Detecting method of 4-nonyl phenol in waste water or regenerated water

A detection method, the technology of nonylphenol, which is applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of small contribution of abundance, poor reproducibility of detection results, and inappropriate quantitative detection, and achieves low detection limit, improved detection, etc. Selectivity and sensitivity, the effect of high sensitivity

Inactive Publication Date: 2008-06-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
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Problems solved by technology

In this method, the characteristic ion with a mass-to-charge ratio of m / z=220 is the molecular ion peak of nonylphenol. Although it can be used as a qualitative basis for determining the molecular weight of nonylphenol, its abundance has little contribution to the quantitative detection of nonylphenol. Small (less than 1%, only 4 selected ions actually play a quantitative role), easily affected by interference ions, resulting in poor reproducibility of test results, not suitable for quantification of various isomer mixtures of nonylphenol Feature-selected ions detected

Method used

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  • Detecting method of 4-nonyl phenol in waste water or regenerated water
  • Detecting method of 4-nonyl phenol in waste water or regenerated water
  • Detecting method of 4-nonyl phenol in waste water or regenerated water

Examples

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example 1

[0033] Example 1: Detection of nonylphenol content in total influent samples of sewage treatment plants

[0034] (1) Extraction and enrichment of nonylphenol

[0035] ①Solid-phase extraction column: According to the characteristics of the complex matrix of the sewage sample, the extremely low content of the target substance, and the large interference, the Oasis from the American Waters Company was selected. HLB (Hydrophilic-LipophilicBalance) type hydrophilic-lipophilic equilibrium solid phase extraction column, packing 60mg, volume 3cc.

[0036] ② Activation of the solid phase extraction column: first wet the activated SPE column with 1ml of acetone + n-hexane eluent with a volume ratio of 1:1, and then rinse the packing with 5ml of ultrapure water with a resistivity greater than 18.2MΩ / cm.

[0037] ③Sampling: take 50 mL of sewage sample, acidify to pH=2-3, control the sample loading speed to be 2-3 mL / min, and make all the samples pass through the SPE column.

[0038] ④D...

example 2

[0045] Example 2: Detection of nonylphenol content in clean water pool samples of reclaimed water treatment plant

[0046] (1) Extraction and enrichment of nonylphenol

[0047] ①Solid-phase extraction column: According to the characteristics of the complex matrix of the regenerated water sample, the extremely low content of the target substance, and the large interference, the Oasis of American Waters Company was selected. HLB (Hydrophilic-Lipophilic Balance) type hydrophilic-lipophilic balance solid phase extraction column, packing 60mg, volume 3cc.

[0048] ② Activation of the solid phase extraction column: first wet the activated SPE column with 1ml of acetone + n-hexane eluent with a volume ratio of 1:1, and then rinse the packing with 5ml of ultrapure water with a resistivity greater than 18.2MΩ / cm.

[0049] ③Sampling: take 100 mL of regenerated water sample, acidify to pH=2-3, control the sample loading speed to be 4-5 mL / min, and make all the samples pass through the ...

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Abstract

The present invention belongs to the field of environment detection and analysis technology, and is the process of extracting and enriching trace nonyl phenol for sewage, regenerated water and other complicated matter and detecting quantitatively mixed nonyl phenol isomerides. The process includes the following steps: selecting hydrophilic and lipophilic balanced solid extracting column and immersible reverse adsorbent as stuffing; activating SPE column, sampling and drying; eluting SPE column with acetone, mixed liquid of acetone and n-hexane, and n-hexane successively, soaking the eluted liquid in water bath and blowing with nitrogen for constant volume; determining GC-MS parameters to obtain chromatogram of nonyl phenol; and detecting the nonyl phenol with five kinds of characteristic ions. The method of the present invention has high recovering rate, high repeatability, low detection limit, high selectivity and environment friendship.

Description

technical field [0001] The invention belongs to the technical field of environmental detection and analysis, and is applied to the detection of the total amount of trace and various isomer organic pollutants in sewage and reclaimed water. Background technique [0002] Nonylphenol is a biodegradation product of non-ionic surfactant nonylphenol polyoxyethylene ether, of which 4-nonylphenol has an environmental endocrine disrupting effect. When the concentration in river water reaches 10 μg / L, reproductive abnormalities of rainbow trout will occur. The content of 4-nonylphenol in sewage is generally only a few hundred μg / L, and due to the different structures of nonyl substituents, there are more than 10 forms of isomers. In view of the complex matrix of sewage or reclaimed water samples, the low content of target substances, many interference factors, and the difficulty of extraction, enrichment, separation and detection, the detection of 4-nonylphenol in sewage or reclaimed w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/08G01N30/86
Inventor 郝瑞霞梁鹏
Owner BEIJING UNIV OF TECH
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