A micro‐electrophoresis apparatus based on interferometry is described. The interferometer consists of a modified Jamin arrangement, using only one plate while the other is replaced by a reflecting cell at right angles to the beam, thereby doubling the sensitivity. A cell filling requires 0.4 ml of solution. No thermostat is provided. Details of the optical and electrical equipment are given. The apparatus may also be used for diffusion experiments.
REFERENCES
1.
2.
Electrophoresis technique employing the Rayleigh interferometer has recently been described by
H.
Svensson
, Acta Chem. Scand.
4
, 399
and
(1950
),3.
4.
Diffusion measurements using the interference method of Gouy have been described by
L. G.
Longsworth
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69
, 2510
(1947
);G.
Kegeles
and L. J.
Gosting
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69
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),For the method mentioned here, see Labhart, Lotmar, and Schmid, Helv. Chim. Acta (to be published).
5.
Clinical experience with this instrument has been reported by
F.
Schaub
and A.
Alder
, Schweiz. Med. Wochenschr.
81
, 483
(1951
).6.
Manufacturer: Kern and Company, Ltd., Aarau, Switzerland. USA distributors: The Kern Company, 5 Beekman Street, New York 38, for Connecticut, Delaware, District of Columbia, Florida, Georgia, Maine, Maryland, Massachusetts, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, South Carolina, Vermont, Virginia; the U.S. Aloe Company, 5655 Kingsbury, St. Louis 12, Missouri, for all other states.
7.
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© 1951 American Institute of Physics.
1951
American Institute of Physics
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