Gas electrode for general use / by G.S. Walpole.

  • Walpole, George Stanley.
Date:
[1913]
Catalogue details

Licence: In copyright

Credit: Gas electrode for general use / by G.S. Walpole. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    17/22 (page 423)
    Millivolts against Fig. 3. Sorensen formaldehyde titration of 4 °/o Witte peptone performed electrometrically. Note.—At C 10 cc. neutral formalin waB added. O are points obtained in the titration process—electrode containing 0'3 cc. □ are points obtained with large electrodes in separate determinations. + are points obtained colorimetrically using phenolphthalein. =#= is point obtained colorimetrically using neutral red.