Estimation of hydrogen sulfide from crude petroleum: a unique invention using a simple chemosensor

Abstract

A unique chemosensing technique has been introduced to explain a new strategy for the selective detection and estimation of hydrogen sulfide in crude petroleum oil. A naphthalimide–salicylaldehyde based imine (NPSI) chemosensor detects and measures H₂S in the nanomolar range colorimetrically and fluorimetrically at very low cost and in less time. The “turn-on” signaling of NPSI upon interaction with H₂S has been well justified by spectroscopic and theoretical techniques. The probe is equally capable of detecting H₂S even in the gas phase. The potentiality of the probe NPSI can be implied to develop a real-time sensor to detect the exposure of such a harmful gas in the petroleum industry and to protect our environment as well.