Agriculture High Performance Gas Chromatography (GC8120N)

GC8120N high performance gas chromatography
GC8120N enable to install two electron capture devices, two flame emission photography and two ambipolar capillary columns at same time. Satisfy all the needs in pesticide residue testing area. The "Grob" with temporary anti-distributary sampling port and PTV large scale sampling device dramatically improve the sensibility, and effectively perfect the lower limit of pesticide residue's testing accuracy. It extra applies with auto sampling device which with pre and post sampling cleaning, bubble wiping, speed sampling and slow sampling etc multi-functions, make the operation simpler and smoother.

Main technical indexes
Temperature control range: (ambient temperature + 8degrees)-400degrees(increment: 1degrees)
Temperature control object: Column compartment, testing room, vaporize chamber, auxiliary room 1, 2.
Temperature programming level: 5;
Temperature programming speed: 0.1-40degrees/min(increment: 1degrees/min).
When ambient temperature reaches 8degrees-200degrees, temperature programming speed is 0.1-40degrees/min;
When ambient temperature over 200degrees, temperature programming speed is 0.1-20degrees/min;
Constant temperature time: 0-655min (increment: 1 min)
Reduction of speed: 400degrees to 50degrees, less than 8 min.

Flame photometric detector:
S testing: Sensitivity Mt≤ 3× 10-11g(S)/s (N2, thiophene), linearity range: 103
P testing: Sensitivity Mt≤ 2× 10-12g(P)/s (N2, ethyl group -1605), linearity range: 104
Electron capture detector:
Sensitivity: Mt≤ 8× 10-14g/ml (N2, r-666), linearity range: 104
Main capacity feature:
Temperature control system with LCD LED display enable to control temperature range (ambient temperature + 8degrees-400degrees, high accuracy excel± 1degrees)of column compartment, TCD room, ionization room, vaporize chamber, auxiliary room 1, 2, etc six heating zones. This dresses the column compartment with the capacity of constant temperature control, five grades temperature program control and back door speeding cool down; Also enable to implement approximate ambient temperature operation.

Enable to install 2 sampling ports, 4 detectors, 2 suits of capillary column.

Specific capillary column sampler (distributary/ distributary less): Independent carrier gas circuit system, make up gas circuit, gas circuit with septum cleaning and distributary flow pass with back pressure valve control. When under the constant pressure control model to correct distributary ratio, it is effective less to column flux; Back pressure valve control largely decreases the distributary disproportion effects from column pressure fluctuation; Make up gas system guarantee good peak shape and high sensibility for best operation; Gas circuit with septum cleaning function corrects ghost peak. Above well-designed capillary column sampling system is very suitable for complex sample testing, also effectively prevents ghost peak generation from high temperature sampling process. There are few optional methods for this sampler to achieve Grob stop flow injection: Distributary/ distributary less, capillary column with wild calibre direct injection and magnet valve with time program distributary gas circuit on off. Magnet valve is suitable for trace material testing.

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