Methods for Measuring Total Organic Chloride Concentrations in Soil as Inorganic Chloride Concentrations Using UV Irradiation and Ion Chromatography
✍ Scribed by Weon Joon Lee; Seung-Hyun Kim
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 70 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0026-265X
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✦ Synopsis
Measuring the concentration of total organic chlorides (TOCls) is very difficult due to their variety; some specific compounds have been analyzed using gas chromatography to evaluate soil contamination. Therefore, a simple analytical method was evaluated to measure total TOCl concentrations in soil around industrial districts. In measuring TOCls, accuracy and simplicity could be attained by using ion chromatography (IC) instead of gas chromatography/mass spectrometry. The TOCls from soil samples were extracted by ultrasonic and Soxhlet extraction using hexane for solvent, and ultraviolet (UV) irradiation was applied to the extracted solutions. The organic chlorides were dissociated from the organic compounds and remained as inorganic chloride ions. After evaporation of the organic portion from the sample solution, deionized water was added, and inorganic chloride concentrations in the added water were directly measured using IC. According to the recovery test using model compounds, the recovery rates were high. It can be concluded that this analytical method can be applied to measure TOCl concentrations with high accuracy. From the analytical results for soil samples taken around industrial districts, this method has high reappearance, which indicates that the suggested method is very reliable.