Detailed information of SP-3420A sulfur phosphorus trace detection dedicated chromatograph:
Flame photometric detector (FPD) uses a hydrogen rich flame to decompose organic compounds containing sulfur and phosphorus heteroatoms, forming excited molecules. When they return to their ground state, they emit light of a certain wavelength. The intensity of this light is directly proportional to the component being measured. So it is a detection method based on the interaction between matter and light, belonging to the photometric method. Because it emits light after molecular excitation, it is a molecular emission detector in photometry. FPD is a highly sensitive and selective detector characterized by a nonlinear response to sulfur, mainly used for trace detection of sulfur and phosphorus compounds.
technical parameter
Temperature control indicators
Column box 4 * 4-stage programmed heating, with a heating rate of 0.1-50 ℃/min;
Column box temperature range: 20 ℃ to 400 ℃ above room temperature
Temperature range of injector: room temperature to 400 ℃
Detector temperature range: room temperature to 400 ℃
● Auxiliary box temperature range: room temperature~400 ℃
Temperature control accuracy: ± 0.1 ℃

Detector system indicators
● TCD: S ≥ 5000mv. ml/mg (butane in He)
●FID：D≤8×10-12g/s （n-C16）
●ECD：M≤2×10-13g/ml （r-666）
TSD: Nitrogen measurement D ≤ 2 × 10-13g/s (azobenzene)
Phosphorus measurement D ≤ 1 × 10-13g/s (malathion)
FPD: sulfur measurement D ≤ 2 × 10-10g/s (methyl parathion)
Phosphorus measurement D ≤ 2 × 10-12g/s (methyl parathion)

Basic parameters
● Instrument dimensions (height x width x depth): 500 x 588 x 550 (mm3)
Working voltage: AC 220V ± 10% 50Hz
● Power consumption: 1650W
Net weight of the instrument: 50kg