Word: polarograph
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Dates: during 1930-1939
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...Polarograph is the device's name; quick, precise qualitative and quantitative chemical analysis is its purpose. It can tell the nature and constituents of a substance in from three to five minutes. It can detect substances dissolved in one million times their volume of water, and can do this with just two drops of the solution. It can detect the relative amounts of almost identical substances in a mixture, as fumaric and maleic acids. It can detect minute traces of poisonous adulterants of alcohol and ether, natural and synthetic vinegar, normal and abnormal urine. Professor Heyrovsky, who has been...
...column of mercury which flows by separate drops (two to three seconds apart) into the substance to be analyzed. The current which flows through the system increases steadily by definite increments. Substances react in a regular way to the current. By means of a mirror galvanometer, the polarograph marks a chart when reactions occur. Professor Heyrovsky & colleagues have prepared scores of polarograph charts. Every user of a polarograph furnishes charts of more substances. By comparing the chart of an unknown substance with available polarograph records, the investigator soon solves his analysis problem...
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