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IMPROVEMENT OF THE MICROCOULOMETRIC TITRATION METHOD ANALYTICAL CHARACTERISTICS FOR A DETERMINATION OF CHLORIDE COMPOUNDS IN PETROLEUM PRODUCTS

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Author(s): Pavlina Ivanova | Zara Aneva

Journal: Petroleum and Coal
ISSN 1337-7027

Volume: 48;
Issue: 3;
Start page: 20;
Date: 2006;
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Keywords: chloride compounds | petroleum products | microcoulometric titration

ABSTRACT
Using a microcoulometric titration system 120 Dohrmann, provided with automated modules for sampling, reliable procedures for determination of chloride compounds in liquid petroleum products – reformats, catalytically cracked gasoline, virgin naphta, diesel oils, aromatic industrial hydrocarbons and hydrocarbon gaseous (0.1-5 mg.kg-1 Cl), and in polymeric products (above 1 mg.kg-1Cl) were developed. The mean recovery of chloride using chlorobenzene as standard for: products with ≤ 0.5 mg.kg-1 Cl is 99.7 %; for products with ≥1 mg.kg-1 Cl content is 93 %; for aromatic hydrocarbons is 94 %; for polypropylene is 98%. A comparison, of the results within the micro-coulometric oxidative pyrolisis method and a spectrophotometrical method with preliminary burning of samples in Wickbold apparatus was also performed.
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