Extraction purifying measuring method of polycyclic aromatic hydrocarbons in soil
A technology for polycyclic aromatic hydrocarbons and a determination method, which is applied in the field of extraction, purification and determination of polycyclic aromatic hydrocarbons in soil, can solve the problems of long extraction time, large quantitative error, high cost, etc., and achieves short extraction time, fast analysis speed, and low detection limit. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0027] The invention is used to sample and analyze polycyclic aromatic hydrocarbons in the wasteland surface soil near a thermal power plant in Shanghai.
[0028] The obtained soil samples were placed in a dark place to dry naturally. Weigh 200 g of the air-dried soil sample, grind it, and pass through a 200-mesh sieve. Accurately weigh 5.0 g of the sieved sample with an electronic balance, mix it with 5.0 g of anhydrous sodium sulfate, measure 25 mL each of chromatographically pure acetone and n-hexane with a graduated cylinder, and mix it evenly to make an extractant. An automatic Soxhlet apparatus was used for extraction, the temperature of the heating plate was 200°C, hot leaching for 40 minutes, rinsing for 40 minutes, and solvent recovery for 3 minutes. The solvent of the extract was replaced with cyclohexane, and concentrated to 1-2 mL.
[0029] Prepare 5.0g of activated silica gel and 20mL of dichloromethane to make a silica gel slurry, place it in a chromatographic ...
Embodiment 2
[0032] The invention is used to sample and analyze the polycyclic aromatic hydrocarbons in the surface soil of the green belt in the urban area of Shanghai.
[0033] The obtained soil samples were placed in a dark place to dry naturally. Weigh 400 g of the air-dried soil sample, grind it, and pass through a 200-mesh sieve. Accurately weigh 20.0g of the sieved sample with an electronic balance, mix it with 20.0g of anhydrous sodium sulfate, measure 50mL each of chromatographically pure acetone and n-hexane with a graduated cylinder, and mix it evenly to make an extractant. An automatic Soxhlet apparatus was used for extraction, the temperature of the heating plate was 200°C, hot leaching for 70 minutes, rinsing for 70 minutes, and solvent recovery for 5 minutes. The solvent of the extract was replaced with cyclohexane, and concentrated to 1-2 mL.
[0034] Make a slurry of 10.0g of activated silica gel and 30mL of dichloromethane, place it in a chromatographic column (400mm×...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com