Standard sample positioning device of spark direct-reading spectrometer

The utility model discloses a standard sample positioning device for a spark direct-reading spectrometer, which is mainly suitable for standard samples in regular cylinder shapes and comprises a base, a support rod, an L-shaped rod and a sample ferrule. The supporting rod is installed in the middle of the base and is hollow, a groove is formed in the middle of the supporting rod in the vertical direction, the L-shaped rod is sleeved with the supporting rod, the transverse part of the L-shaped rod is located in the groove and can move up and down, and when the transverse rod is located at the bottom end of the groove, the top end of a vertical rod of the L-shaped rod is higher than the upper edge of the supporting rod, so that a sample is conveniently lifted. And a telescopic clamping position is arranged on a transverse rod of the L-shaped rod. One end of a cross rod of the L-shaped rod is connected with a sample ferrule, the ferrule is divided into a left semi-ring and a right semi-ring, one ends of the two