phenols ingested exceeds the detoxification ability of the body, chronic poisoning will occur, such as headache, dizziness, vomiting, Diarrhea, nervous disorder, anemia and other symptoms, using polluted water as drinking water, under the action of chlorine gas for disinfection to form chlorophenol, its taste is enhanced by one to two orders of magnitude t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 李冠华付杰方圆李军
Owner 江苏康达检测技术股份有限公司
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