A simple apparatus for the application of material to papter strips for chromatography

NOTES

252

A simple apparatus for the for

application

of

material

to

paper

strips

chromatography

In the course of investigations requiring the application of large numbers of samples to paper strips for chromatography, no previously described method has been found satisfactory for holding and drying the strips during sample application. The following apparatus has been extremely useful over a period of several years’ trial and is described herein with the hope that it may be of some value to other investigators faced with a similar problem. The basic requirements are a block of wood with two holes drilled in it at right angles to each other, a few pieces of thin flat aluminum, and an aluminum tube. The construction of the apparatus is apparent from Fig. I. A common laboratory heat

I

J

Fig. I.

gun fits into the open end of the aluminum tube (D) to provide either warm or cold forced air which goes through the wooden block (A) directly to the underside of the paper strip (shown in place in the upper left hand figure) and out through the open sides between the aluminum plate (C) and’the block. The paper strip is held in place underneath the aluminum plate by adjustable side pieces of aluminum (B) to allow the use of differing widths of paper. A nonconducting hand rest of wood or paper can be placed over the top of the aluminum plate to facilitate application of the material if necessary. A damper of thin aluminum (E) is also used to control the flow of air to the paper. Division of Endocrinology, De$artmevzt of Medicine, Ukversity of Oregogt MedicaL School, Portland, Oreg. (U.S.A.)

MONTE

A. GREER

Received January zSth, 1963 J.

CAvonzalog.,

12

(1963)

252