Application of a computer-based chromatograph for automated water pollution analyses

Area of Science:

• Environmental Chemistry
• Analytical Chemistry

Background:

• The Safe Water Drinking Act mandates large-scale monitoring of drinking water quality.
• Traditional methods for analyzing volatile organics in water require large sample volumes and extensive processing.
• There is a need for simplified, efficient methods for routine monitoring of low molecular weight organics in water.

Purpose of the Study:

• To develop and validate a simplified, automated head-space analysis technique for monitoring low molecular weight organics in drinking water.
• To adapt the method for routine use in compliance with regulatory requirements.
• To assess the applicability of the automated procedure for various water matrices.

Main Methods:

• Modified head-space analysis coupled with thermal extraction and Tenax-GC adsorption.
• Gas chromatography for separation and detection of volatile organics.
• Automation of sample collection, data acquisition, and reduction processes.

Main Results:

• The technique allows for the analysis of volatile organics in the low parts-per-billion range using 1 liter or less of tap water.
• The automated procedure simplifies sample handling and data processing, making it adaptable for routine monitoring.
• The method is suitable for analyzing drinking water, industrial effluents, and wastewater treatment processes.

Conclusions:

• The automated head-space analysis technique is an efficacious tool for studying and monitoring low molecular weight organics in drinking water.
• The simplified and automated procedure reduces the need for extensive personnel experience and large sample volumes.
• This methodology supports regulatory compliance and broad application in environmental quality control.