Monomethylamine, a downstream product of trimethylamine!

Methylamine is an important basic organic chemical raw material that is widely used in various sectors of the national economy. It serves as a fundamental ingredient in industries such as pesticides, pharmaceuticals, synthetic dyes, synthetic resins, chemical fibers, solvents, surfactants, high-energy fuels, and photographic materials. Methamine is divided into monomethylamine, dimethylamine, and trimethylamine. Monomethylamine is known in English as Methyl Amine, abbreviated as MMA ； The English name for dimethyl amine is Dimethyl Amine, abbreviated as DMA ； The English name for trimethylamine is Trimethyl Amine, abbreviated as TMA. In the field of pesticides, monomethylamine is mainly used in the production of dimethoate, monocrotophos, carbofuran, fenitrothion, leafhoppericide, aldicarb, and others ； Dimethylamine is mainly used in the production of chlorpyrifos and bispyribac-sodium ； Trimethylamine is mainly used in the production of chlormequat chloride and other similar substances. In the pharmaceutical industry, methamine can be used to synthesize a variety of drugs such as **agents, stimulants, painkillers, and antibiotics. In the field of defense chemicals, monoamine and dimethylamine are used respectively to produce high-quality liquid high-energy fuels for rockets. Dimethylamine can be used to produce the excellent solvent DMF, which is an ideal solvent for synthetic fibers and textiles such as polyacrylonitrile, polyurethanes, and polyvinyl chloride; it is also an essential solvent in the synthetic leather industry. In addition, methylamine can also be used to produce surfactants, hydrogels, feed additives, developing solutions, and other products.

I have a question~ If methanol contains trimethylamine, what methods can be used to detect it? Are there any specialized instruments or testing techniques for this purpose? Does anyone have any data on the detection and control of this substance? Please give some advice#:loveliness:

If trimethylamine is present in methanol, gas chromatography is used for analysis. (4) Principle of the method: It is determined using a gas chromatograph equipped with a FID detector. Since the FID detector cannot detect water content, this method can only detect and analyze organic compounds. If the water content of the sample is very high (such as in wastewater samples), an internal standard must be used as a reference for analysis. (5) Unit of purity: area%. If weight correction factors for each component have been set in the GC integrator’s program, the area% unit can be converted to wt.-%. (6) Instrumentation Equipment The following instruments and laboratory equipment should be used:  A laboratory gas chromatograph equipped with a FID detector and an automatic sampler.  Capillary column: “J&W® DB-1 No. 123-1063, 60 m long, inner diameter 0.32 mm” ； ; Membrane thickness: 1 μm (100% polydimethylsiloxane) Carrier gas: Argon ； Pressure 50 kPa.  Programmed temperature rise: 50 °C (10 min) – 10 K/min to 200 °C  Liquid injection valve: split ratio of 1:100; 150 °C  FID detector: 250 °C; sensitivity: 3.2×10-4; range 5  Automatic integration and calculation system  Sample vials with seals for the GC auto-injector  Suction tube or syringe (7) Reagents: Water sample internal standard (such as ethanol, propanol-1) (8) Sample preparation: No sample treatment is required for samples with low water content (< 10 wt.-%) and low evaporation residue content (< 1 wt.-%).  For samples with a high content of evaporative residues (such as wastewater from the catalyst separation section), distillation must first be carried out according to Method C1-0-4-009, and the distillate should then be used as the sample. The amount of evaporation residue must be included in the calculation of the final GC results.  For samples with a high water content (> 10 wt.-%), an internal standard (such as ethanol) must be added to the sample. The type and quantity of internal standards added depend on the sample and column type, which will be discussed later.  Add the sample to a small sample vial, seal it, and place it in the GC auto-sampler. (9) Preparation of GC  The automatic laboratory gas chromatograph must be prepared in accordance with the manufacturer’s instructions.  Select and initiate the specific analysis method.  The GC must display “Ready”. (10) Measurement steps  Start automatic analysis. .  After the program is completed, record the test results for each component. (11) Calculation: No calculation is needed. The calculations are automatically performed by the analyzer control system.