DROPPER — device for counting of drops; usually represents a tubule in the form of the pipette supplied with a cap.
It is convenient to dose drops for internal use by means of bottles droppers which on ground stoppers and inner surfaces of necks have fillets forming at appropriate turn of traffic jams channels for an effluence of liquids (fig., 1). A slow effluence of liquid from bottles the curved glass rods placed in necks of bottles facilitate so-called drop kolenets, i.e. kolenoobrazno (fig., 2). Drops for external use (ear, eye and so forth) can be dosed by means of bottles droppers with ground stoppers in the form of pipettes (fig., 3). In drugstores for counting of drops, according to the instruction GFH, use a standard kaplemer (fig., 4). Counting of drops from a kaplemer is made at free discharge of liquids.
If necessary instead of a standard kaplemer it is admissible to use pipette (see), calibrated on the corresponding liquid by weighing of 5 of its tests (on 20 drops in everyone).
Bibliography: Azhgikhin I. S. Technology of drugs, page 111, M., 1975; M at - ravyev I. A. Tekhnologiya of drugs, page 355 of M. 1971.
V. P. Kalashnikov, T. D. Semenova.