ASTM D2887 gas chromatography system for boiling range distribution(DGA-2014B)

(fuel, kerosene, diesel, lubricants, wax oil )

2. Applicable boiling range: crude oil of initial boiling point~538℃ boiling range distribution. Get distribution proportion of fuel, diesel, kerosene, heavy oil. Since the heavy components above 538℃ can not show peak, it adopts incremental internal standard method and complies to ASTM D5307 standard.

3. Applicable boiling range: petroleum products or distillates of 55~680℃ boiling range distribution. On this chromatographic condition tested sample components can all show the peaks. It adopts area normalization method to fix quantity.

1. Adopts American Agilent 5890 gas chromatographic core tech; green backlight LCD screen; easy operation
2. Temperature control upper limit max use temperature of 450℃for every instrument heating area.
3. Dual channel single column compensation; base line drift when program heat to operate FID test; ensure base line straight and chromatography peak shape perfect.
4. Adopts imported heat-resistant large aperture metal capillary column to separate; mas analysis use temperature of 450℃.
5. Can display and print C5-C44 n-alkanes calibration sample boiling point-time calibration curve.
6. Can provide oil sample boiling point-yield boiling range curve.
7. Can provide detailed boiling range report regarding 1% yield interval; also can provide it regarding 5℃, 10℃, 20℃, 30℃, 50℃, 100℃ boiling range.
8. Can be equipped with AS-2902 highly efficient auto liquid sample injector; auto injection analysis with unattended operation achieved; analysis efficiency improved and labor intensity reduced.

Temperature control index
Oven/ Sample injector/ detector: above room temperature 5℃~450℃; precision ±0.1℃

Column oven parameters
Temperature control range: above room temperature 5℃~450℃; precision ±0.1℃
Program heating stages: 3 stages
Program heating speed: 0.1℃~50℃, increment 0.1℃
Program heating keeping time: 0~655 min (increment 1 min)
Big oven volume; back pullout design; program quick cooking after heating. Cooling speed: only 7min from 350℃ down to 60℃.

Injection method
Capillary split/unsplit stream injection: flash distillation injection
Packed column head injection: flash distillation injection
Can be equipped with unattended operation auto injector.

Hydrogen flame ionization detector (FID)
Easy disassembly and installation; convenient for cleaning and displacing nozzle; easy operation; can input signal to logarithmic amplification to reduce interference; high sensitivity, good linearity and wide range.
Limit of detection (LOD): Mt ≤ 5×10-12g/s (n-Hexadecath)
Baseline noise: ≤ 6×10-12A/H
Linearity range: ≥ 105
Stability time: < 0.5h

Chromatographic working station
24 bits high precision digital-to-analogue conversion (DAC)
Dual channel synchronous or asynchronous work
USB port; can be connected to external power supply; with serial port
Input voltage range: -1V~1V
Integral sensitivity: 0.05uV•s
Min solution: 1uV
Dynamic range (DR): 107
Sample frequency: Max 60 times/sec; adjustable program variables

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