A Rapid Volumetric Micro Method for Determining Arsenic

Toxicity of an organic arsenical, 3-nitro-4-hydroxyphenylarsonic acid. Residues in chicken tissues

“…Although the latter data were obtained on leg muscle and the present data from breast muscle, other experiences in our laboratory have not indicated a difference in arsenic content in the two types of muscle. Kerr et al used a different procedure, that of Cassil and Wichmann (1939). Hüni and Zanetti (1963) reported 0.56 p.p.m.…”

Polarographic Determination of Arsenic in Biological Material

“…The arsenic isolation procedure has been shown by Cassil and others (8,4) to be quantitative, but the author was not able to confirm Cassil's recovery of quantities of arsenic above 30 micrograms with his method. Losses of arsenic of about 10 per cent usually occurred when granulated zinc and the 5-minute evolution were employed.…”

“…tion of a number of improved procedures (3,4,7,8,11,12) for the microdetermination of arsenic in biological material. Although these methods are much better suited for general work than the Gutzeit procedure, they possess certain disadvantages which prompted the investigation of polarographic methods.…”

“…The polarographic method depends upon the isolation and concentration of the arsenic by the evolution of arsine and its absorption in mercuric chloride solution in a manner similar to that described by Cassil (3,4) . The mercury arsenides are changed to arsenious oxide by heating with the excess mercuric chloride, the mercury is precipitated by reduction with hydroxylamine, and the solution is then ready for the polarographic determination.…”

Some Observations on the Toxicity Effects on Bovines of Dipping in Arsenical Dips

“…The method of Cassil and Wichmann (1939) in which arsenic is generated and absorbed in mercuric chloride solution, standard iodine, in strong potassium iodide is added in excess and the excess iodine is back titrated with a standard arsenic solution was used in this experiment. A 3 mg/kg.…”