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Method for determining polycyclic aromatic hydrocarbons in sludge

A technology for polycyclic aromatic hydrocarbons and sludge, which is used in measuring devices, instruments, scientific instruments, etc., can solve the problems of interfering with the determination results of polycyclic aromatic hydrocarbons, and achieve the effects of high accuracy, protection of chromatographic columns, and high analysis efficiency.

Inactive Publication Date: 2010-01-27
上海自来水投资建设有限公司
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Problems solved by technology

[0005] However, for sludge, if only the analysis method of PAHs in soil is used, there will be a large amount of organic matter, which interferes with the determination of PAHs by GC / MS

Method used

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  • Method for determining polycyclic aromatic hydrocarbons in sludge
  • Method for determining polycyclic aromatic hydrocarbons in sludge
  • Method for determining polycyclic aromatic hydrocarbons in sludge

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Embodiment Construction

[0031] Below in conjunction with embodiment further illustrate the present invention.

[0032] 1. Sample collection and storage

[0033] Sludge samples were collected from two sewage treatment plants in Taopu and Quyang, Shanghai, as shown in Table 1. They were collected using a gravity columnar sludge collector. The samples were naturally air-dried in the laboratory away from light, ground and passed through an 80-mesh sieve, sieved and placed in a sealed Store in the bag at low temperature until sample pretreatment.

[0034] 2. Sample extraction

[0035] Accurately weigh 20 grams of dried sludge sample, place the sample in the filter paper sleeve of the Soxhlet extractor, and add a mixture of dichloromethane: acetone (1:1) (v / v) in the flask of the extractor 150mL, the temperature was controlled at 65°C, and a small amount of copper powder was added to reflux for 20 hours. Cool to room temperature, filter, and concentrate to 1 mL by rotary evaporation under reduced pressu...

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Abstract

The invention is a method for determining polycyclic aromatic hydrocarbons in sludge. Basing on an analyzing method of polycyclic aromatic hydrocarbons in conventional soil which includes steps of soxhlet extraction, column chromatography and gas mass spectrometry detection, a process that concentrated sulfate is used to wash eluent is added after the column chromatography. The method of the invention can eliminate a great amount of organic compounds in sludge and reduce interferences of other organic compounds on the polycyclic aromatic hydrocarbons content detection. The sensitivity and the accuracy of the gas mass spectrometry detection on the polycyclic aromatic hydrocarbons are improved.

Description

technical field [0001] The invention relates to a method for determining polycyclic aromatic hydrocarbons in sludge. After Soxhlet extraction, column chromatography separation, solvent washing and gas phase-mass spectrometer detection, the determination of 16 kinds of polycyclic aromatic hydrocarbons in sludge can be completed and accurate results can be obtained. . Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) are a class of persistent organic pollutants with triple effects (carcinogenic, teratogenic and mutagenic), mainly present in the atmosphere, water and soil. Polycyclic aromatic hydrocarbons are produced by the incomplete combustion of organic matter and fossil fuels. There are four main causes of global polycyclic aromatic hydrocarbon pollution today: (1) smoke and dust produced by households, living stoves, and industrial boilers; and industrial processes that use tar, such as coking, petroleum cracking, coal tar refining, asphalt paving, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88G01N30/06G01N30/60
Inventor 南蓬方海兰
Owner 上海自来水投资建设有限公司
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