مشخصات پژوهش

عنوان	Determination of 2,4,6-Trinitrotoluene in Soil Samples Using a Paired Emitter-Detector Diode-Based Photometer
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Paired emitter-detector diode-based photometer, Determination, Soil analysis, TNT, Point-of-use testing
چکیده	Light-emitting diodes (LEDs) can be used in paired emitter-detector diodes (PEDD) optical sensors as both the light source and the detector. PEDD-based photometers provide low fabrication cost, low power consumption, ease of miniaturization, and a high signal-noise ratio response in a wide wavelength range. This paper reports on developing a cheap but efficient PEDD-based photometer. The photometer consists of a white LED as the emitter diode, an RGB LED as the detector diode (for the first time), and a multimeter for recoding the signal. The developed PEDD-based photometer was utilized for the determination of 2,4,6-trinitrotoluene (TNT) in soil samples. A Meisenheimer complex of TNT with NaOH in acetonitrile was used as a probe to monitor the presence of residual TNT in soil samples. The calibration curve in the soil sample was linear in the concentration range of 0.86 to 110 µg g-1, with a detection limit of 0.27 µg g-1 and a quantification limit of 0.81 µg g-1. Analysis of the soil samples collected from the Iran Cinema and Television Town using the developed method showed trace residual of TNT.
پژوهشگران	فاطمه قبادی سرشت (نفر اول)، مظاهر احمدی (نفر دوم)، سینا خلیلی (نفر سوم)، محسن مجیدی (نفر چهارم)