The attack of the chemical cabinets is no joke. While investigating sources of polychlorinated biphenyl compounds inside the home, scientists identified airborne PCBs being emitted by kitchen cabinetry.
Many chemical molecules can exist in nature together with their mirror counterparts; like hands, two compounds can be made up of the same atoms in the same overall structure but in opposite orientations, i.e. left-handed and right-handed.
A simple ultrasound-assisted dispersive micro-solid phase extraction method based on graphite-oxide nanosorbents, followed by liquid chromatography-ultraviolet detection was developed by University of Tehran (UT) researchers for the determination of theophylline, theobromine and caffeine in tea samples.