FGC-1830 Methylal determination of the special gas chromatograph

scope
Acetal resin for its excellent strength, toughness, stiffness, elasticity and twist properties are widely used in auto parts, furniture, machinery, construction, medicine, toys, ornaments, and other fields and much attention.
Synthesis of acetal resin are commonly used by a dilute methanol and formaldehyde condensation of acetal, methylal oxidation in concentrated formaldehyde synthetic resin together again this process route. Meanwhile methylal is also commonly used as a resin plasticizer, hypnotics, analgesics and spices.
Methylal measurement method is as follows:
Experimental part
1.1 Instruments and reagents
Tengzhou City Teng Hai Analytical Instruments Co., GC-2001 gas chromatograph with TCD detector.
Methylal chromatography standard sample;
Methanol, formaldehyde (AR grade) in a stoichiometric ratio for the synthesis of methylal reaction mixture sample of equilibrium.
1.2 Analysis Steps
A 5ml sample reaches equilibrium mixture of test sample in centrifuge tube, placed in a 20C bath to cool the alcohol, the solid catalyst is isolated by centrifugation. Mixed sample taken for analysis to clarify the determination.
Determination of B sample
Gas chromatographic conditions Column:
Column length 2m, · an inner diameter of 4mm stainless steel column;
Column temperature: 115C;
Detector and vaporization chamber temperature: 140C;
Carrier gas: high-purity hydrogen carrier gas rate was 45ml / min.
C sample determination
With micro sample taken 0.2 called sample injection chromatography, retention time qualitative and quantitative peak area.

Features
1, The instrument uses Internet communication technologies can be easily composed LAN; Internet for long-distance data transmission, remote control, remote diagnostics, the program can be automatically upgraded.
2, all computerized key operation, 5.7-inch large-screen 13-line LCD display English, man-machine dialogue, easy to operate.
3, a new integrated digital electronic circuits, high control precision, stable and reliable performance, temperature control accuracy of up to 0.1.
4, the unique design solution inlet injector discrimination;-post compensation not only solve the baseline drift caused by temperature programming, and subtracting the background noise, you can get a lower minimum detection limits.
Large oven volume: 300 * 280 * 180 can accommodate two 80m capillary column.
5, better insulation: oven, vaporization, when the test were 300 degrees, the hottest spot outside the box and cover only 40 degrees, improve test speed, security of human safety.
6, the unique design of the vaporization chamber, smaller dead; replacement parts: septum, liner, extreme polarization, and the collector nozzle can replace with one hand; body replacement: packed column, capillary injector, TCD , FID detector requires only a wrench can be completely disassembled, maintenance is very convenient.
7, intelligent opened the door and out of the system infinitely variable air volume, reducing the program up / cool down after the system is stable equilibrium time.
8, which can install two injection systems: packed column capillary split / splitless injection system (having a membrane cleaning function); can also install two identical or different detectors: a FID, TCD, ECD, FPD detection device. Optional automatic / manual six-way gas sampling valve injector, headspace sampler, thermal desorption injector, the injector cracking furnace, methane reformer.
9, start with a powerful and comprehensive self-diagnostic function, visual display fault information, power storage protection, keyboard lock and power supply with anti-interference function mutation.

Technical Parameters
1, temperature range: room temperature ~ 450 ℃, Increment 1 ℃, Accuracy ± 0.1 ℃
2, temperature program: heating rate of 16 bands 0.1 ~ 80 ℃ / min
3, communication interfaces: Ethernet, IEEE802.3
4, the host size: 510 * 500 * 540 (mm)