[Instrument Introduction]
Industrial formaldehyde solutions are divided into three specifications based on their content: 37%, 44%, and 50%. Due to their instability and easy polymerization, it is difficult to determine. The common methods of measurement include gas chromatography analysis and chemical titration. This article mainly introduces the methods ofAnalysis of Methanol Content in Industrial Formaldehyde by Gas ChromatographyConfiguration, operating methods, operating conditions, etc. The instrument shall comply with the national standard GB/T 9009-2011 Industrial Formaldehyde Solution
[Instrument Configuration]
Product Name, Model, Specification, and Description
Gas chromatograph GC2020 FID detector, packed column injection system/capillary injection system
Chromatography workstation dual channel (computer, printer self equipped)
Methanol chromatography column
High purity hydrogen generator HK-3 hydrogen flow rate 300ml/min
Oil free air generator AK-2 air flow rate 2000ml/min
High purity nitrogen gas cylinder
Standard solution: methanol ethanol (internal standard)
[Chromatographic conditions]
Chromatography column: Methanol chromatography column
Column temperature: 120 ℃.
Detector: 150 ℃.
Gasifier: 150 ℃.
Gas carrying capacity: 35mL/min
Injection volume: 1ul

[Standard Preparation of Methanol]
Add 0.16mL, 0.47mL, 0.80mL, 1.10mL, and 1.4mL of methanol to 5 25mL volumetric flasks, weigh to the nearest 0.0001g, add 0.5mL anhydrous ethanol, dilute with water to the mark, and mix well
In a 25mL volumetric flask of known mass, add a certain amount of sample. The amount of sample added is calculated based on the formaldehyde content after dilution, which is between 18% and 25%. Weigh to the nearest 0.0001g, add 0.5mL of ethanol, weigh to the nearest 0.0001g, dilute with water to the limit, mix well, and obtain the sample solution
After stabilizing the instrument, take 1uL of the sample solution with a microinjection and inject it for analysis
Advantages of after-sales service
Our company sellsAnalysis of Methanol Content in Industrial Formaldehyde by Gas ChromatographyAccording to relevant national laws and regulations Implement product repair, replacement, and return packages The instrument and equipment are uniformly guaranteed for one year, with lifelong maintenance and upkeep Free installation and debugging Train operators Receive user feedback and respond promptly If necessary, promptly come to the door to solve the problem