SEDL / STP / STP1062-EB / STP18971S

Determination of Extractable Organic Halides in Soils and Oily Wastes by Pyrolysis/Microcoulometric Titration

Lieu, VT
Professor of Chemistrygraduate student, California State UniversityUniversity of California, Long BeachIrvine, Ca.Ca.

Woo, VH
Professor of Chemistrygraduate student, California State UniversityUniversity of California, Long BeachIrvine, Ca.Ca.

Pages: 9    Published: Jan 1990

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Abstract

Two pyrolysis/microcoulometric titration methods for the determination of extractable organic halides in soils and oily waste are described. The first method involves the washing of soil sample in a column packed with granular activated carbon with a dilute nitrate solution to remove interfering inorganic halides. The organic halides are subsequently determined by pyrolysis/microcoulometric titration of the sample soil-activated carbon mixture. The second method involves the extraction of soil or oily waste samples with a mixture of octanol and 1 M sulfuric acid. The organic halides are extracted into the octanol phase and then analyzed by pyrolysis/microcoulometry. The inorganic halides are removed by extraction into the aqueous phase. The second method has the advantage of extending the technique to the analysis of a broader spectrum of organic halides including polar compounds such as chloroacetic acid