Method for simultaneously measuring fourteen low-carbon ester compounds in air

Abstract

The invention discloses a method for simultaneously measuring fourteen low-carbon ester compounds in the air. The method comprises the following steps: 1) preparing a standard stock solution and a standard intermediate solution, accurately transferring the standard stock solution, metering he solution to a constant volume by using methanol, keeping the temperature of the solution at 4 DEG C and storing the solution in a dark place; 2) conducting the heat desorption: adding the above standard intermediate solution into a thermal desorption pipe, drying by utilizing the high-purity nitrogen, andcarrying out experiment over different thermal desorption time periods, wherein the desorption temperature of the thermal desorption pipe is 300 DEG C, and the selected heat desorption time is 2-20 mins; 3) carrying out GC-MS analysis: analyzing and measuring the standard intermediate solution through the SD-GC-MS method after the thermal desorption of the standard intermediate solution; 4) carrying out cold trap: adding the self-made standard intermediate solution into the thermal desorption pipe, drying by utilizing the high-purity nitrogen, and carrying out experiments at different cold trap temperatures. The above method does not need to use any organic solvent. Therefore, the method is more environment-friendly. The method can be used for measuring fourteen low-carbon ester compoundsat the same time, thus being convenient and efficient.

Description

technical field [0001] The invention relates to a method for measuring ester compounds in the air, in particular to a method capable of simultaneously measuring fourteen kinds of low-carbon ester compounds in the air. Background technique [0002] A large number of organic solvents are used in modern industrial production, among which esters are often used in industrial production, especially low-carbon fatty esters, which are aromatic and volatile liquids, and are compatible with various organic compounds. Good compatibility, so it can be used as a solvent for many organic compounds, and it is also the main solvent for varnishes, especially in the production of paints and pharmaceuticals. The ester compounds that are easily emitted into the environment will pass through the respiratory tract, digestion It can be absorbed through the airway and skin, produce toxic effects, cause discomfort symptoms of the human body, and cause poisoning from time to time. Long-term exposure ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for simultaneously measuring 14 kinds of low-carbon ester compounds in the air. The determination of fourteen low-carbon ester compounds is more convenient and efficient, which solves the problem that only a few kinds of ester compounds can be measured at a time in the previous method, and avoids the need to use a large amount of chemical solvents during the detection process and easily cause environmental pollution.

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