Dimethyl dodecanedioate is a widely used fine chemical product,It has many derivative products,Commonly used as raw materials in industries such as pharmaceuticals, spices, hot melt adhesives, polyacrylic acid, and polyacrylic acid. In terms of synthesis methods,There are two types:One is the cooldown method,Prepared by methylation of dodecanedioic acid and alcohols;Another method is direct synthesis,Produced from cyclohexanone as the main raw material through peroxide ring opening dimerization. among,The product obtained by the unitary method has simple ingredients,Analysis is relatively easy;And the crude vinegar product obtained by direct synthesis method,Excessive components,The response values of each component vary greatly,There are still a small amount of high boiling point substances that do not peak,Add volatile solvents to dry the dough,Relatively difficult to analyze,therefore,How to establish a fast, accurate, and effective analysis method,The analysis method for quantitative detection of crude dodecanedioic acid dimethyl vinegar content using gas chromatography in Tengzhou Zhongkepu is of great significance.

Dimethyl dodecanedioic acid vinegarTypical gas chromatogram

Instrument configuration and reagents

GC-2020 gas chromatographPerformance characteristics

1. Adopting320 x 240lattice5.7An inch large screen LCD Chinese display, real-time display of various temperatures and operating conditions, clear and intuitive content, truly realizing human-machine dialogue;
2Power on self-test, wide range self diagnostic function, can accurately determine the fault location and alarm;
3Six independent temperature controls (vaporization chamber and capillary vaporization chamber can be independently controlled), Five level program heating function;
4Overtemperature Protection function: If any circuit exceeds the set temperature, the instrument will automatically power off and sound an alarm;
5The vertical heating device of * makes sample vaporization more reliable, reduces the heat radiation generated in the vaporization chamber to the minimum, and ensures minimal temperature deviation inside the column box;
6Intelligent fuzzy control rear door opening system, automatically tracks temperature and dynamically adjusts The angle of the air door can achieve precise temperature control even near room temperature;
7Configure filling column head injection, glass lining injection, with diaphragm cleaning Functional capillary diversion/Non split injection device and capable of installing gas injectors;
8High precision dual stable gas path, capable of installing four types of detectors simultaneously;
9Optional electronic flow pressure display system with built-in workstation device.

Temperature control indicators
1.Temperature control range: room temperature 5℃～400℃increment0.1℃
2.Temperature control accuracy: superior to±0.01℃

Program heating: Five step interval constant temperature time0～999minincrement0.1minTemperature increment0.1℃
Heating rate:200℃The biggest one below40℃/min200℃Up to the biggest20℃/min