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Related Concept Videos

Sampling Methods: Sample Types01:18

Sampling Methods: Sample Types

Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...

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Phthalic Acid Ester-Binding DNA Aptamer Selection, Characterization, and Application to an Electrochemical Aptasensor
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Published on: March 21, 2018

Solventless sampling of phthalate esters.

Heather L Steele1, James K Hardy

  • 1Department of Chemistry, The University of Akron, Akron, Ohio 44325-3601, USA.

Journal of Environmental Science and Health. Part A, Toxic/Hazardous Substances & Environmental Engineering
|October 23, 2009
PubMed
Summary
This summary is machine-generated.

A new, solvent-free method uses passive sampling to detect six phthalate esters in water. This environmentally friendly approach accurately determines phthalate levels over time using thermal desorption and GC-MS analysis.

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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry

Background:

  • Phthalate esters are common environmental contaminants.
  • Accurate monitoring of phthalates in water is crucial for environmental and health assessments.
  • Traditional methods often involve organic solvents, posing environmental and safety concerns.

Purpose of the Study:

  • To develop an environmentally friendly, passive sampling method for six phthalate esters in water.
  • To validate the method's accuracy and reliability for determining phthalate concentrations over time.
  • To eliminate the need for organic solvents in phthalate analysis.

Main Methods:

  • A passive sampling device utilizing a semi-permeable membrane and Tenax TA sorbent was designed.
  • Analytes diffused through the membrane and were collected on Tenax TA.
  • Thermal desorption coupled with gas chromatography-mass spectrometry (GC-MS) was used for analyte removal and detection.
  • Time-weighted average (TWA) plots were generated to establish permeation constants and lag times.

Main Results:

  • The method demonstrated linear correlations for all six phthalate esters in TWA plots.
  • Permeation constants and lag times for each phthalate were successfully determined.
  • The developed method is solvent-free, offering an environmental advantage over traditional extraction techniques.
  • High sensitivity and accuracy were achieved in quantifying phthalate esters.

Conclusions:

  • The devised passive sampling method offers an efficient, accurate, and environmentally friendly approach for monitoring phthalate esters in water.
  • This technique eliminates the need for organic solvents, reducing environmental impact and improving safety.
  • The method's ability to determine permeation constants and lag times enhances its utility for long-term water quality monitoring.