CPC G01N 31/12 (2013.01) [G01N 31/10 (2013.01)] | 4 Claims |
1. An instrument for elemental analysis comprising:
a combustion tube that has a sample injection port with an open top and is for combusting a liquid sample therein;
a sample injection mechanism having a nozzle and a slider, the nozzle being for injecting a sample into the combustion tube, the slider being configured to slide between a first position and a second position above the combustion tube, the sample injection mechanism being configured so that the sample injection port of the combustion tube is sealed in a state where the slider is positioned at the first position, and the sample injection port is unsealed and the nozzle is positioned above the sample injection port in a state where the slider is positioned at the second position;
a carrier gas supply flow path communicating with inside of the combustion tube to supply carrier gas into the combustion tube;
a pressure sensor that detects pressure in the carrier gas supply flow path;
a detector for detecting components in sample gas flowing out of the combustion tube; and
an arithmetic part configured to determine an abnormality degree of a state in a system between the combustion tube and the detector based on a change in pressure, which is detected by the pressure sensor, at the time when the slider of the sample injection mechanism slides from the first position to the second position.
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