Detection of Trace Methanol by Gas Chromatography

Methanol has an anesthetic effect on the central nervous system and a special selective effect on the optic nerve and retina, which can cause optic nerve and retinal lesions, and in severe cases can lead to blindness. So it is necessary to monitor the methanol content in industrial wastewater to prevent excessive methanol from being directly discharged into the water environment. Referring to relevant experiments, the method of determining methanol in industrial wastewater by gas chromatography was improved, and the principle of the determination method was explained. This article uses direct injection to detect organic solvents in wastewater,

Detection of Trace Methanol by Gas ChromatographyExperimental steps:

Methanol standard solution configuration: Accurately extract 10ul of chromatographic grade methanol and place it in a 50ml volumetric flask, dilute with distilled water to the mark. Seal and store in the refrigerator.

Standard curve drawing: Accurately extract 1.0, 2.0, 3.0, 4.0, and 5.0 ml of methanol standard solution and place them in 10 ml volumetric flasks. Dilute with distilled water to the mark and prepare methanol solutions of different concentrations. Take 2ul of methanol solution separately and enter it into GC-7890 gas chromatograph, record the retention time and peak area. Quantify using the area external standard method.

Spectral diagram:

Instrument configuration list: