DFPD双火焰光度检测器

Flame Photometric Detector (FPD) is a high sensitivity and high selectivity gas chromatographic detector for the determination of sulfur phosphide. However, the selectivity of FPD is not good, and the sensitivity is not high when the concentration of sulfide is measured, and the linearity is poor. Therefore, when the sample contains a large number of hydrocarbons, you must use the column to completely separate the hydrocarbons and sulfides, the selectivity (S / C) of 10 to 4, otherwise it will be severely interfered by hydrocarbons, Even the signal completely disappeared.

 

        Tengzhou City, the vast spectrum of instruments Technical Services Limited developed GC790DFPD dual flame photometric detector, the components in the upper and lower flame at the same time burning, when the solvent peak, the flame may be extinguished, the flame is still burning until the solvent peak after the flame Will automatically ignite. DFPD avoids the disadvantage of SFPD being easily quenched, and the sulfur response is proportional to the square of the sulfur atom flow rate, independent of the molecular structure of the compound, but slightly less sensitive than SFPD.