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The analytical blank: sources and effects on lead analyses
Journal - Association of Official Analytical Chemists
|July 1, 1982
Summary
Analytical blanks significantly impact quantitative analysis reliability, especially at low concentrations. Lead contamination from lab environments and equipment often dictates blank levels and variability.
Area of Science:
- Analytical Chemistry
- Environmental Science
Background:
- The analytical blank is critical for the reliability of quantitative analyses.
- High blank levels and associated uncertainty limit detection at lower concentration levels.
Purpose of the Study:
- To investigate the influence of analytical blanks on quantitative analysis.
- To identify and quantify sources of lead contamination affecting analytical blanks.
Main Methods:
- Discussion of specific lead contamination sources.
- Presentation of data on contributions from various sources.
Main Results:
- The magnitude of the blank and its uncertainty are key limitations for low-level quantitative analysis.
- Lead contamination from the laboratory environment, equipment, and materials are primary contributors to blank levels and variability.
Conclusions:
- Minimizing lead contamination from laboratory sources is essential for improving analytical reliability.
- Understanding and controlling analytical blanks are crucial for accurate low-level quantitative measurements.