Device and method for measuring content of organic impurities in food-grade carbon dioxide

• Main Authors: ZHANG BIN, ZHAO JING, YANG WEIDONG, HU ZHAN, HANG WEIWEI, ZHENG LIHONG, ZHAO XUANWEI, YANG DEFEI
• Format: Patent
• Language: Chinese; English
• Published: 26.07.2024
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to the technical field of detection of carbon dioxide, in particular to a device and a method for determining the content of organic impurities in food-grade carbon dioxide. Comprising carrier gas I, carrier gas II, CAP I, CAP II, a six-way valve I, a six-way valve II, a detector I, a detector II, a detector III, a quantitative loop I, a quantitative loop II, a chromatographic column I, a chromatographic column II, a chromatographic column III, a chromatographic column IV and a Deans Switch device, compared with the prior art, the method has the following beneficial effects that the separation capacity and selectivity of the system are improved by using a plurality of chromatographic columns connected in series through multi-dimensional gas chromatography, a target area is cut from a first-dimensional chromatographic column to a second-dimensional chromatographic column (called center cutting) by using a Deans Switch device, and the second-dimensional chromatographic column adopts differ