Product

Laboratory Instruments

GC Detectors - Specifications

FID (Flame Ionization) Detector Specifications

TypeSemi-cylindrical electrode, quartz jet
Detection limit 3 x 10-12 g/s for diphenyl
Dynamic range107
Electrometer noiseLess than 1.5% at max. sensitivity
Electrometer driftLess than 3% at max. sensitivity
Operational temperature range~ 450oC in 1oC increments

ECD (Electron Capture) Detector Specifications

TypeConstant current, 10mCi 63Ni radiation source
Detection limit0.2 pg for g-BHC
Dynamic range104
CellSealed source
Operational temperature range~ 350oC in 1oC increments (with overheat protection circuit)
Cell current0.05, 0.1, 0.2, 0.5, 1, 2 nA, variable by step
Range selection100 and 101

Clean ECD (ECD-C14) Detector Specifications

TypeConstant current, 10mCi 63Ni radiation source
Detection limit0.2 pg for g-BHC
Dynamic range3 x 103
CellSealed source

TCD (Thermal Conductivity)Detector Specifications

TypeDifferential type cell with a semi-diffusion flow line.
FilamentsFour, rhenium-tungsten (100 Ohms each)
Bridge current supplyConstant current system (with automated protection)
Sensitivity20,000 mV · mL/mg for nonane
Detector cell volume4 mL
Operational temperature range~ 400oC in 1oC increments

FPD (Flame Photometric) Detector Specifications

TypeSelective detection of sulfur and phosphorus (simultaneous detection available); Direct heating with induction current.
Detection limit5 x 10-11 g S/s for sulfur in thiophene, 1.4 x 10-12 g P/s for phosphorus in parathion
Safety circuitAutomated control of photomultiplier tube current
FID monitorFID signals are available by adding the optional FID electrode
Dynode voltage?700 V max.
Range4 steps (0 ? 3), (100, 101, 102, 103)
Linearity104 (tri-n-butyl phosphate)
Operational temperature range~ 350oC in 1oC increments

FTD (Flame Thermionic) Detector (also called NPD) Specifications

TypeDirect heating with induction current
Detection limit3.5 x 10-14 g N/s for azobenzene

2 x 10-15 g P/s for parathion

Selectivity1.5 x 104 gC/gN for azobenzene

1.5 x 105 gC/gP for parathion

Dynamic range1.5 x 104
Operational temperature range~ 450oC in 1oC increments

PID (Photo Ionization)Detector Specifications

TypeSelective detection of compounds ionized by a UV lamp source
Lamp type 10.2 eV
Detection limit2 pg of benzene
Dynamic range107
OtherEM-9/14 electrometer is required. All electrometer specifications are identical to FID specifications