Showing papers on "Dibutyl phthalate published in 1991"
Journal Article•
TL;DR: In this paper, three groups of organic pollutants, polycyclic aromatic hydrocarbons (PAH), phenols and phthalates, from which a total of 24 compounds were chosen, were analyzed in soil, pig slurry, sewage sludge and in grains cropped with these fertilizers.
Abstract: Three groups of organic pollutants, polycyclic aromatic hydrocarbons (PAH), phenols and phthalates, from which a total of 24 compounds were chosen, were analyzed in soil, pig slurry, sewage sludge and in grains cropped with these fertilizers. In the pig slurry, compounds such as phenol, cresol and dibutyl phthalate were present at significant concentrations, while in the sewage sludge, high levels of phenol, cresol, nonylphenol and di-2-ethylhexyl phthalate (DEPH) were found. The analysis of the grains showed that PAH's and phenols were present at the same low concentration level independent of the fertilizer treatment. No uptake of nonylphenol through grains was detected. However, phthalates were found at somewhat higher concentrations in grains when applied with pig slurry and sewage sludge. Uptake percentages of added phthalates through grains were 0.1 to 0.2%.
17 citations
TL;DR: In this article, a reversed phase HPLC method was developed to identify and quantify plasticizers commonly used with polymers present in sustained or controlled release dosage forms, such as triethyl citrate, tributyl citrate and triacetin.
Abstract: A simple reversed-phase HPLC method was developed to identify and quantify plasticizers commonly used with polymers present in sustained or controlled release dosage forms. the plasticizers investigated included triethyl citrate, tributyl citrate, acetyl triethyl citrate, dibutyl sebacate, diethyl phthalate, dibutyl phthalate, and triacetin. the plasticizers were detected at 220 nm, the mobile phase being methanol:water (70:30 v/v%). the peak area response was linear over the studied concentration range of 0.5–5.0 mM/L for triethyl citrate, acetyl triethyl citrate, dibutyl sebacate, and triacetin, and 0.005 − 0.05 mM/L for diethyl phthalate. the recovery from solvent-cast ethyl cellulose and Eudragit RS 100 films was complete. Two pharmaceutical applications of this assay included the quantitation of plasticizers in polymer-coated sugar beads and a leaching study of a water-soluble plasticizer, triethyl citrate, from polymeric films into simulated intestinal fluids.
16 citations