Papers and Discussions

Charles A. Kohn
1894 Journal of the Sanitary Institute  
THE advances in electrolytic analysis during recent years have had reference to quantitative methods only, and the value of these latter for qualitative work has been to some extent overlooked. These methods are of special value, and can be applied with marked advantage to the detection of mineral poisons in cases of medical and medico-legal inquiries. They do not supersede the ordinary methods of qualitative analysis, but serve as a final and crucial means of identification, and thus render it
more » ... and thus render it possible to detect very small quantities of poisons with great accuracy. Amongst the chief advantages are the freedom from contamination with impure reagents and the fact that the methods can be rendered approximately quantitative whenever desired. The application of the methods to the detection of antimony, mercury, lead, copper, and cadmium has been investigated. In all cases it is possible to detect the presence of one tenthousandth part of a gramme of the metal with certainty or one part in 150,000 parts of solution, this degree of delicacy being considerably greater than it is possible to attain with the ordinary methods employed. In presence of organic matter the electrolytic methods can also be applied, the experiments made on the detection of the above metals in urine having shown very conspicuous advantages both in regard to accuracy and certainty. The PRESIDENT of the Section (Dr. Thomas Stevenson) said tl~e ' * paper was highly practical and of great importance. He observed present several experienced gentlemen, and he wuuld like to hear ' their remarks upon it. } at WESTERN OREGON UNIVERSITY on May 29, 2015 Downloaded from
doi:10.1177/146642409401500403 fatcat:7opndzqkire7hmu5wiswxv5xwy