GC- 双火焰光度检测器DFPD

Analysis of Trace Thiophene in Benzene by GC-DFPD Dual Flame Photometric Detector

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, 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 chromatography Instrument Technology Service Co., Ltd., advancing with the times, under the guidance of scientific development, under the leadership of Wang Xiaoying manager, relying on Xiangying Analytical Technology Research Institute, Chromatography Engineering Research Center, Analysis and Testing Center, 3 scientific research units , The successful development of GC-DFPD dual flame photometric detector for the analysis of trace benzene in thiophene. The new detector has two upper and lower flames, the lower flame is an oxygen-enriched flame, used for organic sulfur, phosphorus compounds and hydrocarbons to generate the corresponding oxide; the flame is a hydrogen-rich air flame, organic Sulfur, phosphorus oxide reduced to S2, HPO and other chemiluminescent molecules. While the oxidation products of hydrocarbons such as CO2, H2O and other non-optical signals, so DFPD can exclude hydrocarbon interference, and selective measurement of sulfur phosphorus compounds. For quantitative analysis, the sulfur signal is linearly proportional to the square of the sulfide concentration (or the square root of the signal is linearly related to the concentration), the response to sulfur is 10-12 g / s, the response to sulfur is 10 -11 g / sec. At the same time the detector has a dual-beam system, to achieve a simultaneous injection of sulfur and phosphorus compounds. So DFPD has high sensitivity, good selectivity, fast response time, high efficiency, can be connected to the capillary column, packed column and so on, so in environmental protection, engineering science, food testing, and pesticide residue test A wide range of applications.

The vast spectrum, while supply: flame photometric detector FPD

Hydrogen Flame Detector

Thermal conductivity detector

Electron Capture Detector

NPD Detector

GC-DFPD Dual Flame Photometric Detector for Analysis of Trace Thiophene in Benzene:

Determination of trace thiophene in pure benzene: