arsenious


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ar·se·ni·ous

(ar-sēn'ē-ŭs),
Arsenic (adj.).
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Izumi Nakai, professor of analytical chemistry at the Science University of Tokyo, conducted a test with an advanced instrument called the Spring Eight, which he said showed that arsenious acid found in the defendant's house is the same as the poison in the curry.
Masumi is accused of putting arsenious acid, one of the most toxic types of arsenic, into curry that was served at the July 25 festival in the Sonobe district of Wakayama, western Japan.
Many methods for assessing urinary iodine exist (3-8), most based on the Sandell-Kolthoff reaction (9), in which iodide catalyzes the reduction of ceric ammonium sulfate (yellow) to the colorless cerous form in the presence of arsenious acid.
Masumi is accused of putting arsenious acid, one of the most toxic types of arsenic, into the curry that was served at the summer festival in the Sonobe district of Wakayama, western Japan.
It involved precipitation of serum proteins with their protein-bound thyroxine, washing the precipitate to remove inorganic iodine, wet digestion with chromic acid to convert thyroxine iodine to inorganic iodide, distillation of released iodine into a receiver, and measurement of that iodine by its catalytic reduction of ceric ion by arsenious acid.
6 -- Police announce arsenic used to poison curry contained either arsenious acid or an arsenious acid compound.
Arsenious acid solution (100 [micro]L) was added to the wells and mixed; 50 [micro]L of ceric ammonium sulfate solution was then added quickly (within 1 min), using a multichannel pipette (Finnpipette Varichannel; Labsystems).
One commonly used method, their "Method A," is based on an initial mild chloric acid digestion to remove interfering substances, after which the iodine is quantified by its catalytic effect on reducing yellow ceric ion to colorless cerous ion in the presence of arsenious acid (Sandell-Kolthoff reaction).