Environmental Quality Monitoring & Analysis, - Vol 2 | 3. Analyte Losses in Chemical Analysis by Abraham | Learn Smarter
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3. Analyte Losses in Chemical Analysis

The chapter explores the critical aspects of quality control and quality assurance in environmental analysis, emphasizing the significance of minimizing analyte losses during sample collection, storage, and analytical processes. Key focus areas include understanding the causes of analyte loss such as volatilization, reaction, and adsorption, as well as the methodologies to improve measurement accuracy through recovery analysis and the use of blanks. Overall, the chapter provides essential strategies for analysts to enhance the reliability of environmental testing outcomes.

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Sections

  • 1

    Environmental Analysis: Quality Control – Part 3

    This section discusses the critical aspects of quality control in environmental chemical analysis, focusing on analyte losses and the methodologies to measure and mitigate these losses.

    Learning Practice

  • 2

    Analyte Losses In Chemical Analysis

    This section discusses various processes that lead to analyte losses during chemical analysis, emphasizing the significance of preventing these losses to ensure accurate environmental monitoring.

    Learning Practice

  • 2.1

    Transportation Of The Sample

    This section addresses the critical aspects of sample transportation in environmental analysis and the potential analyte losses that can occur during this phase.

    Learning Practice

  • 2.2

    Storage Of The Sample

    This section discusses the importance of proper sample storage to prevent analyte losses in environmental analysis.

    Learning Practice

  • 2.3

    Processing Of The Sample

    This section discusses the significance of managing analyte losses during environmental sample analysis and outlines key procedures for quality control and assurance.

    Learning Practice

  • 2.4

    Analytical Instrument Issues

    This section covers the critical issues surrounding analyte losses during environmental sample analysis, detailing methods for quality assurance and control in laboratory settings.

    Learning Practice

  • 3

    Common Processes Resulting In Analyte Losses

    This section discusses the various processes that can lead to analyte losses during environmental sample analysis, including transport, storage, and processing methods.

    Learning Practice

  • 3.1

    Volatilization

    Volatilization is a significant process affecting analyte loss in environmental sample analysis, primarily through evaporation and the dynamics of air contact with samples.

    Learning Practice

  • 3.2

    Reaction With Other Entities

    This section discusses the significance of analyte losses during environmental analysis due to various reactions and interactions with other entities in the system.

    Learning Practice

  • 3.3

    Adsorption

    This section explores the role of adsorption in analyte loss during chemical analysis, with a focus on environmental samples.

    Learning Practice

  • 4

    Quality Control Measures

    This section details the quality control measures necessary for accurate analytical results in environmental analysis, focusing on analyte losses during the sampling process.

    Learning Practice

  • 4.1

    Sample Collection And Storage Design

    This section explores methods to minimize analyte loss during sample collection, storage, and analysis, ensuring environmental data accuracy.

    Learning Practice

  • 4.2

    Measurement Of Analyte Loss

    This section discusses the processes and factors affecting the loss of analytes during environmental sample analysis.

    Learning Practice

  • 4.2.1

    Recovery Efficiency

    This section covers the importance of recovery efficiency in environmental analysis, highlighting the potential losses of analytes during sample handling and how to estimate these losses.

    Learning Practice

  • 4.2.2

    Laboratory Control Sample

    This section discusses laboratory control samples in the context of environmental analysis, focusing on the importance of quality control and the methods used to ensure accuracy in measuring analyte concentration.

    Learning Practice

  • 4.2.3

    Surrogate Standard

    The Surrogate Standard section discusses the importance of surrogate standards in environmental analysis, focusing on their use to estimate analyte loss and control quality in analytical processes.

    Learning Practice

  • 4.2.4

    Matrix Spike

    The section discusses matrix spikes, a quality control method for assessing analyte recovery in environmental analysis.

    Learning Practice

  • 5

    Handling False Negatives And Positives

    This section examines how false positives and negatives can occur during environmental analyses, emphasizing the importance of accuracy in measurement and quality assurance.

    Learning Practice

  • 5.1

    False Negatives

    This section discusses false negatives in environmental analysis, focusing on analyte losses that lead to underestimation of pollutant concentrations.

    Learning Practice

  • 5.2

    False Positives

    This section discusses the phenomenon of false positives in environmental analysis, specifically focusing on the sources of sample gain and their impact on analytical results.

    Learning Practice

  • 6

    Troubleshooting And Summary Of Qa/qc Procedures

    This section covers the key points related to quality assurance and control in environmental analysis, emphasizing the importance of minimizing analyte losses during sampling, transportation, and analysis.

    Learning Practice

  • 6.1

    Different Kinds Of Blanks

    This section discusses various types of analyte losses during chemical analysis in environmental monitoring, including understanding the causes and solutions to mitigate them.

    Learning Practice

  • 6.2

    Summary Of Qa/qc Procedures

    This section outlines the essential quality assurance (QA) and quality control (QC) procedures necessary for accurate environmental analysis, emphasizing analyte loss prevention and measurement accuracy.

    Learning Practice

References

16.pdf

Class Notes

Memorization

What we have learnt

  • Minimizing analyte loss is ...
  • Analytical procedures must ...
  • Common causes of analyte lo...

Final Test

Revision Tests