电磁分选仪,对于从散开的样品中选择性地移去磁性颗粒是一种有效的工具。这种手持电磁分选仪,由一软铁探头组成,外面绕有磁性金属线,电源为9伏电池组。为方便起见,按扭开关装在探头的木柄上,以供磁性绕线通电。电流换向开关安在控制盒上,磁强可通过可变电阻器控制(图1)。从样 Electromagnetic sorters are an effective tool for selectively removing magnetic particles from diffused samples. This hand-held electromagnetic sorter, consisting of a soft iron probe, is surrounded by a magnetic metal wire and has a 9-volt battery pack. For convenience, the pushbutton switch is mounted on the probe’s wooden handle to energize the magnetic windings. The current reversing switch is located on the control box and the magnetism can be controlled via a variable resistor (Figure 1). From kind