【 Product Name 】 Gas Chromatography for Trace Thiophene Analysis in Pure Benzene
【 Research and Development Background 】 Benzene is an important raw material for dyes, plastics, synthetic rubber, synthetic resins, synthetic fibers, synthetic drugs, and pesticides. It is also a solvent for coatings, rubber, adhesives, and can be used as a fuel. In industry, it is mainly obtained through petroleum cracking and partial extraction and fractionation of light oil from coal tar. When producing aniline and styrene from benzene, it is required that the content of thiophene must be very low, otherwise it will have a significant impact on the yield of aniline and the styrene catalyst.
After hundreds of experiments and comparative tests, the technical personnel of Tengzhou Zhongkepu have successfully developed a new method for determining the thiophene content in coking benzene by gas chromatography. This method has shortened the measurement time from 3 hours to the current 9 minutes, improved the working environment for employees, reduced inspection costs, and increased work efficiency. By using a GC2020 gas chromatograph equipped with a high-sensitivity flame photometric detector, the trace thiophene content in benzene is determined qualitatively by retention time and quantitatively by peak area or peak height.
[Product Configuration]
Product Name, Model, Specification, and Description
Gas chromatograph GC2020 FPD, packed column injection system
Chromatography workstation N2000 dual channel (computer, printer self equipped)
Chromatographic column packed column 4 * 3mm (thiophene detection)
High purity hydrogen generator HK-300, hydrogen flow rate 300ml/min
High purity air generator AK-2000 air flow rate 2000ml/min
High purity nitrogen cylinder 40L nitrogen flow rate 300ml/min
5ml standard sample 0.1ppm thiophene standard sample

This configuration is a gas chromatograph for analyzing trace amounts of thiophene in pure benzene. The instrument can detect up to 0.03ppm of thiophene at low concentrations

Introduction to the characteristics of GC2020 gas chromatography instrument:

◆Fully computerized button operation, 5.7-inch large screen with 13 line LCD Chinese display, human-machine dialogue mode, easy to operate.

◆The brand new integrated digital electronic circuit has high control accuracy, stable and reliable performance, high-precision temperature control of 50 times per second, and an accuracy of up to 0.1 ℃.

◆Large column box volume: 300 * 280 * 180, accommodating multiple chromatography columns and two 100 meter 0.53 capillary columns to the greatest extent possible.

◆Introducing foreign sample inlet designs to address sample discrimination; The dual column compensation function not only solves the program drift caused by temperature rise, but also reduces the influence of background noise, resulting in a lower detection limit.

◆Intelligent rear door opening system, dual door design, infinitely variable inlet and outlet air volume, shortening the stable balance time of the system after program heating/cooling; Heating furnace system: (temperature range) ambient temperature+5 ℃~400 ℃. The temperature equilibrium time of the heating furnace is determined by the user.

◆Three injectors and three detectors can be installed simultaneously to solve complex sample analysis problems for customers.

◆Better insulation effect: When the column box, vaporization, and detection are all at 300 degrees, the hottest spot on the outer box and top cover is only 40 degrees, which increases the experimental speed and ensures the safety of users.

◆Optional expansion devices such as automatic/manual six way injection valve, headspace sampler, thermal analysis sampler, cracking furnace, methane conversion furnace, etc. can be installed to facilitate the analysis of special samples.

◆It has a power on self-test function, fault display, automatic protection, instant power-off protection, and strong anti-interference ability.

Excellent design concept:

◆Vaporization chamber design *, with smaller dead volume;

◆Easy replacement of accessories: the injection pad, liner, polarizing electrode, collection electrode, and nozzle can all be replaced with one hand;

◆Easy replacement of the main body: The filling column, capillary sampler, TCD, FID detector can be disassembled with just one wrench, making maintenance very convenient;

◆Excellent nozzle: * High temperature resistant quartz design, less prone to breakage and better inertness, rotating seal, better sealing *;

◆Reasonable positioning: * Capillary positioning system effectively ensures the repeatability of column installation and constant combustion rate;

◆Column head injection: Fill the column head injection to effectively prevent diversion discrimination effects.

Technical parameters:

Column box:

◆Temperature control range: Room temperature+5 ℃~399 ℃ (increments of 0.1 ℃)

◆Cheng Sheng order: Thirteen orders

◆Cheng Sheng rate: 0.1 ℃~50 ℃ (incremental 0.1 ℃)

◆Cheng Sheng holding time: can be set by the user themselves

Sample injector:

◆Zui can install up to 3 injection systems simultaneously

◆Injection unit: Fill column injection system

Split/non split capillary injection system (with diaphragm cleaning function)

◆Temperature control range: room temperature+5 ℃~399 ℃

Detector:

◆Zui can install three detectors simultaneously

◆Temperature control range: Room temperature+30 ℃~400 ℃

Hydrogen flame ionization detector (FID):

◆Sensitivity: ≤ 5×10^-12G/s (n-hexadecane)

◆Dynamic range: ≥ ten⁶

◆Baseline noise: ≤ 1×10^-13A

◆Stable time:< 20min

◆Insulation strength: ≥ 1500 volts, 220V leakage current ≤ 1mA

Thermal conductivity detector (TCD):

◆Sensitivity: S ≥ 10000mv. ml/mg (n-hexadecane)

◆Dynamic range: ≥ ten⁶

◆Baseline noise: ≤ 20uV (hydrogen with a carrier gas of 99.999)

Our company will configure the instrument according to the analysis needs of the actual sample, in order to better meet the actual needs of the sample. If you feel that the above configuration does not meet your sample requirements, you can make your request, and the company will configure the instrument according to your needs