Shiseido Company, Limited

Yuki Togashi

Osamu Shirota

Aya Ohkubo

A sample injection apparatus and a liquid chromatography apparatus including the sample injection apparatus are provided. The sample injection apparatus includes a sampling vessel into which a sample is supplied, a sampling needle for aspirating and ejecting the sample, a cleaning part into which a cleaning liquid for cleaning at least the sampling needle is supplied, a sample injection part for injecting the sample ejected from the sampling needle into a moving liquid, and a needle transfer part for transferring the sampling needle among the sampling vessel, the cleaning part and the sample injection part, wherein the cleaning part includes an ultrasonic vibrator for generating an ultrasonic wave in the cleaning liquid.

Sample injection apparatus and liquid chromatography apparatus having the sample injection apparatus

A sample injection apparatus and sample injection method capable of sufficiently reducing carry-over, having simple cleaning means for a short cleaning time period, a small influence of vibration of the cleaning means, and a small error in the amount of injected sample and preventing the durability of a sampling needle from being lowered, and a liquid chromatography apparatus having the sample injection apparatus are provided. The sample injection apparatus has a sampling vesselinto which a sample is supplied, a sampling needlefor aspirating and ejecting the sample, a cleaning partinto which a cleaning liquid for cleaning at least the sampling needleis supplied, a sample injection partfor injecting the sample ejected from the sampling needleinto a moving liquid, and needle transfer means for transferring the sampling needleamong the sampling vessel, the cleaning partand the sample injection part, wherein the cleaning parthas an ultrasonic vibrator for generating an ultrasonic wave in the cleaning liquid.

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Yokohama, Japan

Yuki Togashi