Tengzhou Zhongkepu is a professional manufacturer of gas chromatographs and portable chromatography equipment. The equipment produced complies with national standards and is favored and recognized by users in the market. The following are the detailsDetermination of ethanol content in xylose fermentation broth by gas chromatographyDetailed analysis of price, usage method, instrument structure, and service system:

Method principle】The ethanol content of xylose fermentation is generally less than 1%, which is difficult to accurately measure using the attached temperature specific gravity bottle method and the specific gravity meter method. Both the standard method and the national standard method use the potassium dichromate oxidation method, which has certain limitations and is relatively cumbersome to operate And the capillary column gas chromatography method is used for determination, which is simple, fast, accurate and reliable. This article determined the ethanol content in xylose fermentation broth by selecting appropriate chromatographic conditions, treating the sample solution, and selecting suitable internal standards.

Classic gas chromatography analysis spectrum

Instrument configuration and reagents

GC-2020 gas chromatograph（Determination of ethanol content in xylose fermentation broth）Performance characteristics

1. Adopting320 x 240dot matrix5.7An 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℃/min 200℃Up to the biggest20℃/min