On bedside urine-testing : a clinical guide to the observation of urine in the course of work / by Geo. Oliver.

Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: On bedside urine-testing : a clinical guide to the observation of urine in the course of work / by Geo. Oliver. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    be described, this test-paper forms a very reliable work-a-day test for albumin. Bodies precipitated.—The behaviour of the ferrocyanic test-paper on 1.he pro- teids of the urine differs from that of the mercuric; for, while this precipitates every member of the group without exception, the ferrocyanic exempts the peptones.' In this respect it must be classed with nitric acid, which detects every form of proteid except peptones. In discovering very small quantities of albumin—such as those beyond the range of nitric acid—the ferrocyanic is some- what less sharp than the mercuric test- paper ; for, while the latter reacts instantly, the former does so gradually in the course of the minute to be devoted to the observation. But, when albumin is 1 The reader will bear in mind, that experiment shows that the ferrocyanic test-paper freely precipitates peptones in mere aqueous solution, but fails to do so when u is dissolved in salt water or in urine. Kiihne has recently shown (Zcit. fur Biol Brand, xix.; that potassium ferrocyanide does not preci- pitate hemi-albumose, when there is an excess of sodium chloride, or of the reagent: inasmuch, therefore, as the test- paper or the urine does not provide that excess, the ferro- cyanic test does not exempt hemi - albumose as well as peptone from precipitation.