High purity benzene is key in numerous chemical manufacturing processes. Even very small amounts of thiophene in benzene can poison catalysts making the determination of trace level amounts essential to the petroleum industry. ASTM Method D7011 covers the determination of thiophene in refined benzene using gas chromatography and sulfur selective detection.

This application note presents instrument configuration and operating parameters for the detection and quantitation of trace levels of thiophene in benzene using ASTM Method D7011 and PFPD.

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5383 Pulsed Flame Photometric Detector (PFPD)

The Model 5383 Pulsed Flame Photometric Detector (PFPD) uses superior sensitivity and increased selectivity to easily and accurately analyze sulfur, phosphorus, and 26 other elements.

The superior sensitivity of the 5383 PFPD makes it the instrument of choice for the analysis of sulfur, phosphorus, and other elements. Its linear, equimolar response to sulfur allows selective measurement of individual sulfur species from low ppb to ppm levels, and total sulfur as the sum of individual peaks. The unique capability to obtain simultaneous sulfur and hydrocarbon chromatograms from a single PFPD detector sets it apart from other sulfur detection technologies.

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