The organic analysis of potable waters / by J. A. Blair.

  • Blair, J. A. (James Andrew)
Date:
1890
Catalogue details

Licence: Public Domain Mark

Credit: The organic analysis of potable waters / by J. A. Blair. Source: Wellcome Collection.

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

    58/136 (page 46)
    Table XY Experiments showing that Concentration of an Organic Solution does not hasten Oxidation in the Presence of Sulphuric Acid and Permanganate. For these experiments it was convenient to use Edinburgh City water^ because it is a peaty water, and, beyond a certain point, its organic matter is only slowly oxidised in the heat by acid and permanganate, possibly the cellulose in peaty waters is only slightly oxidised by permanganate. Strength of solutions the same as in Table XI. For every quarter-litre of water used 10 c.c. of per- pianganate solution were added, therefore when half a litre was used 20 c.c. of permanganate solution were added. 1 1 Date. 1 Quantity of Volume Duration Oiveen Oxygen used water. reduced to of boiling. absorbed. per i litre. i 1888. Millig:. ’ Dec. 20 1 i litre aq. dest. 60 c.c. 1 hour 0-28 — ; 20 „ Edin.water li hours 1-73 (1-73—0-28) = 1'45 millig. » 18 \ litre „ Scarcely reduced 1 hour 2-85 1-42 „ „ 19 if 1 „ 302 1-51 „ Note.—Distilled water prepared as in Table XI