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Analysis of sulfur and nitrogen odorants using solid-phase microextraction and GC-MS
M Turkmen1, S K Dentel, P C Chiu
1Department of Civil and Environmental Engineering. University of Delaware, Newark, DE 19716, USA.
Summary
This study presents a solid-phase micro-extraction (SPME) and gas chromatography-mass spectrometry (GC-MS) method for analyzing biosolids odors. The technique accurately quantifies low levels of key odor compounds in wastewater sludge.
Area of Science:
- Environmental Chemistry
- Analytical Chemistry
- Wastewater Treatment
Background:
- Biosolids odors pose significant environmental and public nuisance challenges.
- Accurate quantification of odor compounds is crucial for effective odor management strategies.
Purpose of the Study:
- To develop and validate a sensitive analytical method for quantifying odor-causing compounds in biosolids.
- To analyze specific volatile organic compounds responsible for biosolids odor.
Main Methods:
- Solid-phase micro-extraction (SPME) for sample preparation.
- Gas chromatography-mass spectrometry (GC-MS) with selective ion monitoring (SIM) for quantification.
- Analysis of key odorants including sulfides and amines.
Main Results:
- Quantification of parts-per-billion levels of odorant vapors from anaerobically digested sludge.
- Development of a SIM-based MS method for accurate odorant identification and quantification.
- Discussion of calibration considerations for static and dynamic sampling.
Conclusions:
- The SPME-GC-MS method provides a reliable approach for analyzing biosolids odors.
- Practical detection limits are influenced by calibration curve characteristics, particularly under static sampling.
- This method aids in understanding and mitigating odor issues in wastewater treatment.