Nature-Friendly Method Found in Iran to Detect Tiny Organic Pollutants in Aqueous Samples

News Date : 2016-07-10 Visit : 483

Iranian researchers presented a new method for the accurate measurement of little amounts of chlorophenols

TEHRAN (INIC)- Iranian researchers presented a new method for the accurate measurement of little amounts of one of the most important water pollutants, chlorophenols.

The method is based on a nanosorbent and can be used as an environmentally-friendly detection method.

Chlorophenols are a group of toxic and colorless chemicals that are fatally dangerous even at very low concentrations. The measurement of these materials has been highly important to the researchers in the past two decades. Chlorophenols are used as preservative in wood, antiseptics, pesticides and herbicides. The aim of this research was to develop a new and environmentally- friendly method to measure the amount of chlorophenols in drinking and river water.

This method increases efficiency in the measurement of chlorophenols. In addition to being eco-friendly, this method has very high sensitivity but low detection limit.

Chlorophenol compounds are first extracted into the solution inside the fibers in this method through a hallow fiber membrane. The fiber is a hallow tube made of polypropylene with a height of 1.5 cm and a diameter of 0.6 mm.

After extraction of the compounds into the solution inside the fiber, the extracted chlorophenols are absorbed by a solid nanosorbent installed on a wire. The extracted chlorophenols react with acetic anhydride during the sorption process, and they convert into ester derivatives. The wire-like nanosorbent is next injected into gas chromatography device by using a specific tool and the absorbed chlorophenol compounds are measured.

Results of the research have been published in Journal of Chromatography A, vol. 1418, 2015, pp. 45-53.