Abstract
Micropipettes with internal diameters of 1 to 5 μm are frequently used for manipulation of erythrocytes and leukocytes. A modified method for the production of narrow micropipettes with flat tips is described. A stainless steel rod with a cylindrical bore hole is filled with low-melting point solder glass, which is rapidly melted by a high electrical current. The tip of a micropipette of desired diameter is moved into the softened glass, the electrical current is interrupted and the glass is chilled. When the pipette is removed it usually breaks off with a flat tip.
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