Gas chromatograph detection of aromatic hydrocarbons in the air (occupational health assessment industry)

1、 Gas phase part

Overview: National StandardGBZ/T 160.44－2004

2、 Detection index: detection of aromatic hydrocarbon compounds

IIIInstrument configuration:

1.Thermal desorption device: temperature controllable, gas flow rate adjustable, with six way valve, with quantitative tube

2.Single hydrogen flame gas chromatograph: high sensitivity

3.Capillary chromatography column: weak polarity50m*0.32mm*0.5um

4.Standard: Contains benzene, toluene, xylene, ethylbenzene, styrene, with a concentration of approximately100mg/L

5.Dual channel atmospheric sampler: accurate flow control

6.Sampling adsorption tube:Tenaxstainless steelBefore use, nitrogen should be used to heat and activate, with an activation temperature of 300 ℃ and an activation time of no less than 30 minutes, until there are no impurity peaks; Analysis temperature 280 ℃

7.Dual channel chromatography workstation

8.Nitrogen hydrogen air gas generator

4 Experimental conditions:

1. Column temperature: initial temperature60℃The initial temperature is 5 minutes, the heating rate is 6 ℃/min, the final temperature is 250 ℃, and the final temperature is 5 minutes.

2. Carrier gas: nitrogen; The pressure in front of the column is 0.06Mpa; split injection

3. Vaporization: 220 ℃, detector: FID 250 ℃

Five Instrument parameters and characteristics

1Adopting a 320 x 240 dot matrix 5.7-inch ultra large 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 control channels (vaporization chamber and capillary vaporization chamber can independently control temperature), with a five stage programmed temperature rise 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;

6The intelligent fuzzy control rear door opening system automatically tracks temperature and dynamically adjusts it. The angle of the air door can achieve precise temperature control even near room temperature;

7Configure a capillary split/non split injection device with membrane cleaning and filling column head injection, glass lining injection, and the ability to install 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 ℃ increments 0.1 ℃

2.Temperature control accuracy: better than ± 0.01 ℃

Program heating: Fifth order constant temperature time 0-999 minutes increment 0.1 minutes temperature increment 0.1 ℃

Heating rate: maximum 40 ℃/min at 200 ℃, maximum 20 ℃/min at 200 ℃

Main technical specifications of the detector

Hydrogen flame ionization detector (FID)

(1)Cylindrical collection electrode structure design, quartz nozzle, responsive*

(2)Detection limit: ≤ 8 × 10g/s (n-hexadecane/isooctane)

(3)Baseline noise: ≤ 2×1

The above is a detailed introduction to the gas chromatograph for analyzing aromatic hydrocarbons in the air (occupational health evaluation industry). The product is provided by Tengzhou Zhongkepu Analysis Instrument Co., Ltd. If you are interested in the product information of Tengzhou Zhongkepu Analysis Instrument Co., Ltd., you can contact the supplier or let the supplier take the initiative. You can also view more products related to aromatic hydrocarbons!