US 12,392,794 B2
Flow path washing method of auto sampler and flow path washing apparatus of auto sampler
Yushi Harada, Tokyo (JP); and Yuichiro Hashimoto, Tokyo (JP)
Assigned to HITACHI HIGH-TECH CORPORATION, Tokyo (JP)
Appl. No. 18/038,273
Filed by HITACHI HIGH-TECH CORPORATION, Tokyo (JP)
PCT Filed Dec. 10, 2021, PCT No. PCT/JP2021/045517
§ 371(c)(1), (2) Date May 23, 2023,
PCT Pub. No. WO2022/131153, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 2020-208705 (JP), filed on Dec. 16, 2020.
Prior Publication US 2024/0094236 A1, Mar. 21, 2024
Int. Cl. G01N 35/10 (2006.01); B08B 9/032 (2006.01)
CPC G01N 35/1004 (2013.01) [B08B 9/0325 (2013.01); B08B 2209/032 (2013.01); G01N 2035/1006 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A flow path washing method of an auto sampler, wherein
when a cleaning fluid supply mechanism supplies cleaning fluid to a flow path which is switched by a flow path switching mechanism, among a first flow path including a nozzle for aspirating a sample and a sample loop for holding the sample aspirated from the nozzle and a second flow path including a washing tub for washing at least an outer wall of the nozzle, a control unit changes a flow velocity of the cleaning fluid supplied between measurement of a first substance and measurement of a second substance based on, among washing information showing washing patterns corresponding to different measurements of substances, first washing information showing a washing pattern corresponding to the first substance, second washing information showing a washing pattern corresponding to the second substance to be measured subsequent to the first substance, and third washing information showing a washing pattern corresponding to a third substance measured before the first substance.