2. Environmental Analysis of Organics in Water
The chapter delves into the methods for analyzing organic and inorganic chemicals in various matrices like water and sediment. It outlines the sequential steps for extracting analytes, emphasizes the importance of choosing appropriate analytical instruments, and discusses the techniques of liquid-liquid extraction and solid-phase extraction. Additionally, considerations around recovery and concentration adjustments for accurate measurements are highlighted.
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What we have learnt
- The general procedure for analyzing the concentration of chemicals involves extraction, concentration, and then analysis through an instrument.
- Liquid-liquid extraction and solid-phase extraction are primary methods for isolating analytes from aqueous samples.
- Understanding the significance of minimum detection limits and recovery rates is crucial for accurate chemical analysis.
Key Concepts
- -- Analyte
- A substance whose chemical constituents are being identified and measured.
- -- Solvent Extraction
- A process that involves transferring a solute from one solvent into another based on differential solubility.
- -- Minimum Detection Limit (MDL)
- The lowest concentration of a substance that can be reliably measured by an analytical procedure.
- -- Recovery Rate
- The percentage of an analyte that can be retrieved from a sample after it has undergone extraction.
- -- LiquidLiquid Extraction
- A method for separating compounds based on their solubility in two different immiscible liquids.
- -- SolidPhase Extraction (SPE)
- A technique that uses a solid adsorbent to extract analytes from a liquid sample.
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