A new constant temperature gas phase spectrometer

Abstract

The invention discloses a novel constant-temperature gas chromatograph. Small gas collection pistons are connected with test bottles through gas guide pipes, a large gas collection piston is connected with the small gas collection pistons through a ten-way valve, a gas inlet is arranged on the large gas collection piston and connected with a gas chromatograph body through a gas guide pipe, pressure sensors are arranged in the small gas collection pistons, electric valves are arranged in the large gas collection piston and the small gas collection pistons, and the pressure sensors, the gas chromatograph body and the electric valves are connected with a computer through leads. According to the constant-temperature gas chromatograph, pressure change in the gas collection pistons can be monitored by the internal pressure sensors in real time, a time-pressure curve can be generated by the computer, the passing amount of gas can also be controlled by controlling opening and closing of the electric valves by the aid of the computer, a thermostat, the test bottles and the gas chromatograph body are directly connected, previous troubles in the operation process are eliminated, errors are reduced, and the collected gas can be more accurate.

Description

technical field [0001] The invention belongs to the technical field of gas phase spectrometry, and in particular relates to a novel constant temperature gas phase spectrometer. Background technique [0002] Gas phase spectrometers are widely used in petroleum, chemical industry, biochemistry, medicine and health, food industry, environmental protection, etc. In addition to quantitative and qualitative analysis, it can also determine the physical and chemical constants such as distribution coefficient, activity coefficient, molecular weight and specific surface area of ​​the sample on the stationary phase. Generally speaking, the gas phase spectrometer not only requires pure carrier gas, good airtightness, stable flow rate and accurate flow rate measurement, but also requires a good constant temperature effect. However, the current gas phase spectrometer is cumbersome to operate and has large errors. The constant temperature effect is not ideal, and the measurement accuracy ...

AI Technical Summary

Problems solved by technology

Generally speaking, the gas phase spectrometer not only requires pure carrier gas, good airtightness, stable flow rate and accurate flow rate measurement, but also requires a good constant temperature effect. However, the current gas phase spectrometer has troublesome operation process and large errors. The constant temperature effect is not ideal, and the measurement accuracy is relatively low, which cannot meet the requirements of high precision and high constant temperature.

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