Patent ID: 9003868
Filing Date: 2015-04-14
Classification: G01N

Abstract:
1. A sample introducing apparatus configured to introduce a sample into a liquid chromatograph equipped with a liquid feeding unit to deliver an eluent, a separation column to receive said eluent and the sample, and a detector to detect said sample supplied from said separation column, said sample introducing apparatus comprising an analytical flow path, wherein said analytical flow path comprises: a sample introduction flow path having a needle configured to suction said sample, and a sample injection port in fluid communication with one end of a sample delivery pipe; a sample flow path switching device connected to said sample introduction flow path and configured to switch the flow path of said sample, wherein the sample flow path switching device switches a first flow passage and a second flow passage, wherein the first flow passage connects said needle, a sample sucking unit, and a sample retention unit, and the second flow passage connects said liquid feeding unit, said needle, said sample retention unit, said separation column, and said detector, and wherein said sample sucking unit sucks up the sample through the needle, and the sample retention unit retains the sucked sample temporarily; and a trap column injection valve configured to switch the flow paths of the eluent and the sample, wherein the other end of said sample delivery pipe is in fluid communication with a port of said trap column injection valve such that said sample injection port and said trap column injection valve are in direct fluid communication with each other without passing through said sample flow path switching device.