General sample injector, gas chromatograph and combined spectrometer

摘要

The present invention discloses a general sample injector, comprising a sample injection port mechanism, a sample injector shell, a vaporizing chamber, a heater, a temperature control unit, a carrier gas channel, a septum purge channel, a flow splitting channel, a coolant channel, a multichannel flow control valve and a temperature control unit. The general sample injector, equivalent to a “programmed temperature vaporizer” injector combining splitting/no splitting with cold column head sample injection, gives full play to the advantages of various sample injection modes, overcomes a plurality of disadvantages, and has higher practicability and better flexibility.

主权项

1. A sample injector, comprising:
a sample injector shell; a vaporizing chamber located in the sample injector shell; a sample injector shell opening and a detachable end cover arranged at the top of the sample injector shell, the detachable end cover sealing the sample injector shell opening; a vaporizing chamber opening arranged at the top of the vaporizing chamber, wherein a channel for enabling a gas to pass is reserved between the vaporizing chamber opening and the end cover; a carrier gas channel, a septum purge channel and a coolant channel further arranged in the sample injector shell around an outer circumference of the vaporizing chamber, a carrier gas channel opening portion and a septum purge channel opening portion being respectively arranged at the tops of the carrier gas channel and the septum purge channel, and both the carrier gas channel opening portion and the septum purge channel opening portion being in communication with the vaporizing chamber opening; wherein the carrier gas channel is provided with a carrier gas inlet, the septum purge channel is provided with a septum purge channel outlet, and the coolant channel is provided with a coolant inlet and a coolant outlet; wherein the septum purge channel and the carrier gas channel are configured to flow the gas in opposite directions within the sample injector shell; a capillary column arranged at the bottom of the vaporizing chamber, one end of the capillary column projecting into the vaporizing chamber, and the other end of the capillary column projecting out of the sample injector; and one or more heaters further arranged in or on the sample injector shell.