Systems and methods for injection monitoring and diagnostics for gas chromatography

An injection monitoring system for a gas chromatography system, the injection monitoring system comprising:

• one or more processors;
• and
• memory storing executable instructions that, when executed by the one or more processors, cause a computing device to perform a process comprising:
• obtaining flow control data from a flow control system included in the gas chromatography system and configured to regulate, based on a flow control parameter, flow of a fluid through an inlet of the gas chromatography system, wherein:
• the flow control system comprises:
• a pressure sensor that measures inlet pressure;
• a valve that regulates flow of the fluid into or out of the inlet;
• and
• a flow controller that receives pressure signals output by the pressure sensor and outputs, based on the pressure signals, a pulse width modulated (PWM) valve drive signal to the valve;
• and
• the flow control data is representative of a measure of the flow control parameter over time during a time period encompassing injection of a sample into the inlet;
• determining, based on the flow control data, that the injection was unsuccessful;
• and
• directing, based on the determination that the injection was unsuccessful, the gas chromatography system to perform a mitigation operation to mitigate the unsuccessful injection of the sample.

A non-transitory computer-readable medium storing instructions that, when executed, direct at least one processor of a computing device for a gas chromatography system to perform a process comprising:

• obtaining flow control data from a flow control system configured to regulate, based on a flow control parameter, flow of a fluid through an inlet of a gas chromatography system, wherein:
• the flow control system comprises:
• a pressure sensor that measures inlet pressure;
• a valve that regulates flow of the fluid into or out of the inlet;
• and
• a flow controller that receives pressure signals output by the pressure sensor and outputs, based on the pressure signals, a pulse width modulated (PWM) valve drive signal to the valve;
• and
• the flow control data is representative of a measure of the flow control parameter over time during a time period encompassing injection of a sample into the inlet;
• determining, based on the flow control data, that the injection was unsuccessful;
• and
• performing, based on the determination that the injection was unsuccessful, a mitigation operation.