Fast determination of bisphenol A in spiked juice and drinking water samples by pipette tip solid phase extraction using cobalt metal organic framework as sorbent

Abstract

A cobalt metal organic framework was prepared with rapid ultrasound assisted method by treatment of cobalt nitrate with pyridine 2,6-dicarboxilic acid dissolved in ethanolic media and used as a sorbent for pipette tip solid phase extraction of Bisphenol A (BPA) and its determination in spiked juice and drinking water samples by HPLC. Parameters which influence extraction efficiency such as pH, sample volume, amount of sorbent, type and volume of eluent, and number of draw/eject cycles for extraction and elusion were tested and optimized. Results showed that best extraction efficiency could be obtained at pH 3, 150 µL of sample volume, 3 mg of adsorbent and 10 µL of methanol as elution solvent. Numbers of draw/eject cycles for both sample extraction and elution were 7 cycles. Limit of detection and limit of quantification of this method were 0.07 and 0.3 µg L-1 , respectively, with linear dynamic range of 0.3 to 300 µg L-1 for BPA. This method was applied successfully for determination of BPA in five spiked juices and drinking water samples.

Analysis of Toluene: Removal of toluene from the air s tream using a bed made of metal-organic frameworks adsorbent

“…Adsorbents are becoming increasingly important to meet various needs such as separation, additional applications in membranes, thin film devices, catalysis, and biomedical imaging. At a fundamental level, metal-organic frameworks show the beauty of chemical s tructures and the power of organic and inorganic chemis try [36]. Among the organometallic framework (MOF) applications, we can mention energy s torage, separation, catalytic role, and application in sensor devices.…”