The crystal structure of the room-temperature ferroelectric phase of pyridinium periodate [C6H5NH]+[I04]has been determined by X-ray diffraction as orthorhombic, space group Cmc2i with a = 8.347(2), b = 7.270(2), c = 12.732(3) A and Z = 4. It was refined to/?l =0.0281 wR2 = 0.0762 for 389 absorption-corrected reflections. The structure comprises isolated I0 4 tetrahedra linked together by disor...

The photoactivated periodate (UV/IO4−) process is used to investigate the degradation of acid orange 10 (AO10) dye. photodecomposition ions produces highly reactive radicals (i.e., •OH, IO3•, and IO4•) that accelerate dye degradation. Increasing initial concentration 3 mM enhances removal rate, but over periodate, rate slows down. On contrary, increasing concentrations reduces performance. pH m...

During the development of an assay for the metanephrines (m 0 -methylepinephrine and m 0 -methylnorepinephrine) in human urine (I), another compound was detected which had similar chemical and chromatographic properties. Like the metanephrines, it was adsorbed onto a weak cation exchange resin, and upon treatment with periodate it yielded a product which absorbed ultraviolet light. The identifi...