Product Introduction:

Product Introduction:

Special analysis of plasticizer for composite plastic filmgas chromatographGC-7900 is a cost-effective analytical instrument that is controlled by a microcomputer, operated by a keyboard, and displayed with a Chinese menu on a LCD screen. It has high electronic circuit integration, good reliability, simple operation, memorization of set parameters, no need to reset every time, and is suitable for long-term operation. The combination of a large column box and a large fan with an automatic rear door cooling system has increased the cooling speed of the column box, truly achieving operation at room temperature+5 ℃. The instrument can flexibly use capillary columns, glass columns, and stainless steel columns. Can perform constant temperature and programmed heating operations.

Special instrument configuration for composite plastic film: host+FID+capillary column injection.

Characteristics of Gas Chromatography GC-7900 Instrument:

1. The instrument adopts LCD Chinese display, and the operating conditions are clear at a glance. There is no need to reset parameters when starting up, it is simple and direct.

2. The instrument has touch button input and keyboard locking function to prevent accidental operation from disrupting the normal use conditions of the instrument.

3. Each gas path of the instrument is controlled separately, and the control valve has high accuracy and good reproducibility, which can effectively ensure the consistency of each analysis.

4. The overall performance of the instrument is stable, able to adapt to long-term uninterrupted operation, with short analysis time and high analysis efficiency.

Gas chromatograph GC-7900The reference conditions are as follows:

a)Chromatography column: Polyethylene glycol quartz capillary column, column length60m, inner diameter0.25mm, film thickness0.25um, or equivalent column;

b)Column temperature: Initial temperature40℃Maintain it1min, in order to4℃/min, ascend to130Raise the temperature to 200 ℃ at a rate of 20 ℃/min and maintain it for 5 minutes;

c)Detector temperature:250℃；

d)Injection port temperature:250℃；

e)Carrier gas flow rate:1.0ml/min；

f)Injection volume:1.0ul；

g)Split ratio:20: 1.

Performance indicators of gas chromatograph GC-7900:
1、 Temperature control index parameters:
1. Temperature control range: room temperature+5 ℃~400 ℃, increment 0.1 ℃
2. Temperature control accuracy: better than ± 0.01 ℃
Program heating: Eight step constant temperature time from 0 to 999min
Increment of 0.1 minutes, temperature increment of 0.1 ℃
Heating rate:
Maximum 40 ℃/min at 200 ℃
Maximum 20 ℃/min at 200 ℃

2、 Detector indicator parameters:
Hydrogen Flame Detector (FID):
Sensitivity Mt ≤ 3 × 10-12g/s (n-hexadecane)
Noise ≤ 5 × 10-14A linear range ≥ 106