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Related Concept Videos

Atomic Absorption Spectroscopy: Lab01:21

Atomic Absorption Spectroscopy: Lab

For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
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Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...

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Updated: Jun 28, 2026

TD-DFT Guided Advanced E-Eye Sensing Technique for On-site Quantification of Fe, Cr, F, and As in the Environmental, Biological, and Food Samples
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Slurry sampling electrothermal atomic absorption spectrometry as screening method for chromium in compost.

F Laborda1, M P Górriz, J R Castillo

  • 1Analytical Spectroscopy and Sensors Group, Department of Analytical Chemistry, University of Zaragoza, Zaragoza, Spain.

Talanta
|October 31, 2008
PubMed
Summary

This study optimized electrothermal atomic absorption spectrometry (ETAAS) for total chromium analysis in compost using ultrasonic slurry introduction. Grinding improved reproducibility, making it suitable for screening composted materials.

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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry

Background:

  • Accurate determination of total chromium in compost is crucial for environmental risk assessment.
  • Conventional methods for chromium analysis can be time-consuming and require extensive sample preparation.

Purpose of the Study:

  • To develop and validate an electrothermal atomic absorption spectrometry (ETAAS) method for total chromium determination in composted materials.
  • To evaluate the impact of sample grinding and ultrasonic slurry introduction on analytical precision and accuracy.

Main Methods:

  • Ultrasonic slurry sample introduction coupled with ETAAS.
  • Investigation of sample grinding time on heterogeneity and precision.
  • Comparison with microwave-assisted digestion and certified reference materials.

Main Results:

  • Optimized procedure achieved a characteristic mass of 2.6 pg and a detection limit of 370 ng/g.
  • Increased grinding time improved reproducibility from 11% to 7%.
  • Good agreement was observed with certified reference materials and microwave-assisted digestion.

Conclusions:

  • Ultrasonic slurry ETAAS is a viable and efficient method for total chromium determination in compost.
  • Sample grinding is critical for mitigating heterogeneity and enhancing analytical reproducibility.
  • The method is suitable for screening composted materials for total chromium content.