METHOD AND APPARATUS FOR PHOTOMETRIC MEASUREMENTS IN THE VISIBLE AND ULTRAVIOLET FIELD OF BIOLOGICAL LIQUORS AND OTHER LIQUIDS, ADAPTED TO PREVENT SYSTEMATIC ERRORS DUE TO POLLUTION

摘要

ABSTRACT OF THE DISCLOSUREA method and an apparatus are disclosed forfacilitating the testing of samples of liquids,especially biological liquors, with photometricmeans. In order to prevent systematic errors dueto pollution of samples when passing from a testedsample to a sample to be tested, provision is made sothat the photometric scanning is carried out on theterminal portion of the sample. Valves, preferablyelectromagnetic valves, are provided for switchingthe liquid from the test-tub containing the sampleto the tub in which the liquid is photometricallyscanned. Air jets are used to dislodge possibleresidues of previous samples and/or washing liquidsfrom the tub.